Originally Posted by Der Teddy Bar

I am certain that it only effects the crew.

These are the NYGM values...
[DAMAGE]
OpenComp=10 ; was 1
PartiallyOpenComp=6 ; was 0.5
EnclosedComp=0.1 ; no change

With these values your deck gun and non shielded AA crew are very suseptable to 20mm canon fire.

The coning tower are suseptable to canon fire.