Garmin GPS III User manual

Owner’s
Manual &
Reference
®
GPS III Pilot B2 4/1/99 2:01 PM Page 1

Software Version 2.05 or above
GARMIN International, Inc., 1200 E. 151st Street, Olathe, Kansas 66062 USA
Tel: [phone] Fax: [phone]
GARMIN (Europe) Ltd., Unit 5, The Quadrangle, Abbey Park Industrial Estate, Romsey SO51 9AQ UK
Tel: [phone] Fax: [phone]
GARMIN (Asia) Corp., 3F, No.1, Lane 45, Pao-Hsing Road, Hsin Tien, Taipei, Taiwan R.O.C.
Tel: [phone]-3773 Fax: [phone]-1758
Web Site Address: www.garmin.com
© 1997-1999 GARMIN Corporation All rights reserved. Except as expressly provided herin, no part of this manual may
be reproduced, copied, transmitted, disseminated or stored in any storage medium, for any purpose without the express
written permission of GARMIN. GARMIN Corporation hereby grants permission to download a single copy of this man-
ual and of any revision to this manual onto a hard drive or other electronic storage medium to be viewed and to print
one copy of this manual or of any revision hereto, provided that such electronic or printed copy of this manual or revi-
sion must contain the complete text of this copyright notice and provided further that any unauthorized commercial
distribution of this manual or any revision hereto is strictly prohibited.
Information in this document is subject to change without notice. GARMIN reserves the right to change or improve its
products and to make changes in the content without obligation to notify any person or organization of such changes.
March 1999 Part # 190-00127-00 Rev. B Printed in Taiwan.
GPS III Pilot B2 4/1/99 2:01 PM Page 2

Thank You!
Thank you for choosing the GARMIN GPS III Pilot —the smallest, easiest-to-use GPS navigator for today’s
sophisticated aviator! The GPS III Pilot represents GARMIN’s continuing commitment to provide a quality air-
borne navigation system in a versatile and user-friendly flexible design you’ll enjoy for years. To get the most
from your new GPS, take the time to read through this owner’s manual in order to understand the operating
features of the GPS III Pilot. This manual is organized into three sections for your convenience:
Section One (Getting Started) introduces you to the basic features of the unit and provides a quick-start
orientation to the GPS III Pilot.
Section Two (Simulator Tour) provides a step-by-step lesson in how your new GPS III Pilot would oper-
ate in actual flight by utilizing the built-in simulator mode.
Section Three (Reference) provides details about the advanced features and operations of the GPS III Pilot
by topic.
Before getting started with your GPS, check to see that your GARMIN GPS III Pilot package includes the
following items. If you are missing any parts, please contact your dealer immediately.
Standard Package:
• GPS III Pilot Unit with Detachable Antenna
• Wrist Strap
• GPS III Pilot Owner’s Manual
• Quick Reference Card
• Velcro™ Fasteners
• Mounting Bracket
i
INTRODUCTION
About This Manual
GPS III Pilot B2 4/1/99 2:01 PM Page i

CAUTION: The Global Positioning System (GPS) is operated by the government of the United States,
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 GPS III Pilot is a precision electronic
NAVigation AID (NAVAID), any NAVAID can be misused or misinterpreted and, therefore, become unsafe.
WARNING: For vehicular applications, it’s the sole responsibility of the owner/operator of the GPS III Pilot
to secure the GPS unit so that it will not cause damage or personal injury in the event of an accident. For auto-
motive use, do not mount the GPS III Pilot over airbag panels or in a place where the driver or passengers are
likely to have an impact with it in an accident or collision. The mounting hardware provided by GARMIN is
not warranted against collision damage or the consequences thereof.
WARNING: For vehicular operations, it is the sole responsibility of the operator of the vehicle to operate
his or her vehicle in a safe manner, maintain full surveillance of all conditions at all times, and never become
distracted by the GPS III Pilot to the exclusion of safe operating practices. It is unsafe to operate the GPS III
Pilot while flying or driving. Failure by the operator of a vehicle equipped with a GPS III Pilot to pay full atten-
tion to operating the vehicle while the vehicle is in motion could result in an accident.
INTRODUCTION
Cautions
ii
#
!
#
!
#
!
GPS III Pilot B2 4/1/99 2:01 PM Page ii

