On Tuesday, February 11, 2020 at 8:51:26 AM UTC-7, Waveguru wrote:
This seems to happen every few years, where the tow plane makes a left turn and the glider make a right and they come around and collide. I changed the way we do it here so that the glider only makes a slight right turn, and then keeps his eye on the tow plane, so that at least one of the pair of planes can more easily maintain separation. When both planes make a 360° turn, neither of them can see the other. This kind of accident is the result.

Boggs

Agree with your logic. As a tow pilot and glider pilot I have circled around on several different flights over the last 7 years only to be too close to other aircraft. I began to do and teach what I saw at a contest a few years back: Tow plane descends and continues straight before maneuvering back toward airport (efficient.) Glider circles and (re)gains visual contact before continuing flight. Make the student verbally call tow plane out before moving onto soaring or lesson. Creates maximum separation.
Warning: This must be part of (US) preflight briefing or one pilot or other is going to say "What in the heck is that guy doing?"
Cheers
Gene