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Title
San Francisco`s WW2 U.S. Navy Magnetic Silencing Range 6 #282723215
Description
As ships travel through the water,due to the earths natural magnetic poles,a unique `magnetic signature` is created by the ships. `Enemy` listening devices can then pick up and track the ships movements. This facility on San Francisco Bay,was one of the places ships were able to be `silenced`. As seen 29 August 2017.