The US Government, more precisely the USN, wishes to patent "quantum entanglement" technology
for submarine positioning, navigation, ASW and mine detection. It is meant to be undetectable by enemies. See the funky video below - groovy music!
Submarines under Arctic ice apparently rely on inertial guidance to position and navigate. This is because thick ice can block the positioning signals that submarines usually rely on. Those signals may be from GPS satellites or VLF stations and other frequency range submarine radiocommunications. Ice also blocks a submarine's extended antenna or antenna buoys.
Using active sonar to avoid banging into things is too indiscrete and hurts cute dolphins and whales' hearing.
So the US Government wishes to patent quantum entanglement which is, in theory, so far, undetectable by an enemy. But Russian scientists, or spies, love a challenge.
Perhaps the US and UK have also thought of using the method for seafloor sensors in the littorals to detect wandering enemy subs?
For more details see Mary-Ann Russon'ss article in the UK’s International Business Times, March 17, 2016 http://www.ibtimes.co.uk/us-navy-patent-device-submarines-that-detects-anything-underwater-while-keeping-itself-super-1550105