That’s good news. Besides drug smuggling, it could end the use of tunnels to smuggle weapons across borders. Now that the details are public, I wouldn’t be surprised if the Israelis come up with a practical device before anyone else.
How do we know they ain’t already got one?.............B^)
Sounds like it would be useful in detecting subs. It could replace MAD which were big devices on ASW planes and put them on smaller drones to detect subs from the air.