I carry a folding knife in the pocket of my PFD, even though I have the Magic Marine curved knife, mainly for anybody trapped under a tramp, it would instantly resolve a serious problem. I have a mate who's daughter surfaced after a long time trapped under the tramp and it scared the crap out of every one concerned. I definately uncleat the traveller, main and jib but also release the downhaul as that does make a difference. I've never been pulled on the 5.7 or 5.8 in a serious way