In the center is the gun carriage, with its very powerful recoil apparatus.

I stooped under the overhang of the turret armour from the barbette and climbed up through an opening which allowed no spare room for the generously built, and out of the dim light appeared the glint of the massive steel breech block and gun, set in its heavy recoil mountings with roots of steel supports sunk into the very structure of the ship.