Requiring an unobstructed view of the sky is pretty incompatible with sailboats anyways, unless you stick it at the top of the mast (where I expect it won't las

Requiring an unobstructed view of the sky is pretty incompatible with sailboats anyways, unless you stick it at the top of the mast (where I expect it won't last long). Then there's also the power requirements, which I haven't seen yet, but they'll probably be exceedingly difficult to meet for your average sailboat.