20mm cannons from Britianna Miniatures, one on each side, for light AA defense.
The rear 37mm gun in it's tube for medium AA defense and small boat destruction. Gotta get them while they are a ways away, the gun does not bear close in.
From the stern looking forward on the starboard side. Canvas cover for the 37mm gun is visible on the wall of the deck house and a bit farther along the one for the 20mm AA gun can be seen too. Stairs and railings are all new.