INTRODUCTION
FCC Compliance
iii
This device complies with Part 15 of the FCC limits for Class B digital devices. This equipment generates,
uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. Furthermore, there is no guarantee that interference
will not occur in a particular installation.
If this equipment does cause harmful interference to other equipment, which can be determined by turn-
ing the affected equipment off and on, the user is encouraged to try and correct the interference by relocating
the equipment or connecting the equipment to a different circuit than the affected equipment. Consult an
authorized dealer or other qualified service technician for additional help if these remedies do not correct the
problem.
Operation is subject to the following conditions: (1) This device may not cause harmful interference,
and (2) this device must accept any interference received, including interference that may cause undesired
operation.
The GPS III Pilot 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 your authority to
operate this device under Part 15 regulations.
GPS III Pilot B2 4/1/99 2:01 PM Page iii

INTRODUCTION
Limited Warranty
iv
GARMIN Corporation warrants this product to be free from defects in materials and workmanship for one
year from the date of purchase. GARMIN 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 cus-
tomer is, however, responsible for any transportation costs. This warranty does not cover failures due to abuse,
misuse, accident or unauthorized alteration or repairs.
THE WARRANTIES AND REMEDIES CONTAINED HEREIN ARE EXCLUSIVE AND IN LIEU OF ALL
OTHER WARRANTIES EXPRESSED OR IMPLIED, INCLUDING ANY LIABILITY ARISING UNDER WARRAN-
TY 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.
IN NO EVENT SHALL GARMIN BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSE-
QUENTIAL DAMAGES, WHETHER RESULTING FROM THE USE, MISUSE OR INABILITY TO USE THIS
PRODUCT OR FROM DEFECTS IN THE PRODUCT. SOME STATES DO NOT ALLOW THE EXCLUSION OF
INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATIONS MAY NOT APPLY TO YOU.
To obtain warranty service, call the GARMIN Customer Service department (913-397-8200) 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 warranty service station. A copy of
the original sales receipt is required as the proof of purchase for warranty repairs. GARMIN retains the exclusive
right to repair or replace the unit or software or offer a full refund of the purchase price at its sole discretion. SUCH
REMEDY SHALL BE YOUR SOLE AND EXCLUSIVE REMEDY FOR ANY BREACH OF WARRANTY.
GPS III Pilot B2 4/1/99 2:01 PM Page iv

INTRODUCTION
About This Manual . . . . . . . . . . . . . . . . . . . .i
Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . .ii
FCC Compliance . . . . . . . . . . . . . . . . . . . . .iii
Limited Warranty . . . . . . . . . . . . . . . . . . . . .iv
GETTING STARTED
Unit Features . . . . . . . . . . . . . . . . . . . . . . . .1
Keypad Usage / Display . . . . . . . . . . . . . . . . .2
Battery Installation . . . . . . . . . . . . . . . . . . . .3
What is GPS? . . . . . . . . . . . . . . . . . . . . . . . .4
Initialization . . . . . . . . . . . . . . . . . . . . . . . . .5
Main Page Sequence . . . . . . . . . . . . . . . . . . .7
Satellite Status Page . . . . . . . . . . . . . . . . . . .8
Position Page . . . . . . . . . . . . . . . . . . . . . . . .9
Map Page . . . . . . . . . . . . . . . . . . . . . . . . . .10
HSI Page . . . . . . . . . . . . . . . . . . . . . . . . . .11
Highway Page . . . . . . . . . . . . . . . . . . . . . . .12
Main Menu . . . . . . . . . . . . . . . . . . . . . . . . .13
Viewing Database Info . . . . . . . . . . . . . . . .14
Going to a Waypoint . . . . . . . . . . . . . . . . . .15
Cancel GOTO / Active Route . . . . . . . . . . . .16
SIMULATOR TOUR . . . . . . . . . . . . . . . . . . .17
REFERENCE
Satellite Status Page . . . . . . . . . . . . . . . . . .27
Position Page . . . . . . . . . . . . . . . . . . . . . . .32
Map Page . . . . . . . . . . . . . . . . . . . . . . . . . .35
HSI Page . . . . . . . . . . . . . . . . . . . . . . . . . .40
Vertical Navigation . . . . . . . . . . . . . . . . . . .44
Highway Page . . . . . . . . . . . . . . . . . . . . . . .46
Waypoint Categories . . . . . . . . . . . . . . . . . .48
Nearest Page . . . . . . . . . . . . . . . . . . . . . . . .53
User Waypoints . . . . . . . . . . . . . . . . . . . . .55
GOTO . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
TracBack . . . . . . . . . . . . . . . . . . . . . . . . . .64
Routes . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
Active Route Page . . . . . . . . . . . . . . . . . . . .70
v
INTRODUCTION
Table of Contents
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vi
INTRODUCTION
Table of Contents
Main Menu . . . . . . . . . . . . . . . . . . . . . . . . .73
Setup Functions . . . . . . . . . . . . . . . . . . . . .76
APPENDIX A: Mounting Instructions . . . . . . . .88
APPENDIX B: Specifications . . . . . . . . . . . . . . .90
APPENDIX C: Wiring/Interfacing . . . . . . . . . . .91
APPENDIX D: Antenna/Remote Mounting . . . . .92
APPENDIX E: Messages . . . . . . . . . . . . . . . . . .93
APPENDIX F: Map Datums . . . . . . . . . . . . . . .95
APPENDIX G: Navigation Terms . . . . . . . . . . . .98
APPENDIX H: Index . . . . . . . . . . . . . . . . . . .100
GPS III Pilot B2 4/1/99 2:01 PM Page vi

