D
Deleted member 36384
Guest
I believe this concern falls squarely in that catagory of preparing for a failure you won't survive. If you are working at the mast when the boat rolls over (the probable cause) and you are one a jackstay you are also probably dead from the rag doll you just did. You are increasing risk working at the mast to protect against a very unlikely (that you are working at the boat at the exact moment the boat rolls) and probably unsurvivable risk. Rather like not wearing a seatbelt because it might trap you in the car (far more likely, in fact).
I disagree with your assumption that it is multiple risks, the weather and falling overboard is irrelevant to the risk of being attached to the mast if it decides to fail for whatever reason. There is no good reason to have jackstays attached to any part of the rigging / mast. If one is going to optimise a jack stay arrangement there are many things that can be done without attaching them to the mast.