[quote=@baskets]
there are three cannons, actually: the stock cannon at the top center of the "ring" of Drifter IV, and two more cannons Sai had added, one on each "arm" of the ship. all cannons are controlled from the Weapons room, though.
[/quote]

So could one person control all three cannons from the weapons room? Or does it need three pairs of hands? Or do they manually control them like you see in the movie? ...... sorry for all the questions, just want to have all the info before making my post :)