The ocean and sea salt water marine environment is highly corrosive,and dangerous, far differant than the fresh waters of rivers and lakes I can tell you.In the old days sailing ships had crews of experienced men who worked day in day out inspecting, cleaning, repairing, replacing, making thier own rigging.At sea in the Navy we were always fighting corrosion, it was socking how fast things became corroded. In time nothing on a ship lasts forever, the bottom all too soon is fouled, rope decays, frays or becomes unusable (I need to replace some of the rope that I bought only a few years ago, tackle wears out, motors age, even synthetic resins will in time come apart (a very long time) and these days with so much being manufactured overseas in third world slave wage countries, things like marine grade stainless steel are being reprocessed from who knows what and how and by who. I will try my best to go with the tried and true,to do preventative maintanance, I will be prepared replace anything and everything, have back-ups.It is the only reason that I replaced my damaged aluminum and plexiglass portlights with solid bronze 1" thick glass portholes, not to be salty although I like the look, they were also used and cheap, but they are tried and true, made for the marine environment.There seems to be some rule at sea that never fails...anything no matter how small that is unsafe or not right will get you.