^ I didn't say "dead reckoning" specifically; I said "old-fashioned navigation skills and have the correct charts and gear". In aviation, it is required to have the right charts and a magnetic compass and both pilotage and dead reckoning are a part of the tested body of knowledge. I am less familiar with sailing, but I am pretty sure a magnetic compass and charts are required for anything more than a few miles from the coast almost everywhere. Also, it is kind of disingenuous to say that charts aren't printed anymore, as both aeronautical and nautical charts are constantly updated and can be obtained electronically and used either on an electronic device or printed and, at least in the case of FAA charts, can be obtained on paper from "approved print providers". This is pretty off-topic, though, so if you would like to further discuss the wisdom of relying solely on GPS without some old-school redundancy, feel free to PM me...
By the way, I say this as someone who has hundreds of hours of pilot in command time and has private, commercial, instrument, multi-engine and seaplane ratings.