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Bilge_Rat · 04-10-07, 01:53 PM

This is how sonar works in real life:

http://www.fas.org/man/dod-101/navy/...P/snr_prop.htm

none of this is modeled in SH4 except the thermal layer. Normally, it should be harder to hear close to the surface due to temperature changes (figs.6,7 & 8), reflection of sound on the surface and the turbulence caused by the boat.

In Dangerous Waters where the Sonar is based on this model, you will normally pick up stronger sound signals as you go deeper.

In SH4, it looks like the sound model is very simple, namely contacts appear as soon as they are at a certain range with an adjustment based on whether the sub is above or below the thermal layer.

Normally you should still be able to pick up contacts at PD although not as well as if you go deeper, since the SH4 sound model appears to be a simple on/off thing, I presume it was a design decision to remove the ability to hear sound contacts at PD.

04-10-07, 01:53 PM	#10
Bilge_Rat Silent Hunter Join Date: Apr 2002 Location: standing watch... Posts: 3,855 Downloads: 344 Uploads: 0	This is how sonar works in real life: http://www.fas.org/man/dod-101/navy/...P/snr_prop.htm none of this is modeled in SH4 except the thermal layer. Normally, it should be harder to hear close to the surface due to temperature changes (figs.6,7 & 8), reflection of sound on the surface and the turbulence caused by the boat. In Dangerous Waters where the Sonar is based on this model, you will normally pick up stronger sound signals as you go deeper. In SH4, it looks like the sound model is very simple, namely contacts appear as soon as they are at a certain range with an adjustment based on whether the sub is above or below the thermal layer. Normally you should still be able to pick up contacts at PD although not as well as if you go deeper, since the SH4 sound model appears to be a simple on/off thing, I presume it was a design decision to remove the ability to hear sound contacts at PD.