As
@Pieter Boelen said, open PROGRAM\Ships\Ships_init.c
Once you open it, replace all
Code:
refShip.QDeck = "ShipDeck3";
With
Code:
refShip.QDeck = "ShipDeck2";
Then open your game, load your desired game save, press the F11 key and save.
You press F11 in order to make the game reinitiate the ships stats and save well to save that you reinitiated the ships stats.
Now all ships that have the damaged deck will now have the deck you replaced it in the code.
If for some reason you need to load an older save you are going to have to press F11 again so that save also gets the changes.
Good luck on the sea!!!