Just caught part of the Discovery Channel's "Myth Busters". They took an
older 13' Boston Whaler and measured it's top speed at 23 mph via GPS with
(looked like) about a 25 or 40 horse Merc.

Then, they strapped the boat securely to the trailer and launched the boat
with trailer attached. It actually floated fine with three people aboard
and they got it up to 4.8 mph at wot.

Proved the myth that it could actually happen.

Eisboch