FIRING ANTIAIRCRAFT GUNSE&MP 44.026 Electricity - Communication no date Training routine of a Coast Artillery Antiaircraft Regiment somewhere in the Mojave Desert, California. When the guns have been wheeled into firing position, the instrument known as a director, tracts[sic] the target, computes the necessary data, and the height of the plane, etc., and directs the fire of the gun. PHOTO SC-131391 Original Caption by Science Service |