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The first tank-to-tank engagement occurred in mid-1968 when a US reconnaissance airplane observed a PT-76 being washed by its crew in the Bến Hải River in the DMZ (17th Parallel). The Forward Air Control pilot radioed the tank's position to a nearby M48 Patton tank unit of the US 3rd Tank Battalion .
Dissolved air flotation (DAF) is a water treatment process that clarifies wastewaters (or other waters) by the removal of suspended matter such as oil or solids. The removal is achieved by dissolving air in the water or wastewater under pressure and then releasing the air at atmospheric pressure in a flotation tank basin.
A US Air Force study reports that there are few occurrences between 5,500 m (18,000 ft) and 7,500 m (24,600 ft) and 87% of incidents occurred at or above 7,500 m (24,600 ft). [ 32 ] High-altitude parachutists may reduce the risk of altitude DCS if they flush nitrogen from the body by pre-breathing pure oxygen . [ 33 ]
Polaris MRZR-D4 "Leichtes luftlandefähiges Utility Terrain Vehicle" (LL UTV) United States: Air mobile UTV Utility terrain vehicle. 65: First batch of 65 vehicles. [228] A framework agreement for a total of up to 148 vehicles. [229] Version of the Polaris MRZR-D4, known as the Leichtes luftlandefähiges Utility Terrain Vehicle in the German ...
Kabanov was the Deputy Director of the Scientific Research Institute of the Air Force at this time, and had much experience flying foreign types. [282] 16 May Two Fleet Air Arm Vought Corsair Is of 732 Naval Air Squadron, HMS Saker, out of Naval Air Station Brunswick, crash into Sebago Lake, Maine, killing Royal Navy pilots SubLt. Vaughan ...
DD Tanks were designed to operate in waves up to 1 foot (0.3 m) high; however, on D-Day, the waves were up to 6 ft (1.8 m) high. These were much worse conditions than the tanks had been tested in and hence they were swamped. Also, the tanks of 741st Tank Battalion were launched too far out: [20] about 3 mi (4.8 km) offshore. These factors also ...
The most common such system is a fuel tank containing a combustible liquid, such as gasoline, diesel fuel, aviation fuel, jet fuel, or rocket propellant. After being fully filled, and during use, there is a space above the fuel, called the ullage, that contains evaporated fuel mixed with air, which contains the oxygen necessary for combustion ...
Equivalent air depth – Method of comparing decompression requirements for air and a given nitrox mix; Equivalent narcotic depth – Method for comparing the narcotic effects of a mixed diving gas with air; History of decompression research and development – Chronological list of notable events in the history of diving decompression.