Compact, streamlined dome radar delivers 4kW transmit power and clear echo definition at all ranges and is a good choice for boats with limited space.Dynamic Auto Gain automatically adjusts to your surroundings for optimal performance in all conditions. Dynamic Sea Filter automatically adjusts gain to changing sea conditions. Overlays radar image on the chartplotter map page (autopilot or heading sensor recommended for best results). Features 8-bit true color resolution for a clear presentation. There are no complex user settings, and its easy to install and start using.Key FeaturesCompact: Streamlined 18" 4kW dome radar can easily be mounted on a radar arch or up a mast8-bit true color resolution for a clear presentation on your chartplotter screenPowerful: Delivers 4kW transmit power and clear echo definition at all ranges to enhance situational awarenessAutomatic: Dynamic Auto Gain automatically adjusts to your surroundings for optimal performance in all conditionsAdaptive: Dynamic Sea Filter automatically adjusts gain to changing sea conditionsIntuitive: Overlays radar image on the chartplotter map page (autopilot or heading sensor recommended for best results)Vigilant: Provides MARPA target tracking when combined with a multi-function display and heading sensor (sold separately)SpecificationsTransmit Power: 4kWMaximum Range: 36nmMinimum Range: 65.6' (20m)Horizontal Beamwidth: 5.2Rotation Speed: 24rpmPower Consumption: 3W standby; 18.1-24.4W transmitVoltage: 11-35V DCDimensions: 20"dia. x 9 7/8"HWeight: 17lb.Waterproof Rating: IPX7Warranty: Two yearsWhat's in the BoxGMR 18 HD+ radomeMounting hardware kitPower cable (15 m/49.21')Network cable (15 m/49.21')Installation instructionsMounting template