Deep diving bathyscaphe (deep Boat) Trieste moves underwater in Marina Trench, Pacific Ocean. Millions of tiny air bubbles, mud moves underwater. View of Small sea life, sand, small rocks and pebbles as Trieste moves under water. An Eel fish moves in front of Trieste.
United States Navy bathyscaphe "Trieste", which is a sumbersible deep diving research boat, seen underway in the Pacific Ocean off the coast of Guam. It reaches a record breaking depth of about 37,000 feet in the Mariana Trench, which is the deepest location on the surface of the Earth's crust.
Amphibious attack by the U.S. forces on an island in the Pacific during World War II. A U.S. battleship underway in the Pacific Ocean. The naval guns of the battleship are fired. Landing crafts loaded with soldiers approach the island. Aircraft in flight drop bombs. U.S. troops wade inland. Dead bodies lying on the ground. Vehicles driven inland. A soldier fires a gun. Soldiers filing out of grass. They carry ammunition. The soldiers sit in a trench. Injured soldiers are treated. They are carried on litters. A jeep is driven away. Tanks move in a line. Soldiers on a battlefield.
The Battle of Saipan during World War II. An aircraft in flight over Saipan, Mariana Islands . An aircraft carrier underway in the Pacific Ocean. U.S. aircraft on the deck. A signal officer gives a signal. The aircraft taxi and take off one after the other. The aircraft in flight. Japanese bombers drop bombs and attack a task force. The bombers drop bombs over U.S. ships. Smoke rises due to bombardment. A smoke screen is formed. The aircraft carrier underway. A bomber aircraft drops bombs. The deck of the carrier. A U.S. aircraft crashes while landing on the deck. Crew members run and approach the aircraft.
A U.S. Navy Task Force underway in the Pacific Ocean off the shore of Saipan, Mariana Islands during the Battle of Saipan of World War II. A BB (Battleship) underway. A 40mm gun mount in the foreground. Shell splashes as 40mm guns are fired. Smoke rises in the background. Landing Crafts underway and guns are fired.
'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.