Board Thread:Questions and Answers/@comment-180.93.128.214-20150913115147/@comment-26460664-20150913131957

Imma copy my comment from the Tutorial: FAQ page that u had just posted....

[I have no idea why too; though i understand in real life, submarines do have a few mounted anti-aircraft weapons & artillery back in WW2. However, the weapon effeciency of these weapons are very low due to their low number of guns. I think this may explain why a few of your planes are shot down.]

It's just a theory, so i might be wrong.