The dipping sonar back when I was ASW was the AQS-13. A good operator could hear everything down there. Also, there are layers of warmer/colder waters; getting into a layer was easy, if the cable was long enough. Biggest problem was the helo noise, but the Navy developed a helmet that just about got rid of that: couldn't hear anything outside that headgear.
Operator could almost hear a couple crabs "duking it out on the floor". It was pretty easy to tell a sub class from the screw noise, and that's almost impossible to get rid of for a sub. They can be quiet, but not all quiet. Our max range was 20,000 yards, 360 degrees. A ping was 189 degrees, alternating between halves. I picked up a nuke, US, at the end of an exercise, over in Hawaii, at about 20k, tracked him all the way across (40k yards); that nuke boat was clocking in at around 54 kt under water. He was gone in a fairly short time, considering.
Aside from that, the mil does NOT divulge capabilities in any way other than the obvious. For instance, our helo was claimed to have a top end of 166 kt top airspeed. In the Nam, on a rescue up north, I was in one going 210 kt, just below tip stall. That's 199 mph vs 252 mph, roughly. They also hide operations and change history.
The dipping sonar back when I was ASW was the AQS-13. A good operator could hear everything down there. Also, there are layers of warmer/colder waters; getting into a layer was easy, if the cable was long enough. Biggest problem was the helo noise, but the Navy developed a helmet that just about got rid of that: couldn't hear anything outside that headgear.
Operator could almost hear a couple crabs "duking it out on the floor". It was pretty easy to tell a sub class from the screw noise, and that's almost impossible to get rid of for a sub. They can be quiet, but not all quiet. Our max range was 20,000 yards, 360 degrees. A ping was 189 degrees, alternating between halves. I picked up a nuke, US, at the end of an exercise, over in Hawaii, at about 20k, tracked him all the way across (40k yards); that nuke boat was clocking in at around 54 kt under water. He was gone in a fairly short time, considering.
Aside from that, the mil does NOT divulge capabilities in any way other than the obvious. For instance, our helo was claimed to have a top end of 166 kt top airspeed. In the Nam, on a rescue up north, I was in one going 210 kt, just below tip stall. That's 199 mph vs 252 mph, roughly. They also hide operations and change history.
But that 'stealth sub' is a joke.
but didjya like my meme?
I did.
thank you very much, sir