Specifications


Specification	Measurement
Weight	GMR™ 18 HD3 and GMR 18 xHD3: 7 kg (15.4 lb.) GMR 24 xHD3: 8.7 kg (19.2 lb.)
Operating temperature range	From -25 to 70°C (from -13 to 158°F)
Minimum safe operating distance¹	100 W/m² = 0.08 m (3.15 in.) 50 W/m² = 0.11 m (4.33 in.) 10 W/m² = 0.25 m (9.84 in.)
Input voltage	From 11 to 32 Vdc
Case material	Thermoplastic resin
Maximum antenna rotation speed	GMR 18 HD3: 24 RPM GMR 18 xHD3 and GMR 24 xHD3: up to 60 RPM
Power output	4 kW peak
Transmission center frequency	From 9.38 to 9.44 GHz
Beam width	GMR 18 HD3 and GMR 18 xHD3: 5.2 degrees horizontal, 25 vertical GMR 24 xHD3: 3.7 degrees horizontal, 25 vertical
Minimum range	20 m (66 ft.)
Maximum range	GMR 18 HD3: 36 nm GMR 18 xHD3 and GMR 24 xHD3: 48 nm
Power consumption (typical)	Standby: 15 W Transmitting: 40 W
Fuse	7.5 A
Compass-safe distance	GMR 18 HD3: 1.2 m (3.9 ft.) GMR 18 xHD3: 1.1 m (3.6 ft.) GMR 24 xHD3: 95 cm (3.1 ft)
Water rating	IEC 60529 IPX7²

¹ When it is transmitting, the radar should be located in a position on the vessel that is at least this far from people. (IEC 60936-1, clause 3-27.1, specifies the maximum distances from the antenna at which radio frequency (RF) levels can be expected.)

These minimum safe distances apply for a transmitting radar with a rotating internal antenna, and are much larger when the antenna is not rotating. If rotation of the antenna is obstructed for any reason, the transmitter will automatically turn off.

² The device withstands incidental exposure to water of up to 1 m for up to 30 min. For more information, go to www.garmin.com/waterrating.

GMR™ HD3/xHD3

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Specifications