On Fri, 24 Mar 2006 02:50:38 GMT, "Roger Long"
wrote:

I had my dinghy come unhooked about a dozen times last year due to
exactly this reason. It can happen with any spring latch hook, even
on a jackline if the line gets around it the right way. This is one
of the reasons I was asking about snap shackles.

I've seen lots of snap shackles release accidently for one reason or
another.