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G P S 1 5 5 X L

P i l o t ’ s G u i d e a n d R e f e r e n c e

INTRODUCTION

Foreword

This manual is written for software version 2.04 or above, and is not suitable for

earlier software versions.

GARMIN International, Inc., 1200 East 151st Street, Olathe, Kansas 66062 USA

Tel: 913-397-8200 Fax: 913-397-8282

GARMIN (Europe) LTD, Unit 5, The Quadrangle, Abbey Park, Romsey, Hampshire S051 9AQ, UK

Tel: 011-44-1794-519944 Fax: 011-44-1794-519222

GARMIN (Asia) Corp., 3rd Fl., No. 1, Lane 45, Pao-Hsing Road, Hsin Tien, Taipei, Taiwan R.O. C.

Tel: 011-886-02-2917-3773 Fax: 011-886-02-2917-1758

Web Site Address: www.garmin.com

form or by any means, electronic or mechanical, including photocopying and recording,

for any purpose without the express written permission of GARMIN.

Information in this document is subject to change without notice. GARMIN reserves

the right to change or improve their products and to make changes in the content of this

material without obligation to notify any person or organization of such changes or

improvements.

January 1999 190-00067-20 Rev. B Printed in USA

GARMIN, GPS 155XL, Spell’N’Find, AutoLocate,

PhaseTrac12, and AutoStore are trademarks of

GARMIN and may only be used with permission.

NavData®is a registered trademark of

Jeppesen, Inc.

CAUTION

The Global Positioning System is operated by the United States government,

which is solely responsible for its accuracy and maintenance. The system is subject to

changes which could affect the accuracy and performance of all GPS equipment.

Although the GARMIN GPS 155XL is a precision electronic NAVigation AID

(NAVAID), any NAVAID can be misused or misinterpreted and therefore become

unsafe.

Use the GPS 155XL at your own risk. To reduce the risk of unsafe operation,

carefully review and understand all aspects of this Owner’s Manual and the Flight

Manual Supplement, and thoroughly practice using the simulator mode prior to actu-

al use. When in actual use, carefully compare indications from the GPS 155XL to all

available navigation sources, including the information from other NAVAIDS, visual

sightings, charts, etc. For safety, always resolve any discrepancies before continuing

navigation.

The altitude calculated by the GPS 155XL is geometric height above mean sea

level and could vary significantly from altitude displayed by pressure altimeters in air-

craft. use GPS altitude for vertical navigation.Never

The Jeppesen database incorporated in the GPS 155XL must be updated regularly

in order to ensure that its information is current. Updates are released every 28 days.

A database information packet is included in your GPS 155XL package.

Pilots using an out-of-date database do so entirely at their own risk.

NOTE: This device complies with Part 15 of the FCC

limits for Class B digital devices. This equipment gener-

ates, uses, and can radiate radio frequency energy and, if

not installed and used in accordance with the instruc-

tions, may cause harmful interference to radio communi-

cations. Furthermore, there is no guarantee that interfer-

ence will not occur in a particular installation.

If this equipment does cause harmful interference, the

user is encouraged to try to correct the interference by relo-

cating the equipment or connecting the equipment to a dif-

ferent circuit than the affected equipment. Consult an

authorized dealer or other qualified avionics technician for

additional help if these remedies do not correct the problem.

Operation of this device is subject to the following

conditions: (1) This device may not cause harmful inter-

ference, and (2) this device must accept any interference

received, including interference that may cause undesired

operation.

The GARMIN GPS 155XL does not contain any user-

serviceable parts. Repairs should only be made by an

authorized GARMIN service center. Unauthorized repairs

or modifications could void your warranty and authority

to operate this device under Part 15 regulations.

INTRODUCTION

Cautions

Accessories & Packing List

Congratulations on choosing the finest, most advanced panel mount IFR

GPS receiver available. The GPS 155XL represents GARMIN’s commitment to provide

an accurate, easy-to-use GPS for all of your aviation needs.

Before installing and getting started with your unit, please check to see that your

package includes the following items. If any parts are missing or damaged, please see

your GARMIN dealer immediately.

Standard Package:

• GPS 155XL Unit & NavData® Card

• GPS Antenna

• Installation Rack & Connectors

• Pilot’s Guide & Quick Reference Guide

• Database Subscription Packet

• Warranty Registration Card

Optional Accessories:

• Remote Battery Pack

• AC Adapter

• PC Software/Interface Kit

• User Data Card

• 28 to 14 volt DC converter

• MD-41 External Switch/Annunciator iii

INTRODUCTION

Accessories and

Packing List

To obtain accessories for your GPS 155XL,

please contact your nearest GARMIN dealer.

INTRODUCTION

Warranty

To obtain warranty service, see your local dealer

or call the GARMIN Customer Service department

for a returned merchandise tracking number. The

unit should be securely packaged with the tracking

number clearly marked on the outside of the

package, and sent freight prepaid and insured to a

GARMIN authorized warranty service facility.

GARMIN is fully committed to your satisfaction as

a customer. If you have any questions regarding

the GPS 155XL, please contact our customer ser-

vice department at:

GARMIN International, Inc.

1200 East 151st Street

Olathe, KS 66062-3426

(913) 397-8200

FAX (913) 397-8282

Every GARMIN GPS is built to exacting standards to provide years of trouble-free

service. GARMIN warrants this product to be free from defects in materials and

workmanship for one year from the date of purchase.

GARMIN International, Inc. will at its sole option, repair or replace any

components which fail in normal use. Such repairs or replacement will be made at

no charge to the customer for parts or labor. The customer is, however, responsible

for any transportation costs. This warranty does not cover failures due to abuse,

misuse, accident or unauthorized alteration or repairs. GARMIN International, Inc.

assumes no responsibility for special, incidental, punitive or consequential damages,

or loss of use.

THE WARRANTIES AND REMEDIES CONTAINED HEREIN ARE EXCLUSIVE,

AND IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED, INCLUD-

ING ANY LIABILITY ARISING UNDER WARRANTY OF MERCHANTABILITY OR

FITNESS FOR A PARTICULAR PURPOSE, STATUTORY OR OTHERWISE. THIS

WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, WHICH MAY VARY FROM

STATE TO STATE.

PART ONE: INTRODUCTION

Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .i

Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ii

Accessories/Packing List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .iii

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .iv

Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .v-vi

Key and Knob Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .vii-viii

GPS 155XL Takeoff Tour . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9

PART TWO: REFERENCE

Section 1: Navigation with the GPS 155XL (

key) . . . . . . . . . . . . . . .10

Navigating and planning functions

Section 2: Waypoint and Database Information (

key) . . . . . . . . . . . .32

Finding and using database and waypoint information

Section 3: Nearest Waypoints (

key) . . . . . . . . . . . . . . . . . . . . . . . . .53

Finding nearest waypoints, SUAs and FSS/ARTCC frequencies

Section 4: Direct-to (

key) & Route Navigation (

key) . . . . . . . .58

Creating and using routes

Section 5: Approaches, SIDs and STARs (

key) . . . . . . . . . . . . . . . . .74

Selecting and flying non-precision approaches

Section 6: Messages and Unit Settings (

key) . . . . . . . . . . . . . . . . . .96

INTRODUCTION

Table of Contents

To quickly and easily locate information

on specific tasks, please refer to the Index

on page 130.

INTRODUCTION

Table of Contents

Appendix A: NavData®and User Data Card Use . . . . . . . . . . . . . . . .108

Appendix B: Installation and Maintenance of the GPS 155XL . . . . . . .110

Appendix C: Simulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .111

Appendix D: GPS 155XL Messages and Abbreviations . . . . . . . . . . . . .113

Appendix E: Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .121

Appendix F: Map Datums . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .122

Appendix G: Troubleshooting Q & A . . . . . . . . . . . . . . . . . . . . . . . . .124

Appendix H: Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .130

Key and Knob Functions

The power/intensity knob controls unit power and display intensity.

The zoom-in key is used to zoom in to the next smaller scale setting when

viewing the map page.

The zoom-out key allows you to zoom out to the next larger scale setting

when viewing the map page.

The nearest key is used to obtain information on the 9 nearest airports,

VORs, NDBs, intersections, user waypoints and 2 nearest FSS/ARTCC

points of communication. The nearest key also accesses any active SUA

information. See Section 3 for more information on the nearest waypoints.

The route key enables you to create, edit, activate and invert routes, and

access approaches, SIDs and STARs. Search-and-rescue, parallel offset and

closest point of approach functions are also performed using the route key.

See Section 4 for more information on routes and Section 5 for more infor-

mation on approaches, SIDs and STARs.

The waypoint key is used to view information such as runways, frequen-

cies, position and comments on airports, VORs, NDBs, intersections and

user waypoints. See Section 2 for more waypoint information.

The navigation key is used to view navigation and position information.

Planning operations are also performed using this key. See Section 1

for more information on navigation and planning operations. vii

INTRODUCTION

Key and Knob

Functions

The GPS 155XL is designed to minimize

keystrokes when performing operations. There are

typically several ways to perform the same opera-

tion. In general, using the knobs will decrease key-

strokes and time spent using the GPS 155XL.

Experiment to find the most effective way to use

the GPS 155XL to your advantage.

After the GPS 155XL acquires satellites and computes a position, the position page

will appear automatically, and you’ll be informed with ‘Ready for navigation’ on the

message page.

The position page displays your present latitude and longitude, altitude and a refer-

ence waypoint field. The altitude and reference waypoint fields are also selectable (see

Section 1 for more information) to allow you to configure the unit to your own prefer-

ences. The default settings are:

• Altitude— Your present GPS altitude

• Present Position— Latitude and longitude displayed in degrees/minutes

• Reference Waypoint— The bearing and distance to the nearest airport

The position page is one of seven pages available under the GPS 155XL’s

key:

• NAV summary page • Map page

• NAVCOM page • Position page

• Satellite status page • NAV menu 1

• NAV menu 2

During most flights, the position, NAV summary, map and NAVCOM pages will be the

primary pages used for navigation. The pages are accessible by pressing the

key and

rotating the outer knob, or by pressing the

key repeatedly. 3

The map page combines a moving map display

and navigation data for complete situational

awareness.

TAKEOFF TOUR

Position Page

The navigation communications (NAVCOM) page

provides a complete list of airport frequencies at

your departure and arrival airports.

