The KVH AutoComp 1000 Digital Fluxgate Sailboat Heading Sensor offers a ± 45° variant to accommodate the heel of a sailboat. It is a stand-alone heading sensor with continuous automatic compensation for heading input to autopilots, GPS, video charts, radars, computers, and other electronic instruments. It can be used as a heading sensor to obtain radar overlay on certain Raymarine HSB2, Northstar, and Furuno NavNet Products. It outputs all data in NMEA 0183 format. 2.5"H x 6.3" base. Two-year warranty.