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Originally Posted by SeaQueen
Same here. The whole effect he described struck as something that MIGHT be necessary to account for if you got really close, but not likely. I imagine that if it was real, it'd be less likely to be seen near the surface, than if you got really close to a bottom type that wasn't very lossy and then made a really loud noise. It strikes me as the sort of thing that follows from the fact that if you get up really close to a reflective surface, certain nearly vertical angles would be reflected almost straight back down. It doesn't seem impossible to me, at least by intuition.
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Well, whether and how strong this effect occures depends(i guess) on the size of the submarine, noise it emmits and the proximaty to the reflective surface.
The formula consists of variables and i need to know whitch math operations i should apply to them.
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As far as volume scattering goes, I thought in passive sonar that was taken into account in the transmission loss term.
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Sure it is.
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Regardless, I don't think it should be in the game anyhow. If you're that close to the bottom, you're aground and if you're that close to the surface, you're broached.
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Again i think it depends on the values of the variables. This effect should be especialy stronger in very shallow water, when the resonance comes from the surface and bottom at once adding an additional interferance source to the already difficult hydroacoustical situation.
I remember the NWS guys talking about this effect on the NWS yahoo group. So it curtainly matters. And it was modeled in Sub Command anyway. This is especialy a concern at PD
Deamon