We were just on a "small" cruise ship (Oceania Regatta) visiting French Polynesia and Hawaii. Ship carried only 650 passengers and, at about 30,000 tons, was some 13 times more displacement than my old DDs! Loved navigating, back in the days when we still used a sextant, counted on Greenwich Mean Time and plotted our positions out with pencil on a real paper map. Now it's press one button on a GPS system and get your instant fix. All too easy, until the electronics go down. The Naval Academy doesn't even teach sextant anymore.
I entered the Foreign Service in 1966, missed Nam.