I think I have a solution to what happened.
What do you think?
I had an approximately 90 degree current of at least 1 knot from point 1 to point 2 but since I was in the lee of the Island perhaps it did not affect me much.
From Point 2 to Point 3 I suspect the current changed direction from the 90 degrees because of the outflow from Clinton harbor, the entrance of which if Half Acre Rk.
This outflow headed me up.
From Point 3 to point 4 this current is sweeping me towards the 49 degree which is a little surprising as this is about what I got from point 1 to point 2.
At point 4 I'm not sure what happened but I was now doing 69 degrees.
I was at point 4 at 2:10 and at 1:23 in the center of the sound the wind changed to the east 20 degrees. Maybe it took a little while for that change to make it to Madison.
Maybe the wind slacked so the current vector was stronger.
I only gave it 4 minutes before I turned on the motor as I had a sick passenger so while I don't know for sure at least I have a theory.
Last edited by davidpm; 08-01-2011 at 10:34 PM.