1
GETTING STARTED
Unit Features
Antenna
(detachable)
Function Keys
LCD Display
Battery Door
Rocker Keypad
Power/Backlight
Key (red)
To change the screen
orientation, press and
hold the PAGE key.
GPS III Pilot B2 4/1/99 2:02 PM Page 1

2
GETTING STARTED
Keypad Usage/Display
(POWER)— Red key turns the unit on and off, and
controls three levels of screen backlighting intensity.
(PAGE)— Scrolls main pages in sequence and returns
display from a menu/options page to a main page.
Press and hold this key to change screen orientation.
(MENU)— Displays a menu of available options for
the current page. Press twice to display the Main Menu.
(GOTO/
NRST )— Displays the GOTO waypoint win-
dow, allowing you to select the destination waypoint.
Press and hold this key to display the nine nearest air-
ports, airspaces, navaids, waypoints, etc.
(ENTER/
MARK )— Activates highlighted fields and
confirms menu options and data entry. Press and hold
this key to mark present position as a waypoint.
(QUIT)— Returns the display to a previous page or
restores a data field’s previous value.
(IN and OUT)— Allows you to zoom in/out through
23 scales on the Map Page. Also adjusts scale on the
Highway and HSI pages.
(ROCKER KEYPAD)— Controls the movement of
the cursor, is used to select options and positions, and
to enter data.
CURSOR— A solid black bar which can be moved
up, down, left, and right with the keypad to select indi-
vidual fields on the display (see above).
DEFAULT— A system-selected format, built into the
operating software or the unit’s memory, that will be
followed unless the user chooses a different setting.
FIELD— The location on a page (see above) where a
group of characters or option is entered and displayed.
HIGHLIGHT— The act of using the cursor to select a
field for the purpose of entering data.
SCROLL— The act of moving through characters or
options from a selected field.
DATA ENTRY— Entering data, such as waypoint
names, typically begins and ends with the ENTER/
MARK key. Use the rocker keypad to enter the actual
data: UP/DOWN to change the highlighted character,
RIGHT to move on to the next character.
Example of
Cursor high-
lighting the
‘Mode’ Field
GPS III Pilot B2 4/1/99 2:02 PM Page 2

GETTING STARTED
Battery Installation
3
The GPS III Pilot operates on 4 AA batteries, which are installed at the base of
the unit. These batteries provide up to 24 hours of continuous use. Rechargeable
NiCad or lithium batteries may also be used.
NOTE: The on-screen battery level indicator is calibrated for alkaline batteries,
and will not be accurate when using NiCad or lithium batteries (see page 79).
To install the batteries:
1. Flip up the metal ring at the base of the unit, and turn the ring 90˚ counterclockwise.
2. Install the batteries and close the battery compartment door. When replacing the
GPS III Pilot’s batteries, observe the polarity markings engraved in the plastic
case.
3. Lock the door in the closed position by rotating the metal ring 90˚ clockwise.
Battery life varies due to a variety of factors, including temperature and
backlighting. You may find that the battery life varies in different conditions and
that lithium batteries provide longer life in colder conditions. An internal 10-
year lithium battery will retain your data while you’re changing batteries.
Polarity
Markings
#
?
GPS III Pilot B2 4/1/99 2:02 PM Page 3

