Second appearance in consecutive years portraying a captain for actor George Kennedy who plays ship Captain Ashland in this 1980 film and had portrayed Captain Joe Patroni for the fourth and final time the previous year in The Concorde... Airport '79 (1979).
When the group first comes up upon the ship after it sunk the cruise ship, you see one of the windows open up, you can clearly see a person's arm when he opens the window, it is supposed to be opened by a ghost, which it clearly isn't.
At the beginning, just after the collision, the surviving characters are seen drifting on the ocean on a wooden platform. George Kennedy's character is plainly visible lying down with the group, even though he hasn't yet been pulled out of the water! He appears from below the water about two minutes later.
At the 51-minute mark, there is a sequence in which the character played by George Kennedy emerges in a dark uniform atop the ship while the character played by Richard Crenna looks from below. During three separate long shots of Kennedy, a crew member and camera are plainly visible to the left of the screen.