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Field ArTillery - US Army Center Of Military History

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Direct Fire<br />

Gun A<br />

Aiming Point<br />

Diagram–Direct and Indirect Fire<br />

a<br />

Gun B<br />

Indirect Fire<br />

b<br />

Target<br />

Telephone Line<br />

Observer<br />

a The layer of gun A clearly sees the target through the telescopic sight. At ranges up to 1,500 yards,<br />

the engagement is accurate and decisive, although the gun is exposed to counterfire.<br />

b With cannons emplaced in defilade, the layer of gun B is unable to see the target; requires the<br />

gunnery team’s coordinated efforts; and, based on an estimated range and observer then adjusts<br />

fire by trial and error. Overall, the process of locating and drawing counterfire is slower.<br />

Source: Adapted by author from Shelford Bidwell and Dominick Graham, Fire-Power (London:<br />

George Allen and Unwin, 1982), p. 8.

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