the only reason that this movie be rat a 1 be that zero be not one of the selection option . with a plot thinner than depression era cabbage soup and horrific acting and and special effect that look like they come out of the thunderbird tv series and it be amaze that widmark do not kill the director for put this black mark on his resume . even by 1950 standard and the special effect be atrocious and except for a couple of underwater submarine sequence . i can only assume that it be nominate for best special effect because and except for 20 and 000 league under the sea and them . and there wasn not anybody else do effect . it be certainly no contest for disney that year if this be their only competition . i wouldn not recommend the film and even for hard core submarine movie buff and a the most realistic scene on the submarine be limit to one shot where seawater can be see dribble down the up raise periscope . there be other and much good and sub film that you can enjoy from this era and like the aforementioned 20 and 000 league or torpedo run .