United States naval proving grounds in Dahlgren, Virginia. Flak burst as anti aircraft guns are fired. Explosions occur in water. A building at the proving grounds in Dahlgren, Virginia. Men inside the building make preparations to fire a 5 inch projectile in a pit having a diameter of 25 feet. A man places a projectile in a box and after the detonation wires are checked the pit is filled with sawdust. Sawdust is dampened with water. Saw dust being detonated. Saw dust pass through various machines as fragments are recovered. A magnetic roller being used to recover fragments. Fragments being weighed and sorted. Men work on machines as they sort out fragments. Fragments being arranged and photographs taken to keep a record.
United States naval proving grounds in Dahlgren, Virginia. A ship with snow on its deck underway at sea. A man works on controls at the naval proving grounds in Dahlgren, Virginia as he tries to maintain temperature and altitude. Men in the cool chamber as they work on a machine gun.
A training film about the activities being carried out at United States naval proving grounds in Dahlgren, Virginia. Photographs of ancient ships at sea. An aircraft lands aboard an aircraft carrier. View of the U.S. naval proving grounds in Dahlgren, Virginia. An artillery at the ground. Velocity towers with coils used to determine velocity of a projectile fired. A number of booklets with a sign on them that reads 'AA range table'. Main battery building with the Firing officer at the bridge as he prepares for firing a 5 inch 38 caliber artillery. Men talk over phones as they check their communication instruments. A range boat stands by to ensure clearance of the area before artillery fire. Firing officer checks the firing circuit. Men prepare to record the velocity of the shell through photographs. Coils being raised to correspond with the angle of gun barrel. At the projectile house projectiles being numbered, weighed and measured. A balloon with a radio fixed to it being released to get weather information. Men at the gun mount as they magnetize the shells. Firing officer makes safety checks and 5 inch 38 caliber artillery being fired. Technicians record the velocity of the shell photographically. Photographic strip being developed. Technicians undertake calculation of data range table with the help of a map. Men unroll a map and work on it.
United States naval proving grounds in Dahlgren, Virginia. Different artillery being fired under adverse conditions to test them. Smoke rises due to fire. 55 rounds being fired per minute from a 3 inch artillery gun to test its life expectancy and erosion pattern.
United States naval proving grounds in Dahlgren, Virginia. Armor and Projectile laboratory building at the naval proving grounds. A sign on the building reads 'Armor and Projectile Laboratory' Men at the laboratory work on instruments and machines to determine the hardness pattern of projectiles, to fabricate small number of projectiles and develop new inert loading for rocket heads.
United States naval proving grounds in Dahlgren, Virginia. 8 inch smooth bore gun being fired at the proving grounds as smoke rises. Gun being fired at target boards. 8 inch smooth bore being fired to ensure accuracy and to save time.