Raymarine ST1000 has a waterproof case, backlit LCD panel and 6 button key pad. Can be used as a stand-alone pilot or with a SeaTalk/NMEA GPS. AutoTack lets you handle the sheets, while the pilot tacks the boat and Auto Sea state intelligently keeps the boat on course while conserving power. Microprocessor control. Built in fluxgate compass. Suitable for Boats with a maximum displacement of 3000Kg (6600lb)