I learned this this past Saturday at Sardis. (Most of you probably already know this).

I established a track that I wanted to concentrate on fishing the ledges on an underwater river. After I determined the limits of my track I used the TM for the downwind run and went back to the start with the big motor. I had my big Brilla up and I went from 10 on the terror trying to pull going into the wind to 5 going with the wind. I know I saved at least an hour on my batteries. Hope this helps someone.