[PapaBear3625]

If the human lets go of the dive plane, the board dives like you wouldn’t believe, and stabilizes at about a 45* down angle. Quite a sea anchor. You have to stop the boat to pull it back in.

That can be considered a feature. It immediately signals the boat that the diver is no longer holding the plane.

[Travis McGee]

Somebody should be watching the diver at all times! If he doesn’t come up in a minute, there is a problem. The board won’t come up without a person holding on.