The U.S. is deploying underwater drones and upgrading Cold War-era seabed ‘hydrophones’ to listen for Chinese and other nuclear subs that are hard to detect from above.
WSJ.com: Books, Wall Street Journal: Books
Fri, 10/24/2014 - 10:14am
The U.S. is deploying underwater drones and upgrading Cold War-era seabed ‘hydrophones’ to listen for Chinese and other nuclear subs that are hard to detect from above.