Character mistake: Stallone says he knows they are in the Northern hemisphere because of the way the water goes down the toilet. The Coriolis effect has no impact on water in the toilet.
Character mistake: Schwarzenegger welcomes Portos saying "Your name. The fourth Musketeer. It's a good name." Port (h) os was one of the original three musketeers in the eponymous novel. To be "the fourth", his name should have been D'Artagnan. (00:31:55)
Character mistake: Error in reading of the "sextant." Mark is somewhere at 33°, but Stallone said 30° 22 minutes. I suppose they thought there were 60 minutes between marks 30 deg and 40 deg (actually there are 10°) and calculated the difference at 22 minutes. (01:13:55)
Character mistake: The notice of hold for the check says it's from the Southern Grand Caymen Bank. I wouldn't trust a bank that can't spell the name of the country it is in (Cayman Islands). (00:57:50)