Altitude, MSA or ESA

Position (lat/lon)

Reference Waypoint Field

{

The NAV summary page without a direct-to

destination or active route appears blank, except

for ground speed (GS) and track (TRK) figures,

if displayed.

When a destination is selected, the direct-to

confirmation page appears to verify the

destination you selected.

The GPS 155XL uses direct point-to-point navigation to guide you from takeoff to

touchdown in the IFR environment. Once a destination is selected, the unit will provide

speed, course and distance data based upon a direct course from your present position

to your destination. A destination can be selected from any page using the

(direct-

to) .key

To select a direct-to destination:

1. Press the

key. The NAV summary page will appear with the destination field highlighted.

2. Rotate the

knob to enter the first letter of the destination waypoint identifier. The destina-

tion waypoint may be an airport, VOR, NDB, intersection or user waypoint, as long as it is in

the database or stored in memory as a user waypoint.

3. Rotate the

knob to the right to move the cursor to the next character position.

4. Repeat steps 2 and 3 to spell out the rest of the waypoint identifier.

5. Press

to confirm the identifier. The direct-to confirmation page will appear.

6. Press

to confirm the destination.

Once the direct-to destination is confirmed, the NAV summary page will appear

with the destination indicated in the lower left hand corner of the screen. Your present

speed and track over the ground, and the distance and estimated time enroute to your

destination are also displayed. The graphical CDI (course deviation indicator), located at

the top of the screen, displays your position relative to the desired course and provides

turn anticipation and waypoint messages during route navigation.

TAKEOFF TOUR

Direct-To Navigation

NAV Summary Page

In addition to the destination field and graphical CDI, the GPS 155XL NAV summa-

ry page features five selectable fields for various navigation data so that the page may be

configured to your own preferences (see Section 1 for more information). The default

settings for the NAV summary page are:

• Distance (dis)— The distance to your destination in nautical miles

• Ground Speed (gs)— Your present speed over the ground in knots

• Bearing (brg)— The direction from present position to your destination

• Desired Track (dtk)— The course between the ‘from’ and ‘to’ waypoints

• Estimated Time Enroute (ete)— The time to your destination (in hours

and minutes) based upon your present speed and course

The next page available from the

key is the . The map page combinesmap page

the primary navigation information from the NAV summary page – distance to way-

point, ground speed, bearing, desired track and ETE – with a moving map display. The

moving map display shows your current position (using an airplane symbol or a dia-

mond symbol) relative to nearby airports, VORs, NDBs, intersections, user waypoints

and airspace boundaries. Notice that the graphical CDI does not appear on the map

page; the graphical CDI does appear on all other GPS 155XL pages.

The map page can be divided into two main sections:

NAV summary page with ‘dtk’, ‘brg’ and ‘trk’

displayed.

NAV summary page with ‘trk’, ‘brg’ and ‘eta’

displayed.

TAKEOFF TOUR

NAV Summary &

Map Pages

Data

Fields

{

Map Display

The map display may be oriented along your

ground track (track up), course (desired track up)

or fixed at north up. Desired track up or north up

settings show your present position with a dia-

mond symbol instead of the airplane symbol.

TAKEOFF TOUR

Map Page

Distance and bearing to waypoint, destination

waypoint name and desired track are shown on

the left hand side of the map page. To remove the

data fields that border the map display, press \.

The map display occupies the right side of the display. Your present position is indi-

cated by a plane symbol (in track up mode) or a position diamond (in other orienta-

tion modes), with your route displayed as a solid line. Nearby airports, navaids and

user waypoints may be depicted on the map—with unique identifying symbols for each

waypoint type. Boundaries for special use and controlled airspaces can also appear on

the map display. You may select which features are shown on the map using the map

setup page (see page 97).

The data fields on the map page indicate distance and bearing to destination way-

point, desired track, ground track, ground speed, time to waypoint and map scale. The

destination waypoint name, bearing to waypoint, distance to waypoint and desired track

appear on the left side of the page. The other data fields are located at the corners of the

map display, as shown in the illustration above, and may be removed by pressing

Present

Position

Airspace

Boundaries

Airport Waypoint

Destination

Waypoint

Map

Scale

ETE

TRK

DTK

Distance & Bearing

to Waypoint GS

The map display has 14 available scales from 0.5 to 300 (nautical miles, statute miles or

kilometers) representing the vertical height of the map. The map scale is controlled by

the aand bkeys, with the current scale displayed in the lower right corner.

To select a map scale:

1. Press

ato increase the map scale and show a larger area (or turn

to the right).

2. Press

b to decrease the map scale and show a smaller area (or turn

to the left).

Another page available under the GPS 155XL’s

key is the navigation

communications (NAVCOM) page. It provides you with a complete list of airport fre-

quencies at your departure and arrival airports, allowing convenient selection of fre-

quencies you’ll need along your flight path. If you do not have an active departure air-

port, the navigation communications page will display the frequencies for the

airport nearest your departure position.

To view the NAVCOM page from the map page, rotate

one stop to the right.

The NAVCOM page lists your departure and arrival airports on the left side of the

page, with all the database frequencies listed in a column down the right side of the

page. To scroll through the list of frequencies, simply rotate the inner knob (

) in the

direction of the arrow prompts at the bottom left of the page.

Once a direct-to is activated, the NAV summary page will provide navigation to the

destination until the direct-to is cancelled or another direct-to destination is activated.

To cancel a direct-to from the NAV summary page:

1. Press the

key to activate the cursor in the destination field.

2. Press

3. Press

The NAVCOM page lists the frequencies for your

departure (or nearest) and arrival airports.

To change the map scale press

to increase the

scale or

to decrease the scale.

TAKEOFF TOUR

Map Scales

NAVCOM Page

The GPS 155XL’s

key provides the nine nearest airports, VORs, NDBs, inter-

sections, user waypoints and any SUA (special use airspace) alerts, as well as the two

closest FSS (Flight Service Station) and center (ARTCC) frequencies for your present

position. The nearest waypoint feature is a handy safety feature that may be used to

execute a quick direct-to in case of an in-flight emergency or to review the closest facil-

ities to your present position. The nearest feature can also be used to quickly find the

contact frequency of the nearest airport.

To view the nine nearest airports

1. Press the

key. The nearest airport will be displayed, with the range and bearing from

your present position, along with elevation, frequency and runway data.

2. To review the rest of the nearest airport list, rotate the

knob to the right.

To view the nearest list for other waypoint categories (VOR, NDB, etc.)

1. Rotate the

knob to the right, or press the

key repeatedly.

2. Rotate

to scroll through the list.

Once the nearest airport (or any other nearest waypoint) page is displayed, the

selected waypoint can be quickly reviewed or selected as a direct-to destination.

To review the selected waypoint from the nearest waypoint list

1. Press

to activate the waypoint field.

2. Press

to display the waypoint identification page.

3. Rotate

to view any additional waypoint information available.

4. Press

to return to the nearest waypoint page.

To view additional nearest airports, rotate the

K knob.

The nearest airport page shows up to nine

nearest airports from your present position.

TAKEOFF TOUR

Nearest Waypoints

To select a nearest waypoint as a direct-to destination

1. Press the

key. The direct-to confirmation page for the selected waypoint will appear.

2. Press

to confirm.

Congratulations! You’ve covered the basic operation of the GPS 155XL. We

encourage you to experiment with your new GPS receiver to get to know all the

advanced navigation features it has to offer. If you’d like a little more practice, try

using the built-in simulator described in Appendix C. An optional AC adapter will

even let you plan and simulate flights in the comfort of your home or office.

To turn the GPS 155XL off

1. Turn the

knob to the left until the unit shuts off.

NOTE: The GPS 155XL is normally connected to power through the avionics master

switch. With the optional remote battery installed, the unit will display a power down

warning when the master switch is turned off. This warning page features a timer which

will count down from 30 seconds when the unit senses that power is off. After 30 sec-

onds, the GPS 155XL will shut off. If you wish to

continue operating the unit, press

any key during the countdown period, and the GPS 155XL will continue operating

from the backup battery.

To select a nearest waypoint as your direct-to

destination, press D Eand .

To review a nearest waypoint, highlight the identi-

fier and press E.

TAKEOFF TOUR

Nearest Waypoints

Shutting Down

Remember! The NAV pages will only display infor-

mation the position and navigational infor-AFTER

mation has been calculated from the satellites. If you

are on the position page before the unit has calculat-

ed a position, you will be able to enter an approxi-

mate position and altitude. This is helpful in speeding

satellite acquisition if the unit has moved a great dis-

tance with the power off.

If you are not sure the GPS is actively calculating

position, check the receiver status field for ‘2D NAV’

or ‘3D NAV’ by pressing the key and rotatingN

the outer knob until the satellite status page appears.

The current receiver status is displayed at the top left

of the page.

Section 1

Navigation Key

The GPS 155XL features seven navigation pages to provide various position,

course, speed, status and planning information. The pages may be viewed by pressing

the

key and rotating the outer knob, or by pressing the

key repeatedly.

The NAV summary map, NAVCOM , and position pages are the primary pages

used during in-flight navigation, while the nav menu and status pages offer access to

planning, calculation and status functions. Note that rotating the outer knob clock-

wise will continuously cycle through all the nav pages, whereas turning the knob

counterclockwise will stop the page selection sequence at the NAV summary page.

Whenever the

key pages are in use, the indicator light ( ) next to the U

key will illuminate. If the GPS 155XL requires you to enter data on a navigation page,

a message prompt with specific instructions will appear and the indicator will flash. If

you leave the NAV page sequence for another set of pages, the last NAV page dis-

played will reappear when you return to the nav sequence.

NAV Summary Page

NAV Menu 2 Position Page

NAV Menu 1

Map Page

Satellite Status Page

NAVCOM Page

SECTION

NAV KEY

Overview

The GPS 155XL’s NAV summary page provides you with the important informa-

tion needed to navigate directly to your destination. The destination field, located at

the bottom left of the page, displays the current destination waypoint or active route

leg being navigated. If no direct-to destination, route or approach is being navigated,

the destination field will remain blank.

