Join Date: Apr 2006
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Marc, there's a commercial product akin to that idea. They take a chain from the tripline mounting point, to the regular anchor chain, with a little slack and a shear bolt (shear pin) sized for your anchor chain, that now connects to the normal attachment point on the anchor stock.
The idea is elegantly simple. If your anchor is foul, you can come back over it and the shear pin will shear off, so your chain is now connected only to the tripline mount--allowing you to drag the anchor back out from whatever fouled it. In theory.
Saw an ad for this someplace a few weeks ago, no idea where or what the name was, or how well it works in the real world. But, given a shear pin or a couple of shear "links", anyone could rig up an anchor the same way.