Specifications – Garmin GMR 20/40 User Manual
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GMR 20/40 Radar Installation Instructions
Specifications
Unit Dimensions:
28” (710 mm) D x 8” (205 mm) H
Radar Scanner Weight:
Unit 26 lbs; cable 8.35 lbs
Range Scales (Range Rings):
GMR 40 — 1/8 nm (1/32 nm) to 36 nm (9 nm)
GMR 20 — 1/8 nm (1/32 nm) to 24 nm (6 nm)
Power Output:
GMR 20: 2 kW / GMR 40: 4 kW
Power Input Source:
10-35 v D.C. 28 W
Operating Temperature Range:
-25° C to 70° C, and a relative humidity up to 95% at 35°C
Beamwidth:
Horizontal beamwidth of 3.6° nominal / Vertical beamwidth of 25° nominal
Range:
GMR 20: 24 nm / GMR 40: 36 nm
Wind Velocity:
Wind speed up to 100 Kts
Antenna RPMs:
24 rpm
Range Ring Accuracy:
+/- 1 meter
Bearing Accuracy:
1°
Minimum Range:
35 meters
Range Discrimination:
30 meters
Sensitivity and Tune Controls:
Gain, Sea Clutter, Rain Clutter, and Frequency Tune
Radar/Chart Synchronization:
Overlay mode. Split overlay with standard radar presentation.
Off Center Function:
Look ahead, Auto Shift, and Manual
RF Transmit Frequency:
9410 ± 30 MHz