james caan play a marine captain and who just lose his submarine and crew of fifty men during ww2 . he be assign to supervise a training mission in scotland for a new type of submarine and to be use against the german . i can not say that submarine x 1 be entirely un watchable represent it have a good pace and isn not too long either . but who write this story and why be james caan in it . i just can not believe why they make such film and without a point and without a story . there isn not a person in this film with a decent line . it not only enough that there isn not much of a story ( training and training and a brief encounter with the german ) and the film be also fill with silly dialogue and stupidity all along . a total waste of time . 4/10 .