Scientists Explore Underwater Quantum Links for Submarines
New tests show that such links can be reliably established in turbulent waters at greater distances than previously reported
This seems to be a woeful waste of research $$ and a woeful ignorance of how subs have communicated with their command stations & sometimes each other (although not lightly!) for Decades.
Do you think any sub is not in constant contact with upper command now? So that they can launch their nuclear missles immediately upon command?
I could tell you how they do it, but I signed an oath against disclosing classified info. However, I am sure the info is readily available on Google......