The compact Garmin GMR 18" dome radar combines ease of use with powerful scanning features that work to maximize your confidence and situational awareness on the water. Features:• 4 KW power output, 36 nautical mile max range• Space-saving 18" dome• Marpa target tracking• Dynamic auto gain and sea filter• Dual-radar support• Quiet dome drive motorIn the Box:• GMR 18 HD3 dome radar• Power cable (15 m/49.21 ft)• Network cable (15 m/49.21 ft)• Mounting hardware kit and template• Installation instructionsGeneral:• Dimensions: 20" diameter, 9.8" high (508 mm diameter, 248 mm high)• Weight: 7.0 kg• Waterproof: IPX7• Antenna length: 17" (43 cm)• Rotation Speed (RPM): 24 rpm• Beam Width: 5.2° horizontal, 25° vertical• Maximum Range: 36 nm• Minimum Range: 20 meters• Radar Type: RadomeElectrical Features:• Power Input: 11-32 v DC• Power Consumption (Standby): 15 W• Typical Power Consumption, Transmitting (Normal Mode): 40 W• Transmit Power: 4 KWRadar Features:• Overlay: Yes• Dual Radar Support: Yes• Auto Gain: Dynamic• MARPA Target Tracking: Yes (requires heading sensor, sold separately) Marpa target tracking Dynamic auto gain & sea filter Dual-radar support | Garmin GMR 18 HD3 18" Radar Dome