What is GPS?
GETTING STARTED The Global Positioning System (GPS) is a system of 24 satellites which circle the
earth twice a day in a very precise orbit and transmit information to earth. The GPS
III Pilot must continuously “see” at least three of these satellites to calculate your
position and track your movement. At times, additional satellites may be needed to
determine a position.
By using an almanac (a timetable of satellite numbers and their orbits) stored in
the receiver’s memory, the GPS III Pilot can determine the distance and position of
any GPS satellite and use this information to compute your position.
Your GPS receiver can only see satellites above the horizon, so it needs to know
what satellites to look for at any given time. To use this almanac data, your GPS
needs to either be told its general location (“initialized”) or given the opportunity to
find itself. Once you initialize the unit to a position, it will typically compute a fix with-
in a few minutes. We’ll show you how to initialize your new GPS III Pilot on page 5.
Initialization is only necessary under the following conditions:
• The first time you use your receiver (new from the factory).
• After the receiver has been moved over 500 miles (with the power off) from
the last time you used it.
• If the receiver’s memory has been cleared and all internally stored data has
been lost.
Because the GPS III Pilot relies on satellite signals to provide you with navigation
guidance, the receiver needs to have an unobstructed, clear view of the sky for best
performance. In a nutshell, the GPS receiver’s view of the sky will generally determine
how fast you get a position fix—or if you get a fix at all. GPS signals are relatively
weak and do not travel through rocks, buildings, people, metal, or heavy tree cover,
so remember to keep a clear view of the sky at all times for best performance.
Hold the receiver at a
comfortable height with the
antenna pointing up.
When new (or if a position
cannot be determined after 10
minutes), the GPS III Pilot will
prompt you to initialize the
receiver. The unit needs a
starting position to determine
which satellites are in view.
4
GPS III Pilot B2 4/1/99 2:02 PM Page 4

Once the GPS III Pilot has calculated a position fix, you’ll usually have anywhere
from five to twelve satellites in view. The receiver will then continuously select the best
satellites in view to update your position. If some of the satellites in view get blocked
or “shaded,” the receiver can simply use an alternate satellite to maintain the position
fix. Although a GPS receiver needs four satellites to provide a three-dimensional
(3D) fix, it can maintain a two-dimensional (2D) fix with only three satellites. A
three-dimensional fix means the unit knows its latitude, longitude, and altitude, while
a two-dimensional fix means the unit knows only its latitude and longitude.
Initializing Your GPS III Pilot
To initialize the GPS III Pilot, take the receiver outside and find an open area where
the antenna has a clear view of the sky. You may either hold the receiver at a comfort-
able height with the antenna pointing up (see page 4), or mount the receiver on the
dash of a vehicle, as described in Appendix A. (Likewise, when you use your GPS III
Pilot in a vehicle, make sure the antenna is pointing up.)
To turn the GPS III Pilot on, press and hold the red power key.
The Welcome Page will be displayed while the unit conducts a self test. Once
testing is complete, the Welcome Page is replaced by the Database Page (which shows the
effective date for the Jeppesen database), followed by a warning page, then by the Satellite
Status Page. A message will inform you to “select initialization method.” (If the initializa-
tion prompt has not automatically appeared, press MENU and select ‘Initialize Position’.)
To initialize your unit:
1. Press ENTER to acknowledge the message. A window will appear prompting you to
select an initialization method.
2. Use the rocker keypad to highlight ‘Use Map’, and press ENTER.
3. Use the rocker keypad to point the map cursor to your approximate location (within at
least 250 miles). You may also wish to use the IN and OUT zoom keys to make it easier to
identify your approximate position.
4. Press ENTER to select the position and begin searching for satellites.
Check the Satellite Status
Page for ‘2D Navigation’ or
‘3D Navigation’ to verify a
position fix.
The Welcome Page is
displayed when the GPS III
Pilot is first turned on. During
this time the receiver is con-
ducting a self-test.
5
GETTING STARTED
Initialization
GPS III Pilot B2 4/1/99 2:02 PM Page 5

