11. Under a continuous mortar barrage, Davidson kept shooting until advancing Marines masked his arc of fire . 12. Both turrets could provide common fire in front and rear arcs of fire ( 100?each ). 13. Combining rigging, masts, and turrets proved complicated if rigging was not to impede the turrets'arcs of fire . 14. Surrounding this is the arc of fire . 15. To maximize the gunner's arc of fire , the rear cockpit was set lower in the fuselage than the pilot's. 16. The turrets had a maximum elevation of + 15?arc of fire and the center turrets could cover 180? 17. The forward turrets were inboard and above the outer turrets which provided both turrets with good arcs of fire . 18. Fewer of the large guns could be carried or mounted, and a wider arc of fire was required to compensate. 19. If the gun had a very wide arc of fire then more that one paralleloscope was required for each gun. 20. They had an arc of fire of 360? which meant that they also could engage any target within their range.
