Before Wikileaks there was Cyrptome
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May be relavant to sub digs
New type of nuclear submarine screw with cowl increases thrust and cloaks audible signature. General Dynamics Electric Boat Division, April 22, 2018
41°20'37.25" N 72°04'58.05" W
May explain why exposure of legacy screws no longer secret (MyImgPost)
https://twitter.com/cryptome/status/1026063482687512576