The ultimate tactical race compass and
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.