One of the new single chip microcomputers and a new single chip A-D converter have been used to help a small boat owner trim the sails and steer to improve the velocity made good to windward. The system also could have been programmed for reaching and running sailing conditions. The readily reprogrammable memory will make it easy to add further modifications and sophistication. Although use of the instrument does not assure a first place, it should help a knowledgeable skipper get his boat into the groove. With its low power and small size it could be used on any boat that could support battery operated instrumentation.

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