I read an interesting article in Practical Sailor in which they compared the benefits of a Drysuit vs Survival Suit for offshore sailors. The conclusion was that Drysuits, the kind used by divers, kite boarders and paddle boarders, are gaining in popularity for good reason. Do you have experience with either on board?

https://www.practical-sailor.com/blog/Drysuit-vs-Survival-Suit-for-Offshore-Sailing-11605-1.html?ET=practicalsailor:e38999:125771a:&st=email&s=p_Blog112918

Vice Commodore, OCC 

Hi Daria,
One more thought: if cruising in cold water, the gear which allows one to stay in the water for at least 10-15 minutes (the time to cut away an ugly fused prop wrap with multiple dives), for me, is essential safety gear. Again, for me, if the water is below 10-12C/50-55F degrees a drysuit is preferable over wet suits. Having a hookah of some sort (I carry a dive tank with a 40 foot dive hose-tank stays on deck) makes any underwater work far far easier.
My best, Dick