yeah, I think you have to go in yourself
not to encourage people to take chances, but I was totally soaked and wet, and in and out of the water for 40 minutes in -12C trying to get my snowmobile out before I felt messed up and had to seek shelter, so if you keep a level head it's not like the cold water kills you instantly
although after that incident I didn't feel warm and normal until 3 days later, lol
that was in a boy o bouy 1 piece, I wore it out, now I have a Mustang 1 piece, survival suits are a good investment IMO