Specifications – Garmin GMR 18 User Manual
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GMR 18 Marine Radar Installation Instructions
Specifications
Unit Dimensions:
18" (457 mm) D x 8.9" (226 mm) H
Radar Scanner Weight:
Unit 15.8 lbs (7.17 kg); cable 8.4 lbs (3.81 kg)
Range Scales (Range Rings):
1/8 nm (1/32 nm) to 36 nm (9 nm)
Power Output:
4 kW
Power Input Source:
10.5-35 VDC 33.5 W
Operating Temperature Range:
5° F (-15° C) to 140° F (60° C), and a relative humidity up to 95% at 95° F (35° C)
Beamwidth:
Horizontal beamwidth of 5° nominal / Vertical beamwidth of 25° nominal
Range:
36 nm
Wind Velocity:
Wind speed up to 100 Kts
Antenna RPMs:
24/30 rpm
Range Ring Accuracy:
20m or ± 1.5% of range scale, whichever is greater
Minimum Range:
20 meters
Range Discrimination:
20 meters
RF Transmit Frequency:
9410 ± 30 MHz