The (course deviation indicator) at the top of the page shows yourgraphical CDI

position relative to the desired course (the moving D-bar) to the destination way-

point. The in the center of the scale indicates whether you areTO/FROM arrow

heading to (an up arrow) the waypoint or if you have passed the waypoint (a down

arrow). Note that the GPS 155XL always navigates TO a waypoint unless the GPS

SEQ switch is set to the HOLD position, or you have passed the last waypoint in a

route. The default setting of the CDI scale is ‘Auto’. If you are not navigating to a des-

tination, the CDI field will display a ‘No active waypoint’ message, and only speed

and track data will be available. The CDI field is also used to display the GPS 155XL’s

turn anticipation and waypoint alert data during route and approach operations (see

sections 4 and 5).

In addition to displaying your active destination and the course deviation scale,

the NAV summary page features five selectable fields for various distance, direction,

speed and time options. This allows you to configure the NAV summary page to your

preferences. The default settings displayed are distance, ground speed, bearing,

desired track and estimated time enroute. 11

SECTION

NAV KEY

NAV Summary Page

The TO/FROM arrow indicates whether you are

heading to (an up arrow) the waypoint or if you’ve

passed the waypoint (a down arrow).

Destination Field

Ground Speed

Direction

field

Distance

field

Messages

or CDI

Time or Direction Field

Direction

field

‘No Active Waypoint’ appears on the CDI field if

there is no destination waypoint selected using the

D key and no active route.

SECTION

NAV KEY

Configuring the

NAV Summary Page

The following functions may be displayed in the distance field:

• Distance from present position to the ‘active to’ waypoint.dis—

• Steer direction and distance, or digital crosstrack error. An ‘L’ or ‘R’str—

indicates which direction to steer, while the distance value indi-

cates how far you are off course.

The following functions may be displayed in the ground speed field:

• Your present speed over the ground.gs—

• Steer direction and distance, or digital crosstrack error. An ‘L’ or ‘R’str—

indicates which direction to steer, while the distance value indi-

cates how far you are off course.

The following steering functions may be displayed in the direction fields:

• Bearing, the direction from your present position to the waypoint.brg—

• Course to steer to reduce cross track error and re-intercept course.cts—

• Desired track, the course between the active from and to waypoints.dtk—

• Track, the direction of movement relative to the ground.trk—

• Turn, the direction and degrees to turn to get back on course.trn—

The following information can be displayed in the time field:

• Estimated time of arrival (at the active to waypoint).eta—

• Estimated time enroute (to the active to waypoint).ete—

• Track, or the direction of movement relative to the ground.trk—

• vn— Vertical navigation, or VNAV. If VNAV has been activated, this field

indicates either the elapsed time before the VNAV maneuver is to

begin or the VNAV altitude (the suggested altitude you should be fly-

ing in order to complete the maneuver).

WPT 1

STR L

NORTH

WPT 2

BRG

TRK

DIS

AIRPLANE

DTK

To change any of the selectable fields on the NAV summary page:

1. Press

to activate the cursor.

2. Rotate

to highlight the field you would like to change.

3. Rotate

to change the field to display the desired information.

4. Rotate

to highlight another field, or

to finish.

The GPS 155XL’s allows the pilot to define the inbound coursecourse select feature

to, or outbound course from, the ‘active’ waypoint, using an external HSI. Once the

course select function is activated, the selected course will be displayed next to the desti-

nation waypoint identifier and the CDI will provide guidance relative to the desired

course. The course select feature is only available during route, approach or direct-to

navigation. For more information on the course select feature and the GPS SEQ switch,

see Section 5.

To set a desired inbound course:

1. Dial the desired course on the HSI.

2. Set the external GPS SEQ switch to the HOLD position.

3. To stop the course select function, set the GPS SEQ switch back to the AUTO position.

SECTION

NAV KEY

NAV Summary

& Course Select

Selected

Course

Destination

The GPS 155XL’s course select feature uses the

external GPS SEQ switch, allowing you to dial in

the desired course to or from your destination

directly from your HSI.

GPS SEQ

AUTO HOLD

OBS

The next page available from the GPS 155XL’s

key is the . The mapmap page

page displays your present position, using an airplane symbol (in track up mode) or a

position diamond (in other orientation modes), along with nearby airports, VORs,

NDBs, intersections, user waypoints and airspace boundaries. : If the GPS 155XLNote

is unable to determine a GPS position, the present position symbol will not appear on

the map page.

The map display occupies the right side of the display and shows your position

relative to nearby airports, navaids, user waypoints and airspaces. Different symbols

are used to distinguish between waypoint types. The identifiers for any on-screen

waypoints can also be displayed. Special-use and controlled airspace boundaries

appear on the map, showing the individual sectors in the case of Class B or Class C

airspace. The map display can be configured to display airports, navaids, user way-

points, airspaces only at certain scales or these items may be disabled entirely (see page

95). This allows you to de-clutter the map display at larger scale settings.

The map display can be set to 14 different scale settings (from 0.5 to 300 nautical

miles, statute miles or kilometers) during en route operation; while in terminal or

approach mode 12 different scale settings are available (with the two highest en route

scales disabled). The scale represents the top-to-bottom distance covered by the map

display.

SECTION

NAV KEY

Map Page

Data

Fields Present

Position

{

Map Display

Map Scale

The map page, showing airports, airspaces, VORs

and NDBs on the map display.

The map page, showing only airports and air-

spaces on the map display.

SECTION

To select a map scale:

1. Press

ato increase the map scale and show a larger area (or turn

to the right).

2. Press

bto decrease the map scale and show a smaller area (or turn

to the left).

An autozoom feature is available which will automatically adjust from an en route

scale of 300 through each lower scale, stopping at a scale of 1 as you approach your

destination waypoint. The autozoom feature is turned on/off from the map setup page

described on page 97.

The orientation of the map may be fixed at ‘north up’ (nrthup), or set to ‘desired

track up’ (dtk up) or ‘track up’ (trk up). The ‘north up’ setting will keep the top of the

map display fixed on north. ‘Track up’ will cause the map to rotate so the top of the

map is the direction you are heading. ‘Desired track up’ keeps the map display fixed

along your desired course. Map orientation is changed on the map setup page

described on page 97.

Navigation data is also provided on the map page to guide you during your flight.

The destination waypoint name, distance & bearing to waypoint, and desired track

(dtk) appear on the left side of the page. Four additional data fields are located at the

corners of the map display (and may be removed by pressing

), as follows:

Ground speed (gs) - upper left corner

Ground track (trk) - lower left corner

Estimated time en route (ETE) - upper right corner

Map scale - lower right corner (cannot be removed)

NAV KEY

Map Page

To change the map scale press the

key to

increase the scale or

to decrease the scale.

To remove the North indicator and/or data fields

from the map display, press \.

SECTION

The next page available from the GPS 155XL’s

key is the navigation communi-

cations (NAVCOM) page. The NAVCOM page provides a list of the airport frequencies

at your departure and arrival airports, allowing convenient selection of frequencies you’ll

need along your flight path. To scroll through the list of frequencies, rotate the inner

knob (

) in the direction of the arrow prompts at the bottom left of the page.

The frequencies displayed for the departure and arrival airports are listed in the

order you are most likely to use them (see left), with the available frequencies

displayed to the right of the airport identifier. If you do not have an active route with a

departure airport, the NAVCOM page will display the frequencies for the airport nearest

your departure position.

If a frequency has sector or altitude restrictions, the frequency will be followed by a

‘brg?’ indication.

To view restrictions on a frequency:

1. Press

to activate the cursor.

2. Rotate

to highlight the ‘brg?’ next to the frequency you wish to view.

3. Press

to begin viewing restrictions.

The NAVCOM page lists the frequencies for your

departure (or nearest) and arrival airports in the

following order:

Departure Arrival

• Unicom • ATIS

• ATIS • Approach

• Clearance Delivery • Arrival

• Clearance Pretaxi • TCA

• Ground • TMA

• Tower • CTA

• Multicom • ARSA

• Other • TRSA

• Departure • Tower

• TCA • Multicom

• TMA • Other

• CTA • Ground

• ARSA • Unicom

• TRSA

NAV KEY

NAVCOM Page

Once you begin viewing restrictions, you can view any additional frequencies for

the selected airport by rotating

. (Note: An arrow prompt displayed next to the air-

port identifier indicates additional frequencies are available.) You can also view the

other airport information pages by rotating

. Information contained on these pages

is covered in Section 2. To return to the NAVCOM page, press

Some frequencies in the NAVCOM page have tags which designate their usage:

‘tx’ – transmit only ‘rx’ – receive only

‘pt’ – part time frequency

The GPS 155XL displays the graphical CDI along with your presentposition page

latitude and longitude, altitude and a reference waypoint field. The altitude and refer-

ence waypoint fields are selectable to configure the page to your own preferences and

current navigation needs.

An altimeter setting field appears on the position page when you are within 30 nm

of a destination airport. The altimeter setting field allows you to define the current

barometric pressure, which is used by the integrity monitoring to crosscheck altitude.

The altitude field can display either the present altitude, minimum safe altitude

(MSA) or enroute safe altitude (ESA). MSA is the recommended minimum altitude

within a ten mile radius of your present position. ESA is the recommended minimum

altitude within ten miles of your course on an active route or direct-to. MSA and ESA

altitudes are calculated from information contained in the database and generally

include mountains, buildings and other permanent features (see following page). 17

SECTION

NAV KEY

NAVCOM &

Position Pages

NAVCOM page with receive only (rx) frequency

and frequencies with restrictions (brg).

Frequency restrictions on 124.60, showing range

of applicable radials from 130º through 309º.

Altitude, MSA or ESA

Position (lat/lon)

Reference Waypoint Field

{

Altimeter Setting

Field

(user-selectable)

SECTION

To change the altitude field:

1. Press

to obtain a cursor.

2. Rotate

until the ‘alt/esa/msa’ field is highlighted.

3. Rotate

to display the desired data. Press

to return to normal navigation.

The position page also features a reference waypoint field, located at the bottom of

the page, to indicate your bearing and distance from a selected waypoint. The reference

waypoint field can display the following:

• Range, bearing and identifier from the nearest airport (default), VOR, NDB,

intersection, or user waypoint

• Range, bearing and identifier from a user specified waypoint

During DME arc approach operations, the reference field will automatically display

the DME reference as long as the ‘active to’ waypoint is part of the DME arc.

