Approved | | Drama, War
During WWII, a submarine's second in command inherits the problem of torpedoes that don't explode. When on shore, he is eager to win back his ex-wife.
The problems with submarine torpedoes shown in the movie are accurate. A poorly designed and tested firing pin could malfunction on a good hit (that is, a torpedo striking within about 45 degrees of perpendicular to the side of the target). Poor hits (at a very sharp angle to the side of the ship) could often produce more reliable explosions. Finding the problem, while not performed by the submarine crews as shown, actually did occur in a similar manner.
Gee, that's the first time I ever saw a sub get knocked off.
After the first shore leave, the Thunderfish returns to action. It sinks the first ship it encounters. However, the ship that is seen through the periscope before the torpedoes are fired isn't the same ship that is seen sinking in the second look through the periscope.
In keeping with the submarine theme of the film: at the very start, we see a submarine periscope break the surface of the sea, then we see an officer looking into the view-port of the periscope, then we see the opening credits appear, as if being viewed through a periscope.
Republic Pictures released a colorized version on video.