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20 GMR 21/41 Owner’s Manual
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 21: 2 kW, GMR 41: 4kW
Power Input Source: 10–35 VDC, 28W.
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,
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
APPENDIX > SPECIFICATIONS