Word: patroled
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Dates: during 1930-1939
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...from Puerto Rico, fanwise over eastern Caribbean waters, the U. S. Navy's patrol squadron 51 has kept an aerial peace watch since Sept. 9. Last week in San Juan, the squadron's Lieut.-Commander Stephen B. Cooke reported on his vigil. Nary a submarine, said he, had been sighted by his fliers; of frequent reports, not one had proved true...
Last week rain fell continuously on the Western Front. In the 20-mile sector north of the Swiss border which faces the rocky fortress of Istein-Germany's "Gibraltar of the Rhine"-sodden French infantrymen came in from patrol to report that across the swelling river the German troops were busy in the flats. To stop this activity-whatever it was-French engineers had an answer that cost no lives, no ammunition. They closed the gates that drain Rhine water into the Rhine-Rhone Canal, let the river flood the flats...
Britain. Last week in the House of Commons Air Secretary Sir Kingsley Wood laboriously reviewed the war record of the Royal Air Force to date: it flew 1,000,000 miles of reconnaissance and patrol, escorted 100 convoys, sighted submarines on 72 occasions, attacked 34 times, made 1,000-mile flights at high altitudes. In cold figures such as Sir Kingsley cited, the R. A. F. last week had about 6,000 trained pilots, about 3,000 first-line planes. But it had, as well, spirit, ingenuity, determination, and a new plan...
Finding the direction, or bearing, of a U-boat was not enough to locate it. But if each of three patrol vessels, say a mile apart, picked up submarine sounds, determined the bearing, then communicated their bearing readings to the other two by wireless telephone, three direction lines could be drawn on a chart and the point where the lines intersected was the quarry's approximate location. Another such "fix," obtained a few minutes later, would show the submarine's course and speed...
...than in the other. He rotates the bar until the sound volume is equal in both ears; then the bar is perpendicular to the direction of the sound source. In antisubmarine practice, it was soon found impracticable to rotate the detector, whether attached to the hull of the patrol ship or towed behind. So the detector was kept stationary and the effect of rotation was obtained by lengthening the path from one receiver to one ear, shortening the other, until the sound volume was equal in both ears. This was called "binaural compensation...