Specification :

GMR 18 HD
Sharpen your radar picture with high definition performance. The GMR 18 HD radar offers a whole new level of radar scanning capability.
Physical & Performance:
Unit dimensions, WxHxD: 45.7 cm diameter, 23.6 cm high ( 18" diameter, 9.3" high)
Weight: 7.2 kg ( 15.8 lb)
Waterproof: yes ( IPX7)
Antenna sweep: 24/ 30 rpm ( dual rotation)
Transmit power: 4 kW
Power input: 10.5-35 V DC, 33.5 W
Beam width: 5.0° horizontal, 25° vertical
Maximum range: 36 nm
Minimum range: 20 metres
RoHS version available: yes
Features:
Garmin Marine Networkâ„¢ compatible: yes
High definition ( outstanding target separation with less screen clutter) : yes
MARPA target tracking ( collision avoidance) : yes ( requires heading sensor; sold separately)
Guard zone alarm: yes
Additional:

Connector with removable collar