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There were no allied vessels in the harbour so the indicator loops on the minefields were activated. Two hours later, at 23:32, current was detected in an indicator loop laid in a remotely controlled minefield, induced by the submarine as it passed over the cable. Activation of the loop detonated mines in the field, sinking the submarine. [10]
Some of the Boston-area forts served as POW camps during World War II, notably Fort Andrews. [36] The US Navy also participated in defending the Massachusetts Bay area with net defenses and submarine-detecting indicator loops, including stations in Nahant (Station 1D), Gloucester (Station 1E), Scituate (Station 1C), and Provincetown. [59] [60 ...
The remaining built elements of the Royal Australian Navy (RAN) Station 9, a World War II-era indicator loop and photo-electric (PE) beam monitoring complex, are located in Myrtletown Reserve, at the end of Gannon Road near Pinkenba. The concrete control and generator hut still stand at the southeast corner of the reserve, along with a number ...
[b] The Royal Navy had continued to develop indicator loops between the wars but this was a passive form of harbour defense that depended on detecting the magnetic field of submarines by the use of long lengths of cable lain on the floor of the harbour. Indicator loop technology was quickly developed further and deployed by the US Navy in 1942.
In conjunction with the loop controlled minefields in operation off Fort Bribie (of which the mine control huts at this fort were a part), this naval base involved a system of indicator loops (submerged magnetic cables that would pick up the path of a vessel passing over them on or below the surface) between Skirmish Point at Bribie and ...
Map of Narragansett Bay mine, net, boom, and magnetic detection defenses in World War II, on a plaque at Fort Wetherill. 16-inch casemated gun, similar to those at Fort Church and Fort Greene. Early in World War II numerous temporary buildings were again constructed to accommodate the rapid mobilization of men and equipment.
This was indicator loop Station 1D. [ 4 ] [ 5 ] All of these facilities were located in the area called East Point, at the extreme southeast end of the Nahant tombolo , as shown in the map at right. After 1943, these guns, together with the two 12-inch guns of Battery Gardner at Fort Ruckman , made Nahant the most heavily armed portion of ...
The Harbor Defenses of Portsmouth was a United States Army Coast Artillery Corps harbor defense command. [1] It coordinated the coast defenses of Portsmouth, New Hampshire and the nearby Portsmouth Naval Shipyard in Kittery, Maine from 1900 to 1950, both on the Piscataqua River, beginning with the Endicott program.