Word: signaled
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Dates: during 1960-1969
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...Careful gave Carrot a battery-powered bug in a walnut-covered container to match the bookcase. It was 13 in. long, 1½ in. wide and ½ in. deep and contained a microphone and a transmitter that could be activated by an outside high-frequency signal to broadcast conversations from deep inside State Department offices. No sooner was the meeting over than Mrkva gingerly handed the bug to waiting FBI agents...
...past month ground fire has claimed an average of one U.S. plane a day over North Viet Nam. Last week five U.S. planes were downed. One of them was an Air Force Phantom. Set afire by flak, the Phantom's two-man crew sent out a distress signal, then radioed that they were going to try to reach the Gulf of Tonkin...
Aware that the intense lunar cold might well have changed the operating frequency of Surveyor's receiver, the JPL men tried varying the tuning of their own equipment. Still they got no answer. Then, last week, a signal from an 85-ft. parabolic antenna in Australia's Tidbinbilla Valley finally got through-near the spaceship's original frequency. Surveyor's transmitter obeyed the order, turned on, and reported in response to queries that all electrical and mechanical systems were functioning once more. Surveyor was again a fully operational spacecraft...
After detecting a radar aiming-signal pulsing from a Russian-installed surface-to-air rocket site 30 miles north of the city (one missile was believed fired but never visually spotted), four Thunderchiefs went after the nest, which was demolished by one of them. Whereupon four MIG-17s jumped the F-105s damaging two. Outmaneuvering one MIG, Major Fred L. Tracy, 38, of Goldsboro, N.C., got on his adversary's tail, opened up with 20-mm. cannon and was credited with a probable kill. The remaining MIGs fled...
...achieve lunar color photography, Jet Propulsion Laboratory scientists in Pasadena first commanded the mirror mounted above Surveyor's fixed, black-and-white television camera to swivel and tilt until it reflected the proper piece of lunar terrain into the cam era lens. By radioed signal, they start ed a filter wheel turning until a red filter was in front of the lens. Then they ordered the camera to photograph the scene. The procedure was repeated twice more, once with a green and finally with a blue filter...