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Originally Posted by GOZO
Hi Lady. I think thermal layers were modelled into SHIII? After playing SC for long time I learned the use of sound "bending" in water is very useful. As af few have pointed out, going more shallow and increasing distance may fix it since your sub can be in a "shadow". I have tried this before and it does work. Hanging around at great depth all the time makes it easier for the enemy to find you by "passive" senors. Of course when the go "active" and start pinging you rely on their accuracy in aiming the ASDIC-transmitter. Keeping a small area of your sub (preferrebly the stern) against the transmitter decreases his ability to recieve an echo strong enough to detect you.
Hope it helps. /Per :P
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Sadly...after too much look into the files, i need to finish thinking thermal layers are not modelled in SH3.
That was one of the reasons i change the sonnar beams angles into my settings, this modification "simulates" a certain kind of shadow zone when you go depth, a certain kind of thermal layer effect.
The other is because real beams are not simulated in the game, the game only have 2 kind of beams, one for pasive and one for active and no more, and the beams are exagerate wide.
If you look into the long topic of 31 pages you will find this, look the graphic posted by gouldjg :
Page 9 :
http://subsim.com/phpBB/viewtopic.ph...rops&start=200
The beams was very narrow.
In the game, sensors has wide beams, in example pasive and active sensors has a contant detection angle from surface down to 90 degrees down.
Due to that they can detect you even when they are just passing over you, and they can detect you full turn maneuvers even if they are over you. I changed that.
In the game, they are able to detect you even at silent running, when they arte far.
That was not real, a sub sailing at silent running was near to undetectable.
Even in modern wars it is true for electric subs, which prove to be realy hard to detect at silent running even by more modern sensors than those of WW2.
Into that topic you can found interesting information about that :
Page 2 :
http://subsim.com/phpBB/viewtopic.ph...drops&start=25
Posted by Caspofungin from real life reports :
here's some more info re hydrophones:
"ADM 219/563, Theoretical U/Boat listening ranges. This report was published by the US Navy's 10th Fleet ASW OR Group on 20 Aug 1943. Neglecting reflection and reflection of sound, and considering attenuation only, the distances at which a U-boat could detect the hydrophone effect (HE) for the noise output from a 50-ship convoy, or detect pings from a 40-watt QC projector, are given, in yards, as:
Water noise level-----Hydrophone Effect-----Intercepting pings
High---------------------------7,000----------------------19,000
Medium---------------------21,000-----------------------25,000
Low--------------------------31,000-----------------------27,000
These figures are viewed as reasonable, as U-boat survivor reports claim ranges of 10-15 miles, and in one case 20 miles.
Using sound intensities typical for US submarines, the following distances in yards at which an escort can hear a U-boat travelling at different speeds are calculated using similar assumptions:
Water--------------------Surfaced--------------------Submerged
Noise----------------7kt---14kt---17kt---------------4kt---6kt
High-----------------50---500---600------------------50---750
Medium-----------260---1800---2100--------------260---2500
Low---------------430---2500---2900----------------430---3300
It is assumed that the listening is non-directional and that the ASW vessel is noiseless. It is further assumed that these unrealistic assumptions will probably cancel each other out in practice."
The above is from
http://www.google.com/search?q=cache...n&client=opera
which also has interesting info re number of torps needed to sink a ship, but that's a different discussion.
check the last table, the bold number -- that's surprisingly low range for a sub at (i assume) silent running. is that reflected in sh3?
also QCL, QCE, QGA are American active sonar systems.
As you can see in a noise water, it may be heavy waves or DD's high speeds, a sub in surface at 7 knots can be detected only at 50 yards, and submerged at 4 knots at 50 yards (45m)
With medium noise water submerged at 4 knots, it can be detected only at 260 yards, 234m.
I magine at silent running and 1 or 2 knots......
Due to that, and many comments i read along the time in many fonts i serach for a good silent running.
I my settings i look for a good and effective silent running, and for reduced sensor beam angles to reduce DDs/DEs effectivity, it give a certain protection when depth, not a thermal layer simulation but is better than nothing.
