>but to WHAT DECIMEL point are you talking about when you are talking about accuracy?

Todd,

Good point. I would follow with the question, For what purpose are we considering the viability of GPS?

If we're talking navigation, considering a device that can get you within a boat length of your next waypoint/destination, GPS is pretty darned amazing.

If we're talking about catsailors arming themselves with recreational GPS units to try and settle the score over which boat is faster, well, I think it's opening a bucket of worms