37-mm AA Gun Materiel — TM 9-235

This manual contains technical information required for the identification, use, and care of the materiel. The 37-mm Antiaircraft Automatic Gun M1A2 is a high-velocity antiaircraft weapon of the long recoil type . The gun can also be fired manually by changing the setting of a foot firing mechanism which is incorporated in the gun carriage. The carriage is a 4-wheeled trailer carriage capable of being towed 50 miles per hour over good roads. The carriage is lowered to the ground for firing and raised to the wheels for traveling by means of four counterpoise cylinders . Antitank firing as well as antiaircraft firing is possible, as a maximum depression of minus 5 degrees and a maximum elevation of plus 90 degrees can be realized when elevating mechanism is manually operated . A remote control or "off-carriage" system of pointing the gun in firing azimuth and quadrant elevation is possible on the Carriage M3A1 through data furnished by a Director M5 located approximately 13 feet from the gun. Power is furnished by a motor-driven generator, also designated as M5.