A Palamino I know only flies 4 engined aircraft. Upon quizzing, he says " 'cause there ain't no 5-engined ones".
Domestic economies, however, oft dictate the use of one's trusty single (as mine), so the short crossing for me. The ferries sometimes overtake me, but if the worst comes to the worst, I hope the sea-gazing wave-vomiters will notify a responsible person if I glide past their effluent path on my way down to a gentle plosh adjacent to their oil-calmed waters.
Seriously, always go for a sailing boat...they are much more likely to see you and be able to stop.