To change the reference waypoint field to display the nearest airport, VOR, NDB,

intersection, user waypoint or the range and bearing from a user selected waypoint:

1. Press

to activate the cursor.

2. Rotate

to highlight the category field after the

3. Use

to choose which waypoint type you would like displayed. (Choose ‘wpt’ if you would

like range and bearing from a specific waypoint to be displayed.)

4. Press

to remove the cursor, or:

If you have selected ‘wpt’:

5. Rotate

to advance the cursor to highlight the identifier field.

6. Use the

and

knobs to enter the identifier name. (This waypoint identifier can be an

airport, VOR, NDB, intersection, or user waypoint.) Press

7. Press

to confirm the selection.

This allows the distance and bearing from any waypoint to be displayed continuous-

ly, which may be useful when an approach reference is not the closest navaid.

Position page displaying the ‘TOP’ VOR as the ref-

erence waypoint. This configuration can be used to

help monitor your distance and radial from a

waypoint of your choice. (Note: the waypoint cate-

gory is listed as ‘wpt’ rather than ‘VOR’ because

the GPS 155XL is not using the nearest VOR.)

The position page displaying MSA. MSA and ESA

are based on data stored in the NavData card.

This information cannot be solely relied upon as

an absolute measure of safe altitude in your area.

Consult current charts and NOTAMS.

NAV KEY

Position Page &

Reference Waypoints

SECTION

To change the DOP/EPE field:

1. Press

and rotate

to display the satellite status page.

2. If the desired field (EPE or DOP) is not displayed, press

3. Use

to change between ‘epe’ and ‘dop’. Press

to finish.

The receiver status field, located on the second line (left side) of the page, will

display the following messages under the appropriate conditions:

Search Sky - The GPS 155XL is searching the sky for visible satellites. You

will be informed with the message ‘Searching the Sky’.

Acquiring - The GPS 155XL is acquiring satellites for navigation.

2D Nav - The GPS 155XL is in 2D navigation mode. If your installation

does not include an altitude serializer, you must enter the alti-

tude manually (see page 2). ‘2D Dif Nav’ will appear when you

are receiving DGPS corrections in 2D mode.

3D Nav - The GPS 155XL is in 3D navigation mode and will compute

altitude. ‘3D Dif Nav’ will appear when you are receiving DGPS

corrections in 3D mode.

Simulator - The GPS 155XL is in simulator mode, which should only be

used for practice and trip planning. use simulator modeNever

for actual navigation.

Poor Cvrge - The GPS 155XL cannot acquire sufficient satellites for navigation.

Need Alt - The GPS 155XL needs altitude in order to start/continue naviga-

tion. Press

to display the position page and enter altitude.

Not Usable - The GPS 155XL is unusable due to incorrect initialization or

abnormal satellite conditions. Turn the unit off and on again.

AutoLocate - The GPS 155XL is looking for any satellite whose almanac has

been collected. This process can take up to five minutes.

‘Searching the Sky’ for satellites. No satellite

almanac data exists in the GPS 155XL. It must

be recollected from the first available satellite.

‘Acquiring’ satellites for navigation. In this case,

the satellites are being received, but the data is

still being collected before a position can be

determined.

NAV KEY

Receiver

Status Field

SECTION

Viewing individual satellite information.

NAV KEY

Satellite Data Page

The third and fourth lines of the satellite status page provide the satellite number

and signal strength of each satellite in view. The satellite status page shows signal

strength for up to eight satellites at a time. If additional satellites are being received

an arrow on the ‘sat’ line will indicate additional data is available.

To view additional satellites:

1. Rotate

to view more satellites.

Additional information regarding each satellite’s azimuth, elevation and other data

is also available.

To view individual satellite information:

1. Press

and use

to display the satellite status page.

2. Press

to activate the cursor.

3. Use

to highlight the satellite number you wish to view and press

This will display the satellite data page, showing the selected satellite’s number,

elevation angle, rise or fall indication, User Range Accuracy (URA, or the range

measurement accuracy as determined by the satellite), azimuth and signal strength.

To view other satellites:

4. Rotate

to view information for the next satellite.

5. Rotate

and press

on the satellite status page when you are finished.

In addition to the five other navigation pages, the GPS 155XL features two menu

pages to perform a host of planning and navigation functions. NAV Menu 1 provides

access to the following functions:

• Trip Planning • Density altitude/true airspeed calc.

• Fuel Planning • Winds aloft calculations

• VNAV Planning • Checklists

To display NAV Menu 1:

1. Press

2. Rotate

until NAV Menu 1 is displayed.

Trip Plan is the first function listed on NAV Menu 1 and allows the pilot to view

distance, ESA, bearing and estimated time enroute (ETE) between any two waypoints,

and for programmed route legs. The ground speed can be varied manually to calcu-

late several possible ETEs.

To use the trip planning function:

1. Press

and rotate

until NAV Menu 1 is displayed.

2. Press

, then

to access trip planning.

3. Rotate

to select waypoint mode or desired route number and press

4. For direct-to navigation, use

and

to enter the ‘to’ and ‘from’ waypoints. Press

to accept the waypoints. To use your present position as a waypoint, leave the way-

point field blank.

5. For route calculations, choose either ‘cum’ for cumulative data (from beginning to end) or

the leg desired by rotating

6. Use

and

to enter the ground speed. Press

to calculate the values and

to finish.

SECTION

Trip planning with values calculated between two

waypoints.

NAV Menu 1

NAV KEY

NAV Menu 1

Trip Planning

SECTION

To perform fuel planning operations:

1. Press

and rotate

until NAV Menu 1 is displayed.

2. Press

and rotate

until ‘Fuel Plan?’ is highlighted. Press

3. Rotate

to select either ‘wpt’ for direct navigation or the desired route number. Press

4. For waypoint-waypoint navigation, use

and

to enter the ‘to’ and ‘from’ waypoints.

Press

to accept the waypoints. To use the present position as a waypoint, leave the

corresponding waypoint field blank.

5. For route calculations, choose either ‘cum’ for cumulative route fuel requirements

(from beginning to end) or the leg desired by rotating

If leg is selected, it displays the amount of fuel required to fly until that leg is complete.

For example: The fuel required to complete leg 2 is leg 1 + leg 2.

Fuel required to complete leg 4 is leg 1 + leg 2 + leg 3 + leg 4.

6. Rotate

to advance the cursor to ‘fob:’ or ‘gs:’ (depending on which is displayed).

7. Use

and

to enter the fuel on board or the ground speed. Press

8. Rotate

back two positions to highlight the ‘fob:’ or ‘gs:’ field again.

9. Rotate

to display the other information. Press

10. Use

and

to enter the remaining data. Press

11. Use

and

to enter the flow rate, in units per hour, if needed. Press

The GPS 155XL will calculate the range and endurance (i.e., how long the fuel

will last) of your aircraft. These are found in the first field on the bottom row of the

page. The amount of fuel left on board (lfob) and reserve time after the selected

direct-to, leg or route is flown are displayed in the second field on the bottom row.

Fuel planning page with other information

indicating ‘endurance’ and ‘reserve’ times.

Fuel planning page showing calculations between

two waypoints.

NAV KEY

NAV Menu 1

Fuel Planning

You will now notice that the vertical speed has been calculated, based on your

present speed. If you desire a more rapid climb or descent rate:

8. Use

and

to enter the new desired vertical speed, or press to accept theE

calculated value.

9. Press

to activate the vertical navigation function.

If you enter a value greater than the value computed by the GPS 155XL, the time

remaining before the maneuver is to begin will be displayed. When the countdown reaches

15 seconds, you will be informed with the message ‘Start altitude chng’. The VNAV func-

tion will automatically be cancelled if the active direct-to or route is changed in any way,

and you will be informed with a ‘VNAV cancelled’ message.

The GPS 155XL will allow you to create up to nine with 30 items eachchecklists

to remind you of repetitive tasks (that can be called up at any time for review). The

checklist feature is useful for creating pre-flight checklists, landing checklists, emergency

procedures, etc. Each name or function can have up to 16 characters each.

To create a checklist:

1. Press

and rotate

until NAV Menu 1 is displayed.

2. Press

and rotate

until ‘Chklist?’ is highlighted. Press

3. Press

and use

to highlight the checklist you would like to create or edit.

Press

4. Use

and

to enter the title of the checklist. Press

This will display the checklist items page. On this page you can enter each task,

such as ‘Check Fuel’.

5. Use

and

to enter the checklist item. Press

6. You may repeat step 5 to enter additional items, or press

to finish.

SECTION

Checklist catalog page.

VNAV displayed on NAV summary page. The

VNAV altitude should be compared with the read-

ing on the aircraft altimeter to ensure you are on

the proper climb/descent angle.

NAV KEY

NAV Menu 1

VNAV & Checklists

SECTION

To execute a checklist:

1. Press

and rotate

until NAV Menu 1 is displayed.

2. Press

and rotate

until ‘Chklist?’ is highlighted. Press

3. Use

to highlight the checklist you would like to see. Press

4. Press

to check off list items.

To delete a checklist item or an entire checklist:

1. To delete a checklist item, highlight the desired item and press

, followed by

2. To delete an entire checklist, highlight the desired list and press

, followed by

The GPS 155XL’s NAV Menu 2 provides access to various timer and planning func-

tions, including:

• • Approach timer Clock (Date and time)

• Trip Timer RAIM Prediction•

• • Scheduler messages Sunrise and sunset calculations

The approach timer acts as either a count up or a count down timer that can be

set or reset at any time.

To activate/change/view the approach timer:

1. Press

and rotate

until NAV Menu 2 is displayed.

2. Press

and rotate

until ‘Appr Time?’ is highlighted. Press

3. Rotate

to select either ‘Count up’ or ‘Count down’. Press

4. Use

and

to set the time to begin counting from. Press

5. Rotate

to select the desired function: ‘Start’, ‘Stop’, or ‘Reset’. Press

to execute.

NAV Menu 2

NAV KEY

Checklists

Approach Timer

Executing a checklist.

SECTION

When the countdown timer reaches zero, you will be informed with a ‘Timer

expired’ message. The timer will then begin to count up, displaying the time since it

expired. The timer runs, if not altered, whenever the GPS 155XL is turned on.

