Might be harder to do today, than in 1985. But the cruise ships today have hundreds in the crew from all part of the world.
Four heavily armed Palestinian terrorists in October hijack the Italian cruise ship Achille Lauro, carrying more than 400 passengers and crew, off Egypt. The hijackers demand that Israel free 50 Palestinian prisoners. The terrorists kill a disabled American tourist, 69-year-old Leon Klinghoffer, and throw his body overboard with his wheelchair. After a two-day drama, the hijackers surrender in exchange for a pledge of safe passage.