Is it Norman's boss in the War of Doom?
Easy! Before the deck will be about a small boss, Vulcan two magazines is enough, then replenish the Gauss and Vulcan ammunition, then the old boss will emerge from the sea.
There was a big hole on the deck, and in front of the hole there was a board for cover, and under the board there was an endless supply of missiles.
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You must have that test weapon, Helena and Seck sit on the vtol and they will remind you.
Take out all four of the boss's turrets with missiles or Gauss rifles, then lock one side of the battleship with an experimental weapon, and fire.
Remember to keep an eye out for giant octopuses in the sky and alien monsters on deck.
Gauss for heaven, Vulcan for earth.
Now lock on the other side of the boss and fire. Don't worry, there's the middle.
The boss will come up on top of you, and it's time to shift positions, and Helena will remind you to blow up his incubator, which is the thing in the middle, and after that, lock it in the middle with your experimental weapon, and fire! All right, finish the job.
At this point, Seck will park the vtol on the deck and rush up as fast as he can, followed by the boss and the sinking of the aircraft carrier and the tragic music.