The GPS 155XL keeps track of both UTC time (Greenwich Meanclock function

Time or Zulu Time calculated from the satellites) and local time, and allows you to

designate which format to use in all time displays. The local time and date can be set

without displaying local time on other GPS 155XL pages.

To set the local date/time:

1. Press

and rotate

until NAV Menu 2 is displayed.

2. Press

and rotate

until ‘Clock?’ is highlighted. Press

3. Use

to select either ‘utc’ or ’local’ time to be displayed in the time fields. Press E.

4. Use

and

to set the local date. Press

5. Use

and

to set the local time. Press

6. Press

to complete.

The GPS 155XL’s will automatically keep track of the duration of yourtrip timer

current trip and can be configured to run when the GPS 155XL is on, or only when your

ground speed exceeds a specified value (see Section 6).

To view or reset the trip timer:

1. Press

and rotate

until NAV Menu 2 is displayed.

2. Press

and rotate

until ‘Trip Time?’ is highlighted. Press

. The current time of

day, departure time and time enroute will be displayed.

3. To reset the timer, press

. To skip resetting the timer, press

To reset the trip timer, highlight ‘Reset?’ and

press E.

Clock function set to display local time in the time

fields of all other GPS 155XL pages.

NAV KEY

Clock Function

Trip Timer

SECTION

Enter the location, time and date for RAIM pre-

diction.

NAV KEY

RAIM Prediction

RAIM available for the entered time, date and

waypoint location.

The RAIM Prediction function allows you to confirm that GPS coverage is

available for your current location or at a specified waypoint any day of the year.

R A I Meceiver utonomous ntegrity onitoring performs checks to ensure that the GPS

155XL will have adequate satellite geometry to work with during your flight. RAIM

availability will be near 100% in Oceanic, En route and Terminal phases of flight.

Because the FAA’s TSO requirements for non-precision approaches specify significant-

ly better satellite coverage than other flight phases, RAIM may not be available when

flying some approaches. The GPS 155XL will automatically monitor RAIM during

approach operations and warn you if RAIM is not available. RAIM prediction will

help you plan for a pending flight to confirm GPS operation during an approach.

To predict RAIM availability:

1. Press

and rotate

until NAV Menu 2 is displayed.

2. Press

and rotate

to highlight ‘RAIM Prd?’. Press

3. Rotate

to highlight the field which you would like to change.

4. Use

and

to enter the waypoint name, or leave it blank to use your current

position. Press

to accept.

5. Use

and

to enter the ETA in hours and minutes (in local or UTC time, whichever

you have selected from the clock display), and the day, month and year. The current date

will be displayed automatically. Press

to accept.

6. Rotate

to highlight ‘Compute RAIM?’.

7. Press

to compute information.

When the computations are complete, the GPS 155XL will display whether or not

RAIM is available for the specified waypoint at the specified date and time, +/- 15

minutes of your ETA. Refer to the table on page 99 for specific RAIM protection

limits as they relate to CDI scale figures.

SECTION

The scheduler function will display reminder messages (such as ‘Change oil’, ‘Switch

fuel tanks’, ‘Overhaul’, etc) after a specified time has elapsed. For example, if you enter

‘Change oil’ to be displayed in 30 hours, the message ‘Change oil’ will be displayed after the

GPS 155XL has been running in Normal mode for 30 hours. After appearing, the message

will be displayed each time the GPS 155XL is turned on until it is changed or deleted.

To enter a scheduled message:

1. Press

and rotate

to display NAV Menu 2.

2. Press

and rotate

until ‘Scheduler?’ is highlighted.

3. Press

4. Rotate

to highlight the message you would like to edit. To delete, press

then

5. Use

and

to enter the message. Press

6. Use

and

to set the time to elapse before the message is displayed, in hours and

minutes, up to 99 hours and 59 minutes (this time is cumulative and counts whenever

the GPS 155XL is on in Normal operating mode).

7. Press

You may edit another scheduled message by repeating steps 4, 5, 6 and 7 or if you

are finished, press

The scheduled message will appear after the timer

expires and reappear every time the GPS 155XL

is powered on until the message is changed.

The scrolling arrow prompt indicates which direc-

tion to scroll to view additional listings.

NAV KEY

NAV Menu 2

Scheduler

SECTION

Sunrise/sunset planning page showing UTC (Zulu)

sunrise and sunset times for ‘KROG’.

NAV KEY

Sunrise/Sunset

Calculations

The GPS 155XL’s allows you to calculate the timesunrise/sunset planning function

of sunrise or sunset at any waypoint or your present position for a specified date.

To calculate sunrise and sunset times at a waypoint or at your present location:

1. Press

and rotate

until NAV Menu 2 is displayed.

2. Press

and rotate

to highlight ‘Sunrise?’. Press

3. Use

and

to enter the waypoint identifier, or leave blank to use current position.

Press

4. Press

to accept the waypoint information.

5. Use

and

to enter the date desired.

6. Press

and the sunrise and sunset times will be calculated and displayed. The times

will be displayed in your local time or UTC time, whichever is specified from the clock

function on NAV Menu 2.

Section 2

Waypoint and Database Information

The GPS 155XL uses a Jeppesen NavData® card to provide position and facility

information for thousands of airports, VORs, NDBs and intersections. Each facility in the

database is stored as a waypoint with its own latitude/longitude, identifier (up to five let-

ters and/or numbers), and other pertinent information. Up to 1,000 user waypoints may

also be created and stored in the GPS 155XL’s internal memory.

Waypoint information is available through four primary waypoint pages accessible

from the GPS 155XL’s

key. The waypoint pages may be scrolled through by pressing

the

key and rotating the outer knob until the desired page is displayed, or by press-

ing the

key repeatedly.

SECTION

WPT KEY

Overview

Please note that your GPS 155XL uses ICAO

identifiers for all airports. All U.S. airport identifiers

which contain only letters use the prefix ‘K’. For

example, Los Angeles International is KLAX under

the ICAO standard. Other airports, such as Otten

Memorial (3VS), that contain numbers in the

identifier do not require the ‘K’ prefix. Many foreign

countries use two letter prefixes. For more

information on ICAO identifiers, contact:

Document Sales Unit

International Civil Aviation Organization

999 University Street

Montreal, Quebec

Canada H3C 5H7

Waypoint Menu Page Proximity Waypoints Page

Waypoints With Comments List User Waypoint List

SECTION

The waypoint menu page allows you to select the

desired waypoint type (or category).

WPT KEY

Waypoint Categories

& Menu Page

The airport position page shows the position,

field elevation and available fuel types for the

selected airport.

The GPS 155XL organizes waypoints into one of five waypoint categories for your

convenience. Each waypoint category provides different types of detailed information

for a selected facility:

• Identifier, city/state, country, facility name, position (lat/lon),Airports -

elevation, fuel services, control and approach information, IFR proce-

dures, runways and communication frequencies.

• Identifier, city/state, country, facility name, position (lat/lon),VORs -

frequency, magnetic variation, co-located DME or TACAN and weather

broadcast indication.

• Identifier, city/state, country, facility name, position (lat/lon),NDBs -

frequency and weather broadcast indication.

• Identifier, country, position (lat/lon) and nearest VOR.Intersections -

• Identifier (name), position (lat/lon) and reference waypoint.User -

To view detailed waypoint information for a desired waypoint, select the appro-

priate waypoint category from the waypoint menu page.

To choose a waypoint category (for viewing information):

1. Press

and rotate

to display the waypoint menu page. (If pressing

once

does not display the waypoint menu page, press

a second time.)

2. Press

and rotate

to highlight the desired waypoint category.

3. Press

to accept the waypoint category. The waypoint identification or position page

for the selected category will appear with the waypoint identifier field ready for entry.

SECTION

After a waypoint category is selected, information for a waypoint may be viewed

by entering the identifier or name of the desired waypoint. Airports, VORs and NDBs

may be entered by either the identifier, name or the location (city) of the facility.

Intersections and user waypoints must be entered by the identifier.

To enter a waypoint identifier:

1. With the cursor over the waypoint field, use

and

to enter the

waypoint identifier.

As the identifier is entered, the GPS 155XL’s Spell’N’FindTM feature will scroll

through the available database, displaying those waypoints matching the identifier let-

ters you have entered to that point. When the desired waypoint is displayed, press

to remove the cursor.

To obtain waypoint information by entering the facility name of the airport or

navaid, or its location:

1. Press

and rotate

to display the waypoint menu page.

2. Press

and rotate

to highlight the desired waypoint category.

3. Press

to accept the waypoint category.

4. Rotate

to highlight the middle field to enter location (city) OR:

Rotate

to highlight the bottom field to enter facility name or VOR/NDB name.

5. Use

and

to enter the location or the name, and press

to finish.

As the information is entered, the GPS 155XL will display any entries in its data-

base that match the letters you have entered. If duplicate entries exist for the entered

identifier, name or location, additional entries may be viewed by rotating

. Once

the desired waypoint is displayed, press

to continue.

Entering a waypoint by city. Note that punctua-

tion marks are not used when entering locations

or names. Use spaces, where appropriate, to iden-

tify these marks. For example, St. Louis would be

entered as “ST LOUIS” without a period.

Entering a waypoint by identifier.

WPT KEY

Entering Waypoints

Once a waypoint category and identifier have been selected, the GPS 155XL will

provide extensive information through a set of waypoint pages for the selected cate-

gory. The pages available for each waypoint category are presented here in the order

they appear on the waypoint menu page: airports, VORs, NDBs, intersections and

user waypoints.

Airport Information

To scroll through the airport pages:

1. Make sure the cursor is not present. If it is, press

2. Rotate

in either direction to scroll through the available pages.

SECTION

If the city or facility name information is too long

to fit the screen, the name will scroll across the

page every few seconds so the complete name can

be read.

WPT KEY

Airport Information

The airport position page shows the position,

field elevation and available fuel types for the

selected airport.

