http://www.washingtonpost.com/wp-dyn/content/article/2007/08/13/AR2007081300911_pf.html
It’s important to not let your million ton shipping freighter exceed 25 knots, or to use it as a water skiier.
Hitting the boats I doubt is the problem, hitting the propellers sounds more likely. And if it’s going 5 knots or 80 knots, the propeller is just as deadly.
“save the Whales”! Collect the whole set!