New Clam Cleat...

[L&VW]

"New" to me, anyway.

Holds your "set" tension, then releases when that tension is reached. Member Mixmkr can't possibly capsize using this item.

Explaining is difficult you'll have to see the pictures.

Auto-Release Clamcleats

 

[LaLi]

Clamcleat has made these for decades. As the illustration shows, they're intended for rudder downhaul lines - water pressure won't release them, but hitting something solid will. Not applicable for the Sunfish, legal in the Laser, but I have never seen any elsewhere than the RWO catalogue...

_