Garmin GPS 3 Manual

Alarms Settings
Clock Alarmuses the internal clock to provide an ‘Alarm Clock’ message at the time 
you set.
To enable/disable the alarm clock:
1. Highlight the ‘Clock Alarm’ field and press ENTER.
2. Select ‘On’ or ‘Off’ (as desired) and press ENTER.
3. If enabling the alarm, highlight the time field (to the immediate right) and press ENTER. Enter the
alarm time using the rocker keypad and press ENTER.
NOTE: The GPS III must be turned on when the alarm time is reached. Otherwise, the
message will not...

Position Settings
Position Formatis used to change the coordinate system in which a given position
reading is displayed. The default format is latitude and longitude in degrees and minutes
(hddd°mm.mmm’). The following additional formats are available:
• hddd.ddddd° — latitude/longitude in decimal degrees only
• hddd°mm’ss.s” — latitude/longitude in degrees, minutes, seconds
• UTM/UPS — Universal Transverse Mercator / Universal Polar Stereographic grids
• British Grid • German Grid
• Irish Grid • Swedish...

Interface Settings
Formatlets you control the input/output format used when connecting your GPS III to
external NMEA devices, a DGPS beacon receiver, a personal computer, etc. Five format
settings are available:
• GARMIN — the proprietary format used to exchange waypoint, route, track log
data with a PC or with another GPS III.
• NMEA — supports the input/output of standard NMEA 0183 version 2.0 data.
• None — provides no interfacing capabilities.
• RTCM/NMEA — allows Differential GPS (DGPS) input using...

The GPS III can be mounted on the dashboard of an automobile or to another
convenient surface using the two Velcro™ strips provided with the unit. 
To mount the GPS III using the Velcro strips:
1. Select a location for the unit that pro-
vides a clear and unobstructed view of
the sky.
2. Remove the paper strip liners from both
pieces of Velcro.
3. Make sure the surface to which you’re
adhering the Velcro is clean and dry.
Place the adhesive side of the rough
piece of Velcro on the desired mounting...

The GPS III is constructed of high-quality materials and should not require
user maintenance. If your unit ever needs repair, please take it to an authorized
GARMIN service center. The GPS III has no user-serviceable parts. Never attempt
any repairs yourself. To protect your GPS III, keep it in its carrying case (optional accessory) when not in use, and
never allow gasoline or other solvents to come into contact with the case. To clean the case and lens, use a soft cloth
and a household window cleaner....

Interfacing formats are selected from the Setup Menu, described on page 67. The
input/output lines on your GPS III are RS-232 compatible allowing easy
interface to a wide range of external devices, including PCs, differential
beacon receivers, marine autopilots and/or a second GPS receiver.
The NMEA 0183 version 2.0 interface format is supported by the
GPS III and enables the unit to drive up to three NMEA devices:
NMEA 0183 version 2.0 Approved sentences:
GPGGA, GPGLL, GPGSA, GPGSV, GPRMB, GPRMC,...

The GPS III’s antenna may be removed to allow attachment of an optional
remote-mounted antenna. In some applications, using a remote-mounted antenna
will dramatically increase the number of satellites received. The GPS antenna should
be mounted in a location which provides an unobstructed view of much of the sky. A minimum of four satellites are
needed to determine a three dimensional position. Satellite coverage will vary throughout the day, but may be checked
at any time using the Satellite Status Page...

Alarm Clock—The alarm clock time that was set from
the Alarms submenu has been reached.
Approaching—You are one minute away from reaching
a destination waypoint.
Arrival at—You have reached your destination way-
point.
Battery Power Low—The batteries are low and should
be replaced.
Data Transfer Complete—The unit has finished
uploading or downloading information to the connected
device.
Degraded Accuracy—The unit’s accuracy has been
degraded beyond 500 meters due to poor satellite geom-
etry or data...

RAM Failed—The GPS III has detected a failure in its
internal memory. If the message persists, the GPS III is
unusable and should be taken to an authorized GARMIN
service center.
Received Invalid Waypoint—A waypoint was received
during upload transfer that has an invalid identifier.
Receiver Failed—A failure in receiver hardware has
been detected. If this message persists, do not use the
unit and take it to an authorized dealer for repair.
ROM Failed—The permanent memory has failed and
the unit is not...

AdindanAdindan- Ethiopia, Mali, Senegal, Sudan
AfgooyeAfgooye- Somalia
AIN EL ABD ‘70AIN EL ANBD 1970- Bahrain Island, Saudi
Arabia
Anna 1 Ast ‘65Anna 1 Astro ‘65- Cocos Isl.
ARC 1950ARC 1950- Botswana, Lesotho, Malawi,
Swaziland, Zaire, Zambia, Zimbabwe
ARC 1960ARC 1960- Kenya, Tanzania
Ascnsn Isld ‘58Ascension Island ‘58- Ascension Island
Astro B4 SorolAstro B4 Sorol Atoll- Tern Island
Astro Bcn “E”Astro Beacon “E”- Iwo Jima 
Astro Dos 71/4Astro Dos 71/4- St. Helena 
Astr Stn ‘52Astronomic Stn ‘52-...