Rupert said..
I didn't know the Yanks were the ONLY country in the world that used submarines or sub surface acoustic technology.....Thanks Fly, I'm glad the other 40 or so countries don't hurt whales.
Bloody Yanks.
Well Rupert, allow me to inform you.
The US use a different type of sonar know as LFA Sonar... not your old school ping/echo, this is basically a 10 second intense 360degree variable frequency sonic wall. They originally employed the SURTASS LFA which was a passive/active sonar array with ~120NM range towed behind a boat.
SURTASS had 2 problems:
1.- It had to be slow, to keep the hydrophones on a vertical plane.
2.- It had a limitation of range bcos of the amount of towing cable.
So now the navy use their existing
passive receivers part of the IUSS (Integrated Undersea Surveillance System)
LIKE WHAT MOST OTHER COUNTRIES USE and tow dozens of 3D LFA with ~6x the dB output.
Other countries have sonar similar to SURTASS, but none have LFA with such high dB output.
Now they can use more and faster ships with the active array, and use stationary receivers at much greater distance.
Ask yourself how bad things have to be for you and your whole family to kill yourselves.
LFA sonar is a direct affront to the oceans life and must be banned.
The following clip describes the old type of LFA... like Christmas cracker vs a stick of TNT.