Here's the setup: The crew lowers the two Zodiac boarding platforms, gets the safety rescue boat ready at one and uses the other as a launching platform for our foolishness, makes us sign a waiver that says they are not responsible for any harm that comes from our lack of good sense, attaches a recovery rope to us should we pass out or some other nonsense as the result of us slamming into the freezing water, and we're free to jump.

BTW, this jumper is (obviously!) not me. This is some unknown (to me anyway) fellow passenger who did a particularly elegant swan dive in pursuit of her madness.