What should you do if you fall overboard into cold water?

We are asked what will we do if we fell off from the ship to the water or if we fall overboard into a cold water. Well, the best answer is that we should try to "reboard going back to the boat even if it is already swamped". We should swim harder and reach the boat and start to reboard into the boat again.

It is less likely that the shoe will slip while someone is walking