Originally Posted by JonEisberg
Yeah, this could do wonders for one's performance under sail, alright...
Maybe just me, but it just seems SO much simpler to keep your lines/sheets from going overboard, to begin with :-)
It's not so much keeping your lines aboard; I'm thinking more of the junk that's floating around out there. Every time I go beachcombing, I find swathes of netting, and line ranging from monofilament fishing line to hawser an inch in diameter. A couple of years ago, I found 100' of 3/8" three-strand.
I don't know the effect on boat speed, but losing the use of your boat for a week will sure put a crimp in your schedule. The cage pictured above is a home-made unit. There may be more efficient low-drag designs available. Maybe our boat-designer friends know something about them? It would also be helpful if manufacturers had a drag-coefficient table for their products, wouldn't it?