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.
A training film about the activities being carried out at United States naval proving grounds in Dahlgren, Virginia. Aviation ordinance being evaluated at the proving grounds. U.S. Navy aircraft parked on a field as 50 Caliber gun being fired to detect for possible jamming.
A training film about the activities being carried out at United States naval proving grounds in Dahlgren, Virginia. A centrifugal chamber where a 50 caliber gun is being tested for ejection performance. A table rotates as a man looks at a gauge. Men attach a bomb on an aircraft catapult to determine the strength of shackles. Bomb falls during the test resulting in shackle failure.
View of a desert, likely in Nevada. An atomic bomb detonates. A mushroom-like cloud from pillar of smoke forms from bomb site. The mushroom-cloud ascends to the sky.
View of desert with mountains, likely in Nevada. A tactical nuclear bomb explodes, momentarily covering the whole place with light. A pillar of smoke and fire forms a mushroom cloud from the bomb site.
Yugoslavians celebrating the Sixth anniversary of the founding of the Socialist Federal Republic of Yugoslavia in Belgrade. Prime Minister of Yugoslavia, Josip Broz Tito, and other officials in review stand with date “23 August”. Yugoslavian participants march in anniversary parade, some of them hold rifles. Josip Tito waves at parade.