Garmin GPS 72 User Manual

46
Introduction
46
Reference
Setup Menu — ‘ Alarms’ Tab
The ‘Alarms’ Tab contains settings for Anchor Drag, Approach and Arrival, Off Course,
Shallow Water, and Deep Water. These settings will determine if, and when a warning
beep is sounded and/or a message is displayed.
‘ Anchor Drag’ — The Anchor Drag Alarm alerts you when the boat has drifted more than
a distance set by the user. The alarm can be turned ‘On’ or ‘Off’.
‘ Approach and Arrival’ — The Approach and Arrival Alarms alert you when you are
approaching a turn or arriving at your destination. ‘Automatic’ will alert you between
15 and 90 seconds before, depending on your speed. ‘Distance’ and ‘Time’ alert you at
the specifi ed distance or time.
‘ Off Course’ — The Off Course Alarm will alert you when you are off course more than
the distance set. The Off Course alarm can be turned ‘On’ or ‘Off’.
‘ Shallow Water’ — This alarm requires input from a NMEA device supplying the “DPT”
sentence. The Shallow Water alarm will alert you when the water depth is less than the
depth set.
‘ Deep Water’ — This alarm requires input form a NMEA device supplying the “DPT”
sentence. The Deep Water Alarm will alert you when the water is deeper than the
depth set.
Setup Menu — ‘Alarms’ Tab
Main Menu
Alarms Tab
190-00294-00_0B.indd 46 9/25/2002, 2:37:31 PM

Garmin GPS 72 Specifications

Navigation Features

Waypoints/icons	500 with name and graphic symbol
Routes	50 reversible routes with up to 50 points each
Tracks	Automatic track log; 10 saved tracks
Trip computer	Current speed, average speed, resettable max. speed, trip timer and trip distance
Alarms	Anchor drag, approach and arrival, off-course, proximity waypoint, shallow water and deep water
Tables	Built-in celestial tables for best times to fish and hunt, sun and moon rise, set and location
Map datums	More than 100 plus user datum
Position format	Lat/Lon, UTM/UPS, Maidenhead, MGRS, Loran TDs and other grids, including user grid

GPS Performance

Receiver	WAAS enabled, 12 parallel channel
Acquisition times (Warm)	Approximately 15 seconds
Acquisition times (Cold)	Approximately 45 seconds
Acquisition times (AutoLocate)	Approximately 5 minutes
Update rate	1/second, continuous
GPS accuracy (Position)	< 15 meters, 95% typical
GPS accuracy (Velocity)	0.05 meter/sec steady state
DGPS (USCG) accuracy (Position)	3-5 meters, 95% typical
DGPS (USCG) accuracy (Velocity)	0.05 meter/sec steady state
DGPS (WAAS) accuracy (Position)	< 3 meters, 95% typical
DGPS (WAAS) accuracy (Velocity)	0.05 meter/sec steady state
Dynamics	6 g’s
Interfaces	RS232 with NMEA 0183, RTCM 104 DGPS data format and proprietary GARMIN
Antenna	Built-in quadrifilar
Differential	DGPS, USCG and WAAS capable

Power

Source	External power, 8-35V; two “AA” batteries (not included)
Battery life	Up to 16 hours

Physical

Size	2.7"W x 6.2"H x 1.2"D (6.9 x 15.7 x 3.05 cm)
Weight	7.7 oz. (225 g)
Display	1.6"W x 2.2"H (4.1 x 5.6 cm) 120 x 160 pixels, high-contrast FSTN with bright backlighting
Case	Fully gasketed, high impact plastic alloy, waterproof to IEC 529 IPX7 standards
Temperature range	5ºF to 158ºF (-15ºC to 70ºC)
User data storage	Indefinite, no memory battery required