A Navy "Commander" wearing Lt. bars, a 20mm gun on deck that hasn't been used in decades, museum display placards not covered, horrid CGI. And that is just to start. Extremely low budget, no Navy tech consultants, a very dodgy plot line.
Just a very poor movie all around.
We ex-Navy guys can at least get a good laugh from this howler. Almost as bad as "The Philadelphia Experiment".