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- Q11613984 subject Q5878413.
- Q11613984 subject Q6177481.
- Q11613984 subject Q6983088.
- Q11613984 subject Q8669756.
- Q11613984 abstract "Deperming, or degaussing, is a procedure for erasing the permanent magnetism from ships and submarines to camouflage them against magnetic detection vessels and enemy marine mines.A sea-going metal-hulled ship or submarine, by its very nature, develops a magnetic signature as it travels, due to a magneto-mechanical interaction with Earth's magnetic field. It also picks up the magnetic orientation of the earth's magnetic field where it is built. This signature can be exploited by magnetic mines or facilitate the detection of a submarine by ships or aircraft with magnetic anomaly detection (MAD) equipment. Navies use the deperming procedure, in conjunction with degaussing, as a countermeasure against this. Specialized deperming facilities, such as the United States Navy's Lambert's Point Deperming Station at Naval Base Kitsap, or Pacific Fleet Submarine Drive-In Magnetic Silencing Facility (MSF) at Joint Base Pearl Harbor-Hickam, are used to perform the procedure. During a closed-wrap magnetic treatment, heavy-gauge copper cables encircle the hull and superstructure of the vessel, and high electrical currents (up to 4000 amperes) are pulsed through the cables. This has the effect of "resetting" the ship's magnetic signature to the ambient level after flashing its hull with electricity. It is also possible to assign a specific signature that is best suited to the particular area of the world in which the ship will operate. In drive-in magnetic silencing facilities, all cables are either hung above, below and on the sides, or concealed within the structural elements of facilities. Deperming is "permanent". It is only done once unless major repairs or structural modifications are done to the ship.During World War II, the United States Navy commissioned a specialized class of degaussing ships that were capable of performing this function. One of them, USS Deperm (ADG-10), was named after the procedure.".
- Q11613984 thumbnail US_Navy_051115-N-2984R-123_The_Nimitz-class_aircraft_carrier_USS_Harry_S._Truman_(CVN_75)_undergoes_a_deperming_evolution_at_the_Lamberts_Point_Deperming_Station_in_Norfolk,_Va.jpg?width=300.
- Q11613984 wikiPageWikiLink Q11220.
- Q11613984 wikiPageWikiLink Q1345036.
- Q11613984 wikiPageWikiLink Q1509410.
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- Q11613984 wikiPageWikiLink Q4508.
- Q11613984 wikiPageWikiLink Q5669602.
- Q11613984 wikiPageWikiLink Q5878413.
- Q11613984 wikiPageWikiLink Q6177481.
- Q11613984 wikiPageWikiLink Q6481208.
- Q11613984 wikiPageWikiLink Q677.
- Q11613984 wikiPageWikiLink Q6983088.
- Q11613984 wikiPageWikiLink Q753.
- Q11613984 wikiPageWikiLink Q7868837.
- Q11613984 wikiPageWikiLink Q8669756.
- Q11613984 comment "Deperming, or degaussing, is a procedure for erasing the permanent magnetism from ships and submarines to camouflage them against magnetic detection vessels and enemy marine mines.A sea-going metal-hulled ship or submarine, by its very nature, develops a magnetic signature as it travels, due to a magneto-mechanical interaction with Earth's magnetic field. It also picks up the magnetic orientation of the earth's magnetic field where it is built.".
- Q11613984 label "Deperming".
- Q11613984 depiction US_Navy_051115-N-2984R-123_The_Nimitz-class_aircraft_carrier_USS_Harry_S._Truman_(CVN_75)_undergoes_a_deperming_evolution_at_the_Lamberts_Point_Deperming_Station_in_Norfolk,_Va.jpg.