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The GPS 128 also features a customized moving map display with user-selectable waypoint symbols and comments, and dedicated zoom keys to help to make operation straight forward and intuitive. User-selectable highway or compass navigation pages provide graphic steering guidance to your destination, eliminating the guesswork when youre trying to find your favorite hotspot.

Navigation Features
Waypoints:
Total: 500
Nearest: 9 ( automatic)
Proximity: 9
Routes: 20 reversible routes with
up to 30 points each, plus
MOB and TracBackTM modes
TracBackTM: Automatic track log navigation
Track Log: 1024 points
Map Datums: 107 including one User Datum
Coordinates: Lat/ Lon, UTM/ UPS, MGRS, plus
7 grids, including Maidenhead
and User UTM
Performance
Receiver: Differential-ready 12 parallel
channel receiver continuously
tracks and uses up to twelve
satellites to compute and
update position
Acquisition Times:
Warm: Approx. 15 seconds
Cold: Approx. 45 seconds
AutoLocateTM: Approx. 5 minutes
EZinit: Easy initialization, 45 seconds
Update Rate: 1/ second, continuous
Accuracy:
Position: 15 meters ( 49 feet) RMS*
1-5 meters ( 3-15 feet) RMS
with GARMIN GBR 21 DGPS
receiver ( optional)
Velocity: 0.1 knot RMS steady state
Dynamics: 3g’ s
Interfaces: NMEA 0183 and
RTCM 104 DGPS corrections
Antenna:
GPS 126: Internal QuadHelix
GPS 128 Remote Marine Mount
with 30 of cable
Power
Source: 10-40 vDC
Usage: 2 watts