OK, if you are referring to a 20mm gun position on the deck, then that is not usable by the player. The game allows the two conning tower positions are AA guns, while the deck gun positions are deck guns. As such, only the one position can be used by the player. I don't know if we want to muddy the waters with another mod for each of the "twin gun" options with it, to where the player can shoot it, since its range is limited to effectively under 2800 yards, but it does work rather well as a barge or sampan buster...
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"...and bollocks to the naysayer/s" - Jimbuna
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