GWX SH3 Deck gun disappears
 

I am in the middle of my patrol. I have to save and exit. I load my game and my deck gun is gone. I get back to base and there is no option for a deck gun on my Type VIIB. I go to weapons and the only thing there is light flak.
Anyone else have this issue? I searched the forum and got no hits on deck gun disappearing.
Thanks

Sorry, I messed up my description. My deck gun is still there, but when I try to man the deck gun it says that the forward deck is not active. Then when I get to port the option is not there for the deck gun weapon. Nor is the deck gun shown at all in port once I start my next mission.