As a WWII history buff, I try to watch every WWII film I can find. This one was watchable, but for the informed it was more for comedic effect and an understanding of the racial prejudices of the time than for anything else.
I don't even know where to start with this one but it plays to all of the boogeymen of the immediate pre and post Pearl Harbor attack with it's focus on subversion and sabotage when we later learned that even the Japanese themselves put little faith in the Japanese-Americans in Hawaii.
Perhaps the most laughable aspect was the presentation of a SINGLE Japanese aircraft carrier as being capable of the destruction wrought at Pearl Harbor, when, in fact, it took SIX carriers and on top of that, they portrayed the carrier as operating completely ALONE, when nothing of the sort would've happened.
There is also a scene in which the US Submarine remains on the surface with a single gunner dueling with the attacking Japanese plane when Navy doctrine would've had the sub crash diving upon detection of the incoming plane.
All in all, there are simply too many factual errors to even believe that this film actually had a technical adviser... at least one who had ever gone to sea in anything bigger than a rowboat! The only misinformation missing from this film that I can see is that they didn't try to pin on the blame on FDR as many other crackpots did!