Word: sonar
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...circumstantial support. For one thing, there had been earlier Norwegian reports of six red rockets being launched from the fjord; defense spokesmen said that such pyrotechnics are a normal method of communication between submarines wishing to avoid radio contact. For another, Norwegian officials disclosed that patrols had made strong sonar contacts with at least one submarine trying to leave the fjord on the night that Radio Tirana asserts both subs did depart...
Moscow shed no light on the puzzle. Before the Albanian explanation but after Norwegian vessels had dropped depth charges in response to positive sonar soundings, Tass called the air-sea hunt "just an expression of the usual war hysteria in the West." Perhaps significantly, though, at no time did the Kremlin specifically deny that a Soviet sub-or subs-might have been inside Norwegian waters. At week's end, the mystery remained at least as deep as Sogne Fjord's 600 fathoms...
Besides ARPA. BBN is also involved in acoustics research for the Navy, a North Cambridge Vietnam Committee spokesman said yesterday. The company helped develop the MK-48 torpedo, whose automatic sonar system was later used in the mines dropped into North Vietnamese harbors last spring, he added...
Common Trick. In the wee hours of the morning of Aug. 8, the sonar suddenly indicated that something was lurking near by in some 45 ft. of water. After a time, whatever was there disappeared, only to reappear a few minutes later and then vanish again. Rines had his men play a strong spotlight on the waters, a common trick used to attract fish. To Rines' delight, the light apparently had an effect on whatever was in the loch; the sonar resumed its odd tracings. The evidence, which was examined by experts in sonar at M.I.T., Raytheon...
Still, a question remains: If they were not echoes from a living thing, what did cause the strange traces on Rines' sonar...