Airport Position Page

Airport Identification Page

Airport Comments Page

Airport Runway Page

Airport Communication Page

Airport Procedures Page

The GPS 155XL features six airport pages:

airport identification— allows entry of desired airport by identifier,

facility name or city; displays region and/or country of facility.

airport position— allows entry of desired airport by identifier; displays

latitude, longitude and elevation; indicates usage and fuel availability;

displays available approaches and airport control/radar capability.

airport procedures— allows entry of desired airport by identifier; dis-

plays all available approaches, SIDs and STARs at the selected facility.

airport communication— allows entry of desired airport by identifier;

displays radio frequencies/usage, and sector and altitude restrictions.

airport runway— allows entry of desired airport by identifier; indicates

runway designations, length, surface and lighting information; displays

ILS/localizer and/or pilot-controlled lighting frequencies.

airport comments— allows entry of desired airport by identifier; displays

user comments for the selected airport.

The displays a selected airport’s identifier, region andairport identification page

country, city/state and facility name. The identification page is always the first airport

page available, allowing you to quickly review an airport facility or select another

facility by entering the identifier, facility name or city of the desired airport.

SECTION

Airport runway page. The down arrow next to

the identifier indicates additional runways may be

displayed by rotating the K knob.

Airport communication page. The down arrow

next to the identifier indicates additional frequen-

cies may be displayed by rotating the K knob.

WPT KEY

Airport Pages

Waypoint Type

and Identifier Region/Country

Location

(city/state)

Facility Name

{

CDI

SECTION

WPT KEY

Airport

Position Page

1 2 3

The airport position page displays the latitude, longitude and elevation of the

selected airport, as well as usage or fuel availability, available approaches and airport

control/radar capability. The following descriptions and abbreviations are used on the

airport position page:

Elevation— In feet or meters

Usage/Fuel— If the airport is for military use, it will display ‘military’.

If it is private, the GPS 155XL will display ‘private’. If it is a

public airport, it will display the fuel type(s) available:

• 80-87 octane, 100 LL, 100-130 octane, or mogas isav gas—

available

• jet— Jet A, Jet A-1 or Jet A+ fuel is available

• Both av gas and jet fuel are availableav/jet—

Position— In degrees/minutes or degrees/minutes/seconds of latitude

and longitude

Approach Information— displays the airport approaches available

• No approach is availableno apr—

• Non-precision approach is availablenp-apr—

• Localizer approach is availableloc—

• ILS approach is availableils—

Controlled Airspace Information— displays controlled airspace type

• class B • cta

• class C • tma

Radar— displays approach/departure radar capability

• indicates radar is presentradar—

Airport Position Page

1. Identifier (selectable)

2. Elevation

3. Fuel Availability

4. Airport Position

5. Approach Information

6. Controlled Airspace/Radar Capability

Airport communications page for KCLT.

Frequency page with sector restrictions.

The airport communication page displays the radio frequencies and usage for

the selected airport, as well as sector and altitude restrictions.

To view the communication page from any of the airport information pages:

1. Rotate

with the cursor removed to display the communication page.

2. Rotate

in the direction of the arrow prompt to view additional frequencies. You may

also view additional frequencies with the cursor on the page by rotating the

knob.

The following descriptions and abbreviations are used on the communication page:

Frequencies without restriction information:

• Automatic terminal information service (ATIS)ats -

• ptx - Pre-taxi

• Clearance deliveryclr -

• gnd - Ground

• twr - Tower

• uni - Unicom

• mul - Multicom

• Aerodrome traffic frequencyatf -

• Common traffic advisory frequency (CTAF)ctf -

• Mandatory frequencymf -

• Other frequenciesoth -

Frequencies with restriction information:

• Departure • dep - apr - Approach

• Arrival • arv - class B

• ICAO control area • ICAO terminal control areacta - tma -

• • Terminal radar service areaclass C trsa -

‘Receive only’ frequencies will be followed by an ‘rx’ indicator, while ‘transmit

only’ frequencies will display a ‘tx’. If a frequency has sector and/or altitude restric-

tions, they will also be displayed. Sector restrictions define a range of radials from the

facility, while altitude restrictions may describe an area above, below or between

altitudes. Additional instructions, if available, will be displayed on the bottom line. 39

SECTION

WPT KEY

Airport

Communications Page

WPT KEY

VOR Information

SECTION

VOR position page showing co-located TACAN

facility and weather broadcast.

VOR identification page

VOR Information

The GPS 155XL features three VOR waypoint pages:

VOR identification— allows entry of desired VOR by identifier,

facility name or city; displays region and/or country of facility.

VOR position— allows entry of desired VOR by identifier; displays

latitude, longitude and frequency; provides magnetic variation, weather

broadcasts and DME/TACAN information.

VOR comments— allows entry of desired VOR by identifier; displays user

comments for the selected facility.

VOR information is accessed by entering the desired facility by identifier, city or

facility name (see page 34) on any VOR waypoint page. The VOR identification and

comments pages are identical in form and function to their airport page counterparts.

To scroll through the VOR pages:

1. Make sure the cursor is not present. If it is, press

2. Rotate

in either direction to scroll through the available pages.

In addition to displaying the VOR frequency, magnetic variation and position, the

VOR position page indicates if a DME or TACAN is co-located at the facility. The ‘wx

bdcst’ field indicates that the VOR also transmits weather information.

NDB comments page

NDB identification page

SECTION

WPT KEY

NDB Information

The GPS 155XL also uses identification, position and comments pages for NDB

information. The NDB waypoint pages are used in the same manner as VOR pages:

NDB information is accessed by entering the desired facility’s identifier, city or name

(see page 34) on the NDB identification page.

To scroll through the NDB pages:

1. Make sure the cursor is not present. If it is, press

2. Rotate

in either direction to scroll through the available pages.

The NDB position page (see above) displays the selected facility’s identifier, fre-

quency and position, as well as any weather broadcasts available. The NDB comment

page will display any user comments for the selected NDB (see page 50 for instruc-

tions on entering user comments).

NDB Position Page

WPT KEY

Intersection

Information

SECTION

Intersection comments page

Intersection Information

The last database waypoint category available is intersections. Two intersection

pages are available: intersection position and intersection comments. Intersections

may be entered by identifier only (not city or name) on either intersection page.

To scroll through the intersection pages:

1. Make sure the cursor is not present. If it is, press

2. Rotate

to toggle between the available pages.

The intersection position page displays the selected facility’s identifier, region and/or

country, latitude and longitude, and the identifier, distance and bearing to the nearest

VOR (not necessarily the VOR used to define the intersection). The intersection com-

ment page will display any user comments for the selected intersection (see page 50).

Intersection Position Page

User waypoint comments page

User waypoint page

WPT KEY

User Waypoints

SECTION

User Waypoint Information

In addition to the airport, VOR, NDB and intersection waypoints contained in your

NavData® card, the GPS 155XL allows you to store up to 1,000 user-defined way-

points. Once a user waypoint is created, two user waypoint pages will display the fol-

lowing information:

• Waypoint identifier

• Position in latitude and longitude

• Identifier, range and bearing from a reference waypoint

• User comments

To scroll between the user waypoint position page and the user comments page,

rotate

. User waypoints may be created or modified using the

key. After select-

ing the waypoint identifier, as shown on page 34, you will be prompted to enter infor-

mation if the waypoint is new. There are three ways to create a user waypoint’s posi-

tion from the

key:

1. Enter the exact position of the new waypoint.

2. Reference a known waypoint by range and bearing.

3. Enter a range and bearing from your current position.

To create or edit a user waypoint:

1. Press

2. Press

and use

to highlight the ‘user?’ field. Press

3. Use

and

to enter the waypoint identifier. Press

SECTION

WPT KEY

Creating

User Waypoints

Selecting a method to enter a new user waypoint.

Entering the user waypoint’s exact position.

If the waypoint identifier entered does not exist, you will be prompted to select a

method to enter the new waypoint’s position into memory. If the waypoint exists (i.e.,

you’re just reviewing or editing a user waypoint), skip step 4 and move on to the next

set of instructions.

4. Select the desired waypoint entry method using

and press

You will automatically be placed on the latitude and longitude field (if you

selected ‘enter posn?’), the ‘from’ field (if you select ‘ref wpt?’) or the ‘bearing’ field (if

you select ‘rng/brg from posn?’).

To enter/edit the position of the user waypoint:

1. Use

and

to enter the latitude. You may select either north or south and enter a

latitude up to (but not including) 90°.

2. Press

3. Use

and

to enter the longitude. You may select either east or west and enter a

longitude up to (but not including) 180°.

4. Press

Once the latitude and longitude have been entered, the cursor will move to the

reference waypoint field, where you may enter a reference waypoint to calculate a

bearing and distance to the new waypoint position. If you are not entering a reference

waypoint:

5. Press

to advance the cursor to the ‘ok?’ prompt and press

to save the new

waypoint in internal memory.

WPT KEY

Reference

Waypoints

SECTION

Creating a user waypoint by referencing another

waypoint.

To create a user waypoint from your present posi-

tion, leave the reference waypoint field blank and

enter a bearing and distance from your present

position. The GPS 155XL will calculate the new

waypoint’s coordinates automatically.

To enter/edit a user waypoint position from a reference waypoint:

1. Use

and

to enter the reference waypoint’s identifier.

2. Press

. The waypoint’s position will appear.

3. Use

and

to enter the bearing from the reference waypoint.

4. Press

5. Use

and

to enter the distance from the reference waypoint.

6. Press

. The latitude and longitude will be calculated for the waypoint.

7. Press

to confirm the ‘ok?’ prompt and save the waypoint position.

If you have chosen to create a waypoint at a certain bearing and distance from

your current position, your current position will be displayed and you will enter the

bearing and distance at which you would like the new waypoint to be located.

To create a user waypoint offset from your present position:

1. Use

and

to enter the bearing from your position.

2. Press

3. Use

and

to enter the distance from your position.

4. Press

. The latitude and longitude will be calculated for the new waypoint.

5. Press

to confirm the ‘ok?’ prompt and save the waypoint position.

WPT KEY

Creating Waypoints

with AutoStore

SECTION

AutoStore waypoint with default name.

The default waypoint name may be changed

before saving the waypoint.

The GPS 155XL’s AutoStoreTM function provides another method of creating user

waypoints. AutoStore is used to instantly capture your present position as a user way-

point with a touch of a button and add the new waypoint to the end of a specified

route, if desired.

To perform an AutoStore:

1. Press

and rotate

to display the position page or map page.

