On Wed, 24 Jun 2009 08:16:38 -0700 (PDT), Frogwatch
wrote:

I suspect that open/low transom with a cabin without bridgedeck is a
really bad idea because once you got significant water in the cabin,
you're a goner.

Absolutely right.

Some sort of sturdy cabin closure is also a good idea, perhaps like
the drop boards in a sailboat companionway, with sliding bolts to hold
them in place. You might be able to survive a capsize with something
like that.