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