Word: signalizes
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Dates: during 1930-1939
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...Martians were planning to send the Earth a signal, this week would be the time. If they send a light signal, the beacon will have to be of at least one and one-half trillion candlepower to be visible in Mt. Wilson's 100-inch telescope. No plans were afoot on Earth to communicate with Mars...
...part of the fleet of vessels, mostly run by Rumanians and Greeks, that hovers continuously off the Palestine coast. Crowded miserably aboard them are hundreds of Jewish refugees from Poland, Germany, Rumania, Hungary and former Czecho-Slovakia. At night the vessels edge closer to the shore, watching for the signal lights that mean all is clear for the landing of their cargoes. Since April 1938 more than 15,000 Jewish refugees are estimated to have illegally entered Palestine in this...
...seconds after the first diving signal was given, officers at key posts throughout the boat reported all rigged for diving. The Squalus was 50 feet under the surface before "a hazy voice" from the engine room telephoned: "Take her up. The induction [main air valve] is open," and seconds later: "The engine room is flooded...
...went down, the guilty valve failed to open properly but had never failed to close. It was disassembled, supposedly put in perfect order. On the Squalus and her sister boats, this valve is outside the hull, near the conning tower and invisible to those inside, who must depend on signal lights to know whether it is open or closed. The electrical signal system could have lied "if the mechanism was out of order...
Sabotage on the Squalus was ruled out by the weight of testimony against the air valve and signal mechanisms. The Squalus board, of course, had no word to say about the British Thetis and French Phenix, whose loss naval officers attribute to the accepted fact that submarines are innately dangerous craft, which by the laws of probability should sink more often than they...