Dunk as to get wet in the water, pushed off the float, or just plain immersed is something I avoid. Now it’s one thing to pass from a Pollywog to Shellback when you cut the Equatorial Line. The water is at least warm. But here in New England, immersion is a bit more of a thermal treat – if you are a polar bear.
I remember the lectures on hypothermia from the Navy.
It’s preferable to stay dry.