This usually provides a position fix in one minute. You’ll know you have a fix
when the unit automatically transitions from the Satellite Page to the Map Page
(shown bottom left). Your receiver is now ready to use!
To turn the unit off:
1. Press and hold the red power key for one second.
Troubleshooting
If you have trouble initializing or getting a position fix, check the following:
• Does the receiver have a clear view of the sky?
If there are large buildings or mountains, or if there is heavy tree cover, the receiv-
er may not be receiving enough satellite signals to calculate a fix. Also, if you’re
using the GPS III Pilot inside the cockpit, make sure the unit is placed so that it
has the clearest possible view of the sky. Your GPS will only be able to detect satel-
lites that it can “see” through your vehicle’s windshield. Depending on the slope
of glass or the overall surface area, it may be necessary to remote mount an anten-
na inside the cockpit or install an outside antenna. (Contact your local GARMIN
dealer and inquire about the GA 26 Remote Antenna, part number 010-10052-
02, or the GA 56 Low Profile Antenna, part number 010-10040-01.)
• Have you selected the right area when initializing?
Check for the correct approximate position on the Map Page (press PAGE until
the Map Page appears; see pages 7 and 10), or reselect your approximate
location to restart the initialization.
• Have you moved more than 500 miles from the last calculated position
with the receiver off?
Reinitialize the receiver by selecting your approximate position on the map, or
select ‘AutoLocate’ from the Satellite Status Page Options (see page 31).
To initialize the GPS III Pilot,
designate your approximate
location directly on the map
display. Use the rocker keypad
and IN/OUT zoom keys to
position the cursor on the map.
Once the GPS III Pilot has a
position fix, it will automati-
cally transition from the
Satellite Status Page to the
Map Page.
6
GETTING STARTED
Initialization
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To turn the GPS III Pilot back on, press and hold the red power key.
The GPS III Pilot features six main pages which are linked together in a chain. You
can quickly scroll through the pages in either direction using the PAGE or QUIT keys.
Let’s briefly tour each of these pages in order to give you some insight into how they
help you navigate. We’ll go over all of them in more detail in the reference section.
Press the PAGE key to move
through each of the main
pages in normal fashion.
Press the QUIT key to
sequence through the main
pages in reverse order.
7
GETTING STARTED
Main Page Sequence
Highway Page HSI Page
Map PageActive Route Page
Position PageSatellite Status Page
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Let’s start with the Satellite Status Page, which is the page you’ll view while your
unit is getting a position fix. If you’re not already on this page, press PAGE or QUIT
until it appears. The Satellite Status Page shows you status information that helps
you understand what the receiver is doing at any given time, and it’s a page that
you’ll want to occasionally refer back to as you use your unit. It features a sky view
of available satellites, corresponding signal strength bars, the status of your current
position fix (acquiring, 2D, 3D, etc.), and your estimated position error (EPE). You
can also tell how much battery power is remaining, and you can adjust the screen
contrast by pressing the rocker keypad.
Satellites are indicated on the sky view and the signal strength bars by their cor-
responding number, from 01 through 32. The sky view shows where it is looking in
the sky for each satellite, by indicating the direction and elevation (angle above the
horizon). The signal strength bars depict the relative strength of the signal from each
satellite being received. The taller the bar, the stronger the signal.
The signal strength bars give
you an indication of what
satellites are visible to the
receiver, whether or not they’re
being used to calculate a posi-
tion fix, and the signal quality.
If satellite reception is lost, or
an insufficient number of
satellites are available, you
will be alerted with a ‘Poor
Coverage’ receiver status and
message.
8
GETTING STARTED
Satellite Status Page
Satellite Status Page
Receiver Status
Battery Level
Indicator
Signal Strength Bar
Sky View
GPS III Pilot B2 4/1/99 2:02 PM Page 8

The Position Page shows you where you are, what direction you’re heading, and
how fast you’re going—and it’s a page you may want to use when you don’t have a
destination selected.
A graphic compass display at the top of the page shows your direction of travel
(track) while you’re moving, while six user-selectable data fields below display your
current speed, average speed, trip odometer, trip timer, and sunrise/sunset times at
your current position. “User-selectable” means you can change them to display other
navigation information. We’ll cover these fields more in the reference section.
Below the user-selectable data fields are additional data fields to display your
current position, along with current time and date. The current position readout can
be in latitude/longitude, UTM/UPS, Maidenhead or one of several regional grids.
Current time and date can be in local time or UTC (Coordinated Universal Time, or
“zulu” time).
Position Page showing current
position in degrees, minutes
and seconds.
The trip odometer, trip timer
and average speed readings
can all be reset from the ‘Trip
Computer’ option on the Main
Menu. See page 75.
9
GETTING STARTED
Position Page
Position Page
Track Compass Trip Odometer
Current Time
and Date
Current Position
Coordinates
GPS III Pilot B2 4/1/99 2:02 PM Page 9

