This is images from the sh5!?
Dont looks very impressive to me...i mean this is it!? :o
Looks like a skin from the sh4...

No those are shots from SH3 (first ones) and SH4. And they are a skin.

No. SHIV had a standard thermocline signal decay. In truth, the strength of the thermocline varies from day to day and season to season based on a number of factors. In effect, going deep should, at times, render me invisible and, at other times, do absolutey nothing to mask my signature.

Thermal layers, detectable active sonar pings, and depth charge noise disruption are a definate must!

I knew that. I was talking about MY Sonar Guy who can't hear a thing.:wah:

Another point about sonar/sound conditions is that all the different hydrophone units in use had varying degrees of bearing accuracy. With the GHG units, for instance, bearing accuracy degraded greatly around the bow area. That was the big improvement of the Balkongerat over GHG: accurate bearings could be obtained in a wider arc. The current modeling of GHG in SH4, where there is just a 20-degree dead zone around the bow, just isn't all that accurate. Bearings with GHG in this area should be obtainable, just highly inaccurate.

I'm not so sure your right, at least when on the bridge.
When I have seen explosions at the local stone mine I have been able to
hear the sound in the ground produce a sound in the air before the louder
sound that just went through the air reaches me.

The sound goes through the earth faster than the speed of sound, and out
of the earth at the surface. At the same time the sound travels through the
air only. I would imagine the same thing happens with water. No?

I've been at our local copper mine, and when they're blasting at the bottom I could certainly feel the ground shake at the visitor's center on the rim, which is more than a mile away, well before I heard it through the air. I don't recall hearing anything through the ground, but it's been many years and I could have forgotten.

I could be wrong about the bridge of the submarine as well, but I don't think so. At least I'd like not to think so.:D

You could be right - more research needed.