2. Press

This will display the ‘Save waypoint’ screen, which will allow you to rename the

waypoint and choose the route to which it should be added. The GPS 155XL will

assign the next available three-digit number as the default waypoint name, preceded

by a ‘+’ sign. This will help you differentiate AutoStore waypoints from other user

waypoints.

To change the default name or route of an AutoStore waypoint:

1. Rotate

to select the name or route number field.

2. Use

and

to enter the name or route number. If you do not want to add the way-

point to a route, be sure to keep the route field blank.

3. Press

to accept.

4. Press

to confirm the ‘ok?’ prompt.

If the waypoint name you entered is already assigned to another waypoint, you

will be informed with the message ‘WPT exists ______’. The default waypoint name

will be redisplayed, and you may enter a different name. The new waypoint will only

be added to a route if the desired route number is manually entered in the route field.

WPT KEY

Proximity

Waypoints

SECTION

Proximity waypoints page

Proximity alarm message. Pressing Nwill

display the position page with the bearing and

distance from the proximity waypoint indicated

on the bottom line.

The second page available from the GPS 155XL’s

key is the proximity

waypoints page. This page allows you to define an alarm circle around a selected

waypoint and is useful in defining alarm circles around towers or obstructions. Up to

nine proximity waypoints can be entered, each with an alarm radius of up to 99.9 nm.

To create or edit a proximity waypoint:

1. Press

and use

to display the ‘Proximity waypoints’ page.

2. Press

and use

to highlight the first available field.

3. Use

and

to enter the identifier. It may be an airport, VOR, NDB, intersection or user

waypoint. Press

4. Use

and

to enter the radius of the alarm circle. Press

If two proximity waypoints are entered and their regions overlap, you will be

informed with the message ‘Proximity overlap’. This message will be displayed each

time you turn on the GPS 155XL for as long as the overlap remains. Warning: If you

enter the overlap area you will only be informed of the nearest proximity waypoint.

To remove a waypoint from the proximity waypoints page:

1. Press

, if necessary, to obtain a cursor.

2. Press

to erase the name, and then

to delete.

To scroll through the proximity waypoints list:

1. Rotate

with the cursor inactive (or use

with the cursor active) to scroll through the

available proximity waypoints. The arrow prompt will indicate the direction to scroll to view

additional waypoints, if available.

WPT KEY

User Waypoint

List

SECTION

User waypoint list showing the current active-to

waypoint and a proximity waypoint.

Renaming a user waypoint.

The third page available from the GPS 155XL’s

key is the user waypoint list,

which can be used to quickly scan, review, rename or delete user waypoints.

To display the user waypoint list:

1. Press

and use

to display the user waypoint list.

2. To scroll through the list, rotate

The total number of user waypoints is displayed at the top of the page, with the

individual user waypoints listed two at a time in alphabetical order below. The arrow

prompt, located at the top left of the page, will indicate which direction to scroll to

view additional waypoints. The status of each waypoint will be displayed to the right

of the identifier when it is the active-to waypoint, part of an active or stored route or

a proximity waypoint. To edit, rename or delete waypoints, the cursor must highlight

the desired waypoint.

To highlight a waypoint:

1. Press

and use

to highlight the desired waypoint.

To edit a highlighted waypoint’s position:

1. Press

to obtain the waypoint position page. Edit the waypoint position as described on

page 45. ( : The active-to waypoint cannot be edited.)Note

To delete a waypoint from the list:

1. Highlight the desired waypoint and press

. Press

to confirm the deletion.

To rename a waypoint from the list:

1. Highlight the desired waypoint. Use

and

to enter a new

identifier for the waypoint.

2. Press

on the confirmation page to change the name, or press

to cancel.

WPT KEY

Waypoint

Comments

SECTION

Entering waypoint comments

Waypoints with comments page

The last page available through the GPS 155XL’s

key is the waypoints with

comments page, which lists all waypoints that have a user comment. User com-

ments may be added to 250 waypoints stored in the user or NavData®database, and

allow you to note two lines of special information concerning a particular waypoint.

To enter user comments:

1. Enter the waypoint identifier from any waypoint page (see page 34), and press

remove the cursor.

2. Rotate

to display the ‘comments’ page.

3. Press

and use

to highlight either the second or third line.

4. Use

and

to enter the comment.

5. Press

to accept, and repeat steps 4 and 5, if necessary, to enter information on the

other line.

6. Press

to remove the cursor.

To view the ‘waypoints with comments’ list:

1. Press

and use

to display the ‘Wpts with comments’ page.

2. Use

to scroll through the list.

The GPS 155XL will display the waypoints with comments in alphabetical order,

with up to six waypoints at a time. The scrolling arrow prompt will indicate which

direction to scroll to view additional waypoints.

To view comments for a selected waypoint:

1. Highlight the desired waypoint and press

(or press

and

to delete).

2. Rotate

to display any other available pages for the selected waypoint.

WPT KEY

Locked Waypoints

Waypoint Scanning

SECTION

Possible messages for locked waypoints.

To blank a waypoint field, highlight the field and

press the \key.

Because the GPS 155XL relies on a NavData card for most waypoint information,

there may be instances when waypoint information is not available for use. Locked

waypoints exist when a waypoint contained in a route, used as a proximity waypoint

or with a comment, is not contained on the NavData card, or no card is inserted in

the unit. If this condition exists, you’ll be alerted with a ‘Proximity wpt locked’,

‘Route wpt locked’ or ‘Wpt comment locked’ message when the unit is powered up.

The identifier of a locked waypoint will be replaced with a ‘lockd’ message, which

indicates you cannot obtain waypoint information or navigate to the waypoint. The

identifier of a locked waypoint may be displayed by highlighting ‘lockd’ and pressing

. Locked waypoints may be deleted from routes, the proximity waypoints list or

waypoints with comments page by following the instructions in the appropriate

section of this manual.

The waypoint scanning feature provides a fast way to scan through airports,

VORs, NDBs and intersections in the database by identifier, facility name or city.

Waypoint scanning may be used from any blank waypoint identifier field.

To enter a waypoint by scanning the identifier, facility name or city:

1. With the cursor over a blank identifier field, press

. If the identifier field is not blank,

highlight the field with the cursor and press

before pressing

2. Use

to highlight the waypoint category you wish to scan.

3. Press

to activate the scanning mode.

4. Rotate

to place the cursor over the field you want to scan (identifier, facility or city

name).

5. Use

and

to enter the letters of the identifier, city or facility name. The GPS 155XL

will scan the database and display the first waypoint that matches your entry.

6. Press

to accept the waypoint, and

again to confirm the waypoint for the

function being used.

SECTION

NRST KEY

Overview

Nearest airport with other frequency information.

If an airport has multiple frequencies available,

they may be quickly viewed without activating

the cursor by pressing the key repeatedly.\

Nearest FSS page. To view additional frequencies

(if available), highlight the frequency and rotate

the O knob.

Section 3

Nearest Waypoints

The GPS 155XL’s

key provides detailed information on the nine nearest airports,

VORs, NDBs, intersections and user waypoints within 200 nm of your current position. In

addition, it will display the two nearest Flight Service Station (FSS) and center (ARTCC/

FIR) points of communication, plus alert you to any Special Use Airspace (SUA) you may

be in or near. The

key can be used in conjunction with the GPS 155XL’s direct-to

function to quickly set a course to a nearby facility in case of an in-flight emergency.

To view the nearest waypoint information:

1. Press

This will display the airport nearest to your present position, subject to the runway

surface type and minimum runway length selected (see page 100).

To scroll through the next eight nearest airports, rotate

You may examine both the communication frequencies and the runway information

directly from the nearest airport page.

To view more comm/runway information:

1. Press

and rotate

to highlight the comm field or the runway field.

2. Rotate

to scroll through more information, if available.

To perform a direct-to on any of the nearest waypoint pages:

1. Press

. The waypoint confirmation page will appear.

2. Press

to accept the waypoint or

to cancel.

NRST KEY

Special

Use Airspace

SECTION

NOTE: The GPS 155XL will flash the

next to the

key

to inform you of SUA alerts. You do not have to repeatedly

check the Nearest Waypoint page for SUA information. It is

provided to supply more information on the SUA and its

boundaries. The GPS 155XL will not flash alerts, however, if

it has been turned off or if your altitude is such that you will

not enter the buffered airspace. Turning off SUA alerts and

setting the altitude buffer is described on page 105.

The nearest waypoints for other categories (VORs, NDBs, etc.) may be viewed

by rotating

. Rotating

continuously to the left will stop page selection on the

nearest airport category.

The next page available under the GPS 155XL’s

key is the SUA (special-use

airspace) alert page. The SUA alert page will alert you to as many as nine controlled or

restricted airspaces near or in your flight path, according to the following conditions:

• If your projected course will take you inside an SUA within the next 10

minutes, the message ‘ ’ will be displayed.SUA ahead < 10 min

• If you are within two nautical miles of an SUA and your current course will take

you inside, the message ‘ ’ will be displayed.SUA near & ahead

• If you are within two nautical miles of an SUA and your current course will not

take you inside, the message ‘ ’ will be displayed.Near SUA < 2nm

• If you have entered an SUA, the message ‘ ’ will be displayed.Inside SUA

Note that the GPS 155XL’s SUA alerts are based on three-dimensional data (latitude,

longitude and altitude) to avoid nuisance alerts. The alert boundaries for controlled air-

space are also sectorized to provide complete information on any nearby airspace. Once

you have met one of the described conditions, the message annunciator will flash, alert-

ing you of an SUA message.

To view an SUA message:

1. Press the

key.

2. Press

again to return to the previous page.

Once you are notified of an SUA alert, detailed information concerning the specific

SUA is provided by the

key.

Nearest SUA

Nearest SUA with controlling agency displayed.

NRST KEY

Special

Use Airspace

SECTION

To view the SUA alert page:

1. Press the

key.

2. Rotate

one stop to the right to view the SUA alert page.

The SUA alert page contains the following information:

The ‘SUA number’ field displays which SUA you are viewing (you may be alerted to up

to nine SUAs). SUAs are ranked with ‘sua1’ being the highest priority, and ‘sua9’ being the

lowest priority from your current position. The ‘SUA alert’ field displays the corresponding

alert message for this SUA, such as ‘near’, ‘near & ahead’, etc. (see page 54). The ETE (esti-

mated time enroute), located at the top right of the page, will only be displayed if you are

projected to enter the airspace.