The Map Page shows your movement using a real-time track log (an electronic
breadcrumb trail that appears directly on the map as you’re traveling), and your
present position as an airplane icon in the center of the map. The Map Page also
shows any nearby airspace boundaries, lakes, rivers, highways and towns. The map
scale is shown in the lower left-hand corner of the map. Use the zoom keys (IN and
OUT) to adjust the map to the desired scale.
To change the map scale:
1. Press the IN zoom key to select a smaller scale and more detail for a smaller area.
2. Press the OUT zoom key to select a larger scale and display a larger area.
The map can be oriented with the top of the page always pointing north,
oriented along your desired course, or it can automatically rotate to keep your
current direction of travel (track) at the top of the screen. ‘North Up’ is the default
setting.
Nearby airports, VORs, NDBs, intersections and user waypoints are depicted on
the map (each with its own unique symbol) with the identifier listed directly above
the waypoint’s symbol. We’ll cover more about the GPS III Pilot’s waypoint features
and the Map Page in the reference section of this manual.
With the map oriented to
‘Track Up’, the pointer always
points up and the map rotates
to your current direction of
travel (track). Note the north
indicator on the map.
You can also select a full-
screen map from the Map
Page Options. See page 37.
10
GETTING STARTED
Map Page
Map Page
Nearby Navaid
(Intersection) Data Fields
Nearby Airport
Present Position
GPS III Pilot B2 4/1/99 2:02 PM Page 10

The GPS III Pilot features two different navigation pages: HSI (horizontal situation
indicator) and Highway. The HSI Page is first. The HSI Page provides graphic steering
guidance to a destination waypoint and will likely become your primary navigation
screen. (The Highway page also provides graphic steering guidance by displaying a
three-dimensional perspective of your course and the surrounding area.) The HSI
graphically depicts a mechanical HSI, showing the desired course using a ‘D-bar’
(course deviation bar; which is part of the course deviation indicator, or ‘CDI’) and
course pointer. If you move off course, the D-bar will indicate off course distance and
direction. To return to the desired course, simply steer in the direction of the D-bar
until it returns to the center of the CDI. The CDI scale is adjustable, with the current
scale indicated at the bottom of the page. The scale setting represents the distance from
the center of the CDI to full left or right limits.
The HSI depicts your (ground) track heading using a rotating ‘compass card’.
Don’t confuse this with the aircraft heading indicated on your panel. On a windy day
these two figures can differ significantly!
The HSI page also provides a TO/FROM indication and vertical guidance, when
using the unit’s vertical navigation (VNAV) features. Four user-selectable data fields
indicate current speed, distance to destination, time en route and time of day.
If you move off course, steer
in the direction of the D-bar
until it returns to the center of
the CDI.
The ‘Big Numbers’ option
(available from the HSI Page
Options) shows a smaller
compass-type display and
larger data field characters.
See page 42. 11
GETTING STARTED
HSI Page
HSI Page
Compass Card
(Track)
Current Speed
and Distance to
Waypoint
Time to Waypoint
Pointer
(Desired Course)
D-bar
(part of CDI)
GPS III Pilot B2 4/1/99 2:02 PM Page 11

The GPS III Pilot’s Highway Page also provides graphic steering guidance to a
destination waypoint. As you head toward your destination, the middle of the screen
provides visual guidance to your waypoint on a moving graphic “highway.” Your pre-
sent position is at the bottom center of the highway display. The line down the mid-
dle of the highway represents your desired course. As you navigate toward a way-
point, the highway will actually move—indicating the direction you’re off course. To
stay on course, simply move toward the center of the highway.
The top of the page indicates speed and distance to your destination (or the next
waypoint in a route), along with a track compass showing current direction of
travel. Directly below the distance reading is the time required to reach your desti-
nation (or the next waypoint in a route), in hours/minutes or minutes/seconds. The
pointer at the bottom of the page also shows the bearing to your destination, relative
to your current track. If the pointer points straight ahead, you’re heading directly to
your destination!
If you move off course, the
highway display will move,
indicating the direction you
are off course. To stay on
course, simply move toward
the center of the highway.
As you approach your desti-
nation, the graphic highway
will stop at the destination
waypoint. You have arrived
when the waypoint is at the
bottom center of the display.
12
GETTING STARTED
Highway Page
Highway Page
Highway Display
Distance to
Destination (or Next
Route Waypoint)
Pointer
(Bearing to
Destination)
Track Compass
GPS III Pilot B2 4/1/99 2:02 PM Page 12