I mean, not the worst movie on the planet. Pretty cheesy lines. If you have nothing better to do and like numb action movies from the 90's go for it. Lots of plot holes. (Spoilers ahead).
Why not just sink the thing to start with? How on earth is there only 1 old unusable shotgun in a command center for nuclear missile defense? They discuss only one way in and out of the command center through 2 reinforced doors, then later in the movie there's a simple access hatch to the roof? I mean I get it's fiction, but please try to make it believable fiction.