The second line of the SUA alert page displays the name or controlling agency of the

SUA, along with the type of SUA to which you are being alerted.

To toggle between the SUA name and controlling agency display:

1. Rotate

one stop in either direction.

If the SUA name or controlling agency is too long to fit on the display, the GPS 155XL

will automatically scroll to display the rest of the information.

SUA number

SUA Floor altitude

Alert type

Controlling

airport identifier

SUA type

ETE

(if applicable)

SUA Name or

controlling

agency

SUA Ceiling altitude

NRST KEY

SUA Messages

SECTION

SUA alert page

Frequency information for SUA. If the informa-

tion is too long to fit on the display, the GPS

155XL will automatically scroll to display the rest

of the information.

The following SUA types can appear in the SUA type field:

Message Airspace Type

alrt - Alert

caut - Caution

cl B - Class B

cl C - Class C

cta - ICAO Control Area

dngr - Danger

moa - Military Operations Area

proh - Prohibited

rstc - Restricted

tma - ICAO Terminal Control Area

trng - Training

trsa - Terminal Radar Service Area

unsp - Unspecified

warn - Warning

The last line on the SUA alert page displays the SUA’s controlling airport identifier

and the ceiling and floor altitudes for the SUA alert. Controlling agency frequencies

may be viewed by highlighting the controlling airport identifier with the cursor and

pressing

. The following are examples of what can appear in the altitude fields:

Message Meaning

8000ftM - 8000 feet mean sea level (MSL)

3000ftA - 3000 feet above ground level (AGL)

ground - Ground level

msl - Mean sea level

notam - See Notice to Airmen (NOTAM)

for altitude restrictions

not sp - Altitude is not specified

unlmtd - Altitude is unlimited

NRST KEY

Special Use

Airspace

SECTION

Altitude buffer set at 500 feet. This provides an

added 500 foot margin beyond the floor and ceil-

ing limits for an airspace.

All SUA alert messages except for prohibited areas may be turned on or off

through the GPS 155XL’s unit settings options, found under the

key (see page

105). Alerts for prohibited areas will always be displayed, regardless of unit settings

or operating mode. SUA alerts may be turned off so the pilot can avoid continuous

alerts in areas with extensive special use airspace. SUA alerts are automatically dis-

abled during approach operations.

Important: Turning off the SUA alerts only stops the display of SUA messages.

Any applicable SUA alert pages will still be available from the

key.

The GPS 155XL also features an altitude buffer which may be set to provide a

greater level of protection from penetrating an SUA. By specifying an altitude in the

buffer, you can effectively stretch an SUA’s altitude boundaries in both directions. This

allows the pilot to add an extra margin of prevention around controlled or restricted

airspace. For instructions on setting the altitude buffer, see page 105.

SUA Settings Page

ROUTE TERMINOLOGY

The diagram at the right shows a basic route

consisting of five waypoints and four legs.

The waypoint you are travelling to is called the

‘active to’ waypoint, and the waypoint immediately

behind you is called the waypoint. The‘active from’

course line between the active from and the active to

waypoint is called the ‘active leg’.

DIRECT-TO

& ROUTE NAV

SECTION

Section 4

Direct-to & Route Navigation

One of the many benefits of GPS navigation is the ability to fly directly to a way-

point or fly a chain of waypoints without using ground-based navigation aids. To take

advantage of the convenience and efficiency provided by point-to-point GPS naviga-

tion, the GPS 155XL provides two basic methods of selecting a destination for your

flight: and . The direct-to function provides a fast way todirect-to route navigation

set a course to a destination waypoint from your present position. The route function

allows the pilot to create a chain of waypoints to fly in sequence and provides access

to the GPS 155XL’s approach, SID and STAR capabilities.

As you pass each waypoint in the route, the GPS 155XL’s automatic leg sequenc-

ing and turn anticipation features will automatically select the next waypoint as the

‘active to’ waypoint and provide smooth steering guidance around the turn. If you are

not currently navigating a particular route leg (e.g., your starting position is not a

route waypoint), the unit will select the appropriate leg as the active route segment.

ACTIVE LEG

EOS

KTUL

SGF

KSTL

'ACTIVE FROM' WAYPOINT 'ACTIVE TO' WAYPOINT

MAP

DIRECT-TO

Selecting and

Cancelling a Direct-To

SECTION

To select a direct-to destination, press the Dkey

and enter the waypoint identifier using K Oand .

To quickly select a direct-to from any page that

displays a single waypoint identifier (e.g., the

nearest airport page), press , followed by DE.

The GPS 155XL’s provides a quick method of setting a coursedirect-to function

to a destination waypoint. Once a direct-to destination is activated, the GPS 155XL

will establish a point-to-point route line along the great circle from your present

position to the destination and provide steering guidance and navigation data to the

waypoint until it is cancelled. If you are navigating to a waypoint and get off course,

the direct-to function may also be used to re-center the d-bar to proceed to the same

waypoint.

To select a direct-to destination:

1. Press the

key. The NAV summary page appears with the destination field highlighted.

2. Use

and

to enter the identifier of the desired waypoint.

3. Press

to confirm the identifier, and

to accept the direct-to confirmation page.

To re-center the d-bar to the same active-to waypoint:

1. Press the

key, followed by

twice. NOTE: If you’re navigating an active approach

with the MAP as the active waypoint, the approach will be cancelled.

A direct-to may also be quickly activated from many pages that display a single

waypoint identifier (e.g., the nearest airport page) by simply pressing

and

For pages that display a list of waypoints (e.g., the user waypoint list page), you must

highlight the desired waypoint with the cursor before pressing the

key. Once a

direct-to is activated, the GPS 155XL will provide navigation guidance until the

direct-to is cancelled or the unit is turned off.

To cancel a direct-to destination:

1. Place the cursor over the destination field on the NAV summary page.

2. Press

. The destination field will go blank.

3. Press

. The GPS 155XL will resume navigating Route 0 (the active route) if available.

DIRECT-TO

Manually Selecting

A Course

SECTION

The waypoint sequencing field, located at the

bottom left of the direct-to confirmation page, dis-

plays the current status of the external GPS SEQ

switch.

To manually set your course from the course select

field, set the GPS SEQ switch to the ‘AUTO’ posi-

tion and enter the selected course in the course

select field. NOTE: Whenever the GPS SEQ switch

is set to the ‘HOLD’ position, the selected course

will be determined by the external OBS/HSI.

When using the course select feature on the direct-

to confirmation page or when the GPS SEQ switch

is set to the ‘HOLD’ position and external course

input is not present, you may also enter the

desired course from the NAV summary page using

the course field at the bottom of the page.

Whenever you perform a direct-to, the GPS 155XL will set a point-to-point great

circle course to your destination. You can also manually define the course to your

destination with the GPS 155XL’s feature. The course select feature isCourse Select

available from the bottom line of the direct-to confirmation page whenever the

external GPS SEQ switch is in the ‘Auto’ position.

To manually set a course:

1. Set/confirm the GPS SEQ switch in the ‘AUTO’ position.

2. Press the

key. The direct-to confirmation page will appear.

3. Rotate

to place the cursor on the course select field.

4. Use

to begin entry of the selected course (the

and

knobs may be used once

you have started editing the course select field).

5. Press

to accept the course, and

again to acknowledge the ‘ok?’ prompt.

The GPS 155XL will now use the selected course for your CDI and DTK steering

guidance. To reset the course to a GPS-calculated course from your present position,

simply press

, followed by

Waypoint

Sequencing Field

Waypoint Identifier Field

Waypoint Position, Facility

Name or City/Region

(selectable)

Course Select Field

The GPS 155XL lets you create up to 20 routes (numbered 0 through 19), with up

to 31 waypoints each. Routes are created, copied and edited through the

key,

which features five route pages selectable from the GPS 155XL’s outer knob.

The five route pages can be divided into two types: active route pages and a

route catalog page. Active route pages provide information and editing functions for

route 0, which always serves as the route you are currently navigating. The route cata-

log page serves as the main page for creating, editing, activating, deleting and copying

all routes.

Routes 1-19 are used as storage routes, which are stored in the GPS 155XL’s inter-

nal memory. Once a storage route is ‘activated’, a copy is placed into route 0 for navi-

gation until it is cancelled, overwritten by activating another route or erased when the

unit is turned off. If you want to save a route currently in route 0, be sure to copy it

to an open storage route (routes 1-19) before it is cancelled, overwritten or erased.

REMEMBER!

If you want to save the active route, be sure to

copy it to an empty storage route (1-19) before

turning the GPS 155XL off or activating a new

route (or direct-to destination). See page 65 for

instructions on copying routes.

SECTION

ROUTE NAV

Route Pages

Approach Select Page

Active Route Page

Route Catalog Page

SID Select Page STAR Select Page

The GPS 155XL’s is used to create, edit, delete or copy routes,route catalog page

and serves as the main page for a host of functions. These include route activation,

determining the closest point of approach and search-and-rescue operations. It also

displays a summary of routes currently stored in memory, with the departure and

arrival route waypoints and total distance for the selected route number. To scroll

through the available routes, rotate

. A one-line user comment may be added to

any storage route, which will be displayed on the route catalog page.

To add user comments to any route (except route 0):

1. Rotate

to display the route you would like to add comments to.

2. Press

and use

to highlight the bottom row.

3. Use

and

to enter comments, and press

. To erase press

, then

The route action field, located at the top right of the page, is used to select the

desired route operation. The following functions are available:

• activate the route for navigationActivate -

• activate a route in reverse orderReverse -

• create a new route, or edit an existing routeEdit -

• select an approach for the route (see Section 5)Approach -

• select a STAR for the route (see Section 5)Star -

• select a SID for the route (see Section 5)Sid -

• delete a routeDelete -

• copy the current route to an empty routeCopy -

• CPA - calculate the closest point of approach

• perform search-and-rescue ladder operationsSearch -

• evaluate enroute RAIM availability over the entire routeRAIM prd -

SECTION

ROUTE NAV

Route Catalog Page

1. Route selection field

2. Route action field

3. Departure/Arrival waypoints

4. Cumulative distance of route

5. Comments/Parallel track offset field

{

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Kategori:	Inte kategoriserad
Modell:	GPS 155XL TSO

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