A training film about marine mine planting, created before World War 2. Group of mine planting vessels consisting of a planter (The "General J.M. Schofield"), a DB (Distribution Box) boat and three motor boats, are seen underway in Delaware Bay. Members of 12th Coast Artillery Mine Planter Battery, on the planter vessel, attach cable to a loading wire and then connect the cable to the bale of the number 10 mine with a galvanized wire. Mine and anchor lowered over the edge of the planter. Mooring rope attaches the mine with the anchor. End of the cable attached to the DB boat. Men look over the edge of the planter as the mine is lowered into the water. Cable loosened over the stern of the planter. An animation shows the correct way of releasing of coil from a figure of eight.
Pre-World War 2 training film contains animated description about control and operation of a mine field containing deep planted mines in domestic coastal waters. It shows observing stations on the shore sighting mine positions and that information being translated to a plotting board in a control room. Illustration of vessel being targeted by a controlled mine. Views of mines being tested against obsolete warships. Illustration of submerged submarine with planted mines in the vicinity. A mine explosion. Several battleships underway.
'Aerial mine laying blockades Japanese shipping' depicts Allied preparations and Operations of the 21st Bomber Command, for aerial dropping of mines in the Pacific ocean to thwart Japanese shipping in World War 2. . Rows of stacked bombs are shown in a munitions dump at Tinian Air Base in the Mariana Islands. Camera focuses on a 2000 pound MK25 mine. Men demonstrate hydrostatic safety devices on the mine, including an extender that holds the detonator away from the booster charge until sufficiently immersed, and a clock delay mechanism. MK 25 transported to B-29 aircraft named Flak Alley Sally. (This is B-29 Number 42-24878 of the 40th Bomb Squadron, 6th Bomb Group, 313th Bomb Wing.) Airmen attach a parachute to the end of the mine. Another inserts the detonator and its extender plus the timer device into the side of the mine. Soluble washers are then placed in arming device ports. Scene shifts to Army and Navy planners working with maps, dividers, and a Weems plotter to mark the target location and mine laying pattern. 313th Bombardment Wing Group Commanders are seen being briefed in a war room. Next, engines are seen starting on a B-29, that then takes off and is seen in flight.(Narrator notes that missions are flown at night, but this one is photographed in the day to show how it is done. View of B-29 cruising above clouds. View from inside the aircraft, of bomb bay slowly opening. View of the target area below. The parachute of a mine opens by a static line as it falls from the bomb bay. Scene shifts to water level closeup of a mine striking the water. ('Presumably a demonstration inserted here.) Final scene shows a Navy Grumman TBF/TBM Avenger torpedo bomber dropping a parachute equipped mine. in the same location.
German offensive on the Eastern Front of World War II. Nazi officers look at a map and discuss plans for attack on Soviet positions. A German reconnaissance plane takes off from an air base. German Stug III Assault Gun being re-armed. Nazi soldiers loaded on Panther tanks advance, with a Sdkfz.251halftrack in Kursk markings, to the battle field. SS commander in Sdkfz.222 armored car. Pz.IV tank of 2.Pz.Div. ("Das Reich") with skirts operating in village. Heavy firing takes place. StuH42 105mm artillery mounted on tank fired. Explosions occur and smoke rises.
Coastal minesweeper operating on James River at mine warfare school, Yorktown, Virginia, during World War 2. Pennant containing three exclamation marks and three question marks (!!!???) suggests it was not yet officially commissioned.
Activity aboard United States battleship New Mexico before the invasion of Guam during World War 2. U.S. Sailors aboard the New Mexico recover fired and hot 5-inch powder cases in cans on board the ship. They place and stack cans on the deck of the ship.
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