According to USA Today, during the past 15 years, the retirees cruised annually on Carnival ships involving about 880 days, adding up to 2.5 years at sea.

That’s about the same amount of World War 2 time your travel4seniors.com editor spent in the U.S. Navy. Of course, it isn’t likely anyone was shooting at the seagoing seniors while they were on the briny. Nor did they have to fire anti-aircraft guns, scrub the decks or clean up the mess hall.