The ultimate tactical race compass and windshift indicator. Its two-tier display shows your heading, how far you are above or below the mean course, and how much you are being headed or lifted. It will enable you to establish quickly and easily which is the favoured end of the start line, and will help you sail the shortest distance to the windward mark. Downwind, you can see how far off dead downwind you are, and when you should gybe for optimal VMG. Features No wires, or connections to make Solar powered (300 hours autonomy) Twin displays with super-large digits Backlighting (3 levels with auto shut off) Battery level indicator Totally waterproof (submersible to 10m) Shock resistant Lightweight Full calibration Specifications Height of digits: 27mm (upper pane), 18mm (lower pane) Backlighting: 3 levels with daylight shutoff. Power: Solar power 300 hrs autonomy by day, 7 nights at brightest backlighting. 20 nights at economy backlighting without charge. Weight: 435g Operating Temp: -10° to +60°C Data Displayed Compass heading Wind shift indicator Line bias Race timer