interesting....but here we go again with the tether for multihull including while trapzeing. I am not a fan of the tether. To my knowledge, I don't know of a single instance where it has provided anyone an advantage. I feel that it is much more of an entanglement liability and serves to potentially keel-haul you if you fall overboard. I've been personally involved with an offshore capsize with a dangerous entanglement issue that was close to becoming life threatening. I just can't imagine any scenario that I would want to be tethered to the boat in sailing conditions.

Having one "on my person ready and available to be used", however, I think is smart - it could come in handy in all sorts of situations.