A film depicts the causes of avalanches. Mountainous region in the United States. Snow covered mountains. Shows and explains how wind causes dangerous cornices. The blowing of heavy wind continuously in the same direction can cause avalanches. A diagram shows the procedure. The occurrence of avalanches can be predicted with the help of several devices. A man holding a tube known as snow sampler. He prepares the tube for the purpose of prediction of avalanches. Men working in the test area. A spanner wrench is placed in the snow. The tube is placed on the wrench to predict the avalanche. Men digging up trench in the snow to inspect the layers of the snow. They measure the thickness of the layers. The observations are recorded. A chart depicts the observations.
A film depicts the causes of avalanches. Mountainous region in the United States. Snow covered mountains. A chart depicts observations and a diagram. Soldiers advancing on the mountainous area with the help of skies. They carry a mortar with them to cause an artificial avalanche. They place the mortar after removing the surface snow. The mortar is adjusted and inspected. The observer watching the slope to be fired through binoculars. The mortar is loaded and fired. The shells explode and the slope snow tumbles down. A man watching through binoculars. More shells are fired and the artificial avalanche occurs. (World War II period).
A film depicts the causes of avalanches. Mountainous region in the United States. Snow covered mountains. Soldiers advancing forward after the mortar fire and inspection of the snow. A soldier caught in the avalanche. Several soldiers working to rescue the soldier. They use various rescue equipment. Soldiers lined up near the area where the soldier is predicted to be caught. They shovel the snow. The tool strikes the body of the soldier and the soldier is taken out. He is wrapped in a blanket and carried out from the area. The snow is cleared of his mouth and he is given artificial respiration. Then the soldier is placed on a sled and the skiers take him out of the area. (World War II period).
Strafing and bombing on Hopoi, New Guinea. Three planes near a coast line. The ocean and coastline below. Planes in flight. Ships at sea. Barges with Australia's 9th Division. The coastline and landscape. Smoke in the background. Ships near the coast. Views of the landscape. (World War II period).
Transport of supplies and personnel to Tsili Tsili for Salamua invasion in New Guinea during World War II. Two C-47s taxi and take off. Nose of a plane "The Golden Arrow" in the foreground. A C-47 is in flight. Men of U.S. 6th Fighter Squadron 5th Air Force disembark from a plane at Tsili Tsili. Native labors assist in unloading the supplies. The troops unload the C-47 "The Zephyr". Smoke in the background. The troops at an airfield. Planes in formation. Planes at the airfield and troops in the foreground. Smoke rises in the distance. The planes on the airstrip.
Arrival of units of 7th Australian Division at an air field in Nadzab, New Guinea. A C-47 plane lands at Nadzab airfield. Planes and units of 7th Australian Division on the airfield. The troops unload the plane. The C-47 takes off. Troops disembark from the plane and unload supplies. The plane is in flight. At the airfield the troops unload the planes. A soldier erects a direction board which reads 'Assembly Area' and another soldier holds a direction board which reads 'Transit Camp'. A C-47 takes off. Planes and soldiers at the airfield. (World War II period).
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