Magoo Goes Overboard (1957)

Mr. Magoo and Waldo are on a cruise aboard an ocean liner when the near-sighted MaGoo accidentally falls into the ship's swimming pool and thinks he has fallen overboard. When he tries to rescue one of the swimmers, the ship's captain jumps in and rescues Magoo. The grateful---and talkative---MaGoo informs the ship's captain that he will inform the ship's captain of his good deed and, when last seen, MaGoo is heading in the direction of the swimming pool.