Raymarine 'Tacktick For Racing' Range. No holes or wires! You want the best chance of crossing the line first. This means you need instant access to accurate data, and displays that are absolutely reliable. Tacktick instruments excel on all fronts. They display all the data you'll ever need and have user-configurable pages, crucial for racing performance with no wires through your hull or down your mast. Tacktick T070 Race Master .The ultimate tactical race compass and wind shift indicator. Its two-tier display shows your heading, how far your above or below the mean course, and how much you're being headed or lifted. It will enable you to quickly and easily establish 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 where you should be for optimal VMG.