Word: beams
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Dates: during 1940-1949
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...vessels had tightened to a line of battle. At 10:20 a number of darkened ships loomed up on their starboard bow. Simultaneously they were challenged by an enemy vessel on the port beam. Admiral Cunningham decided to sheer away from the lone vessel and engage the others. He ordered all ships 90° to starboard...
Trip 21 crossed over the radio range 800 feet above the field level at 11:44, swung left on the southeast leg for the approved instrument approach procedure. Somewhere beyond he made a procedure turn off the beam, held it briefly, swung back and headed for the field...
...eleven years of crack operation.) In that time death on airliners had taken 54 men & women. To Atlanta hurried CAB's crash experts to try to figure out what had happened. To start with, at least, they had a baffler. Trip 21 had gone down while on the beam, headed just where she should have headed. Experienced Pilot Perry apparently had started the same maneuver that brought in two other airliners safely that night under the same conditions. But somehow he had run out of altitude. Whether it was because of mechanical trouble or by his own misjudgment...
Lyman's device uses very short radio waves* which can be focused by parabolic reflectors into beams. (The shorter the waves, the better they can be focused.) Directed into space, the beam will bounce back if it hits metal. Lyman's device rapidly combs the skies with directed beams, picks up reflected signals with a coordinated parabolic receiver. Returning signals are shown by a spot of light in a cathode ray tube (heart of television receivers). The moving spot charts the course of the plane...
Beyond this miserable handling of an emergency, what stunned CAB men most was that none of the four men in the monitor stations knew what the beam was about, none had any idea of the urgency of reporting bad operation. For this, CAB, inferentially, took the blame. It had given each a book to read about radio ranges. All they had to do was initial it, to signify they understood...