A training film about the means of forecasting avalanches in Alta, Utah. A snow ranger skies down a slope during testing. Incorrect and correct or safer ways of test skiing demonstrated. Explosives being used to set an avalanche in motion. Cables attached and a charge package of TNT (Trinitrotoluene) prepared. Fuse lit up with an igniter. A man throws the charge and explosion results in a crater indicating the least possibility of occurrence of an avalanche. Another man throws a charge and results in slab avalanche as snow breaks up in blocks. An electric cap being used to control time of detonation of explosive. A man throws the charge and a slab avalanche occurs as a result of a slide set on motion by the explosion. A man works on a projectile called avalauncher. Men work on the projectile and fire it at a slope.
A training film about the means of forecasting and controlling avalanches in Alta, Utah. A 81 mm mortar being used to set off an avalanche. Men work on the mortar. A 75 mm Mountain Howitzer being worked on for setting off an avalanche. Men load a shell into the Howitzer and fire. A slab avalanche is set off as snow drifts down a slope. A dust cloud is formed.
A training film about the means of forecasting and controlling avalanches in Alta, Utah. A 75 mm Mountain Howitzer fired from a highway. It does not result in an avalanche. A 105 mm Recoilless Rifle being fired at a slope, which does not result in an avalanche. Backlash of the rifle results in two avalanches down a slope.
A training film about the means of forecasting and controlling of avalanches in Alta, Utah. A 105 mm Recoilless Rifle fired from a tower. A 75 mm Recoilless Rifle fired from a temporary tower. The Shell impacts and snow drifts down a slope at a great speed.
A training film about the means of forecasting and controlling of avalanches in Alta, Utah. A fix mount Recoilless Rifle being fired at the snow covered slopes and no avalanche occurs. The Recoilless Rifle fired to check for occurrence of avalanches in ski areas. An avalanche launched at a little distance. A 105 mm Recoilless Rifle mounted on a vehicle. A man dislodges the corners with heels of the skis. Snow drifts down as the corners are dislodged.
A training film about the means of forecasting and controlling avalanches in Alta, Utah. A snow covered corner overhanging a ski run in Alta, Utah. A man walks along an area and drills holes in the snow. Another man prepares a charge package and put sticks in each of the holes. Charges placed along the corners detonate and an avalanche occurs. The corner being dislodged as snow slopes down. Skiers watch the avalanche. Various means of checking for avalanches include skiing in case of shallow snow condition. A man throws an explosive to detonate the area and set an avalanche in motion. A projectile fired along the slope to check for avalanche occurrence. The precautions to be taken while setting off an avalanche include checking the slops below for any skiers or vehicles. A man on a cliff looks down at the slope and signals with his hands. Explosion occurs and an avalanche is set in motion. A shell hits a slope and dislodges a major avalanche as it drifts down the slope.
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