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Carabiners as jib hanks? (and other uses)
New boat owner here (1969 Ericson 23). I'm going through all the goodies left on the boat from the previous owner, and among them I find four(!) headsails. All are hank-on type, and my headstay is non-furling. All the sails have Swedish snaps.
Unfortunately, all of the snaps also came with a thick coat of green corrosion. From experimenting, I've determined that soaking in a solution of vinegar and water will take off the corrosion. However, rather than unbend all the snaps, soak, and replace them all, I was thinking...
And I know this might be really dumb (I'm prepared for that), but I can't see why...
Why can't I use carabiners instead of Swedish snaps?
It seems like an obvious solution--lightning fast one-hand attachment to the headstay (instead of the two hands required for the Swedish snap), easy detachment, cheap, strong, versatile. The swedish snap honestly looks like a seriously outdated design, with the fact that it doesn't create a full loop for strength (like a carbiner does), that the spring inside can easily fail and then it doesn't close, and that to attach or detach requires you to bend the metal, weakening it.
My only hesitation is that I've never seen carabiners used as hanks. So either it's not done because it's not "how things are done", or there's actually a good reason for it. Are there downsides?
For that matter, looking around my boat, I can see all sorts of marine-type shackles where it seems a carabiner would perform much better (lifeline attachments, the ...thing.. that hangs my boom from the backstays, etc.)
Why do we see no carabiners in the boating world?