Well also Irish, Spielberg didn't exactly have a functioning shark of a machine, so the crew had to do with what they had...which improved the movie considerably.

Actually, Spielberg was supposed to direct the PATTON-wannabe epic biopic MACARTHUR...but reportedly the Beard didn't want to deal with shooting on 3 continents on such a big picture that was supposed to follow the massive success of PATTON.....anyway, MACARTHUR turned out to be a mediocre bloater with only Gregory Peck the only interesting thing about it.