The GP37 offers extremely accurate position fixes -- 10m for basic GPS, 5m or better with DGPS and 3m or better where WAAS service is available. It should be noted that DGPS is more reliable and accurate, as the WAAS system is still currently under development. There is no guarantee of accuracy, integrity, continuity or availability of the WAAS signal.

For that reason, the GP37 runs with DGPS as the default setting in auto selection mode. In this mode, if the DGPS signal can not be received for any reason, the WAAS mode is automatically selected. Manual setting is also available.

GP37 Features

• 4.5 Inch Diagonal Silver Brite LCD Screen
• Memory Capacity: 1000 Points of Vessel Track, 999 Waypoints or Marks, and 50 Routes comprised of up to 30 Waypoints
• New clearable TRIP odometer in addition to standard odometer
• Waypoint Entry by L/L or TD Position

• Receiving Channels: GPS 12 channels parallel, 12 satellites tracking, WAAS 1 channel
• Rx Frequency: 1575.42 MHz
• Rx Code: C/A code, WAAS
• Position Fixing System: All in view, 8-state Kalman filter
• Position Accuracy:
  • GPS: 10 m (95% of the time, HDOP4)
  • DGPS: 5 m (95% of the time, external data required)
  • WAAS: 3 m (95% of the time)
• Tracking Velocity: 999 kt
• Position-Fixing Time: Warm start: 12 s approx., Cold start: 90 s approx.
• Position Update interval: 1 s
• Beacon Receiver (GP-37 only):
  • Frequency Range: 283.5 kHz to 325.0 kHz
  • MSK Rate: 50,100,200 bps (Auto/Manual selectable)
• Display System: Monochrome LCD, 95 (W) x 60 (H) mm, 120 x 64 dots
• Display Mode: Plotter, Steering, Highway, NAV data, Destination, User display
• Projection: Mercator Memory Capacity: Track: 1000 pts, Waypoint: 999 pts w/ comment
• Storage Capacity: 50 routes w/ 30 waypoint each
• Alarms: Arrival and anchor watch, Cross track error, Odometer alarm, Ship’s speed in and out alarms, Time alarm, Trip alarm, WAAS/DGPS alarm

• LCD DGPS/WAAS Receiver
• Operator's Manual
• Operator's Guide
• Mounting Template "Display"
• DGPS/WAAS Antenna w/ 10M Cable
• 2 Fuses
• White Plastic Cover
• 4 Tapping Screws M5 x 20
• Combination Power/Data Cable
• Mounting Bracket
• Mounting Knob