Hydro detection, a question

[panthercules]

Originally Posted by