Not that complicated
Posted by: gjf12 on Jan-30-13 11:26 PM (EST)
And publishing is not required. Just mount your GPS on the deck and paddle at, say, 4 kts for a minute holding the speed. Then increase effort till speed increases to 4.1 kts, easily done. You will see that a 0.1 kt change can readily be seen, and maintained. In 10 kts cross wind on a lake or bay, you can readily see a 0.1 difference between skeg up and down.
Out on the ocean with swell and wind waves the GPS readout is noisy and cannot be used to hold a constant speed, or determine the benefits of the skeg, one way or the other.