 At the end of the war , having been relegated because of his physical condition to the amphibious forces in the Pacific , he had the adventures which are reported on the screen in " Mister Roberts " . " The Bucket " of that motion picture , stage play , and the novel is actually the A.K.A. 54 , the U.S.S. Algol . The captain so brutally characterized in the picture is actually Lieutenant Commander Axton P. [ sic ] Jones . L. Ron Hubbard as " Mister Roberts " was with the ship less than a year , however , and contrary to the script , was not killed at Okinawa . 
