Not that I've ever heard of. Doesn't sound like a real good idea. It'd be a real chore to get out of there if you wanted to run wires up to the masthead, etc. I thought I should have floatation when I was new to the boat, so I filled it with those styrofoam shipping peanuts, which also quiets the wire slap in the mast, and plugged the ends with a chunk of foam from one of the swim noodles the kids play with at the pools. I don't think I would worry about it now, unless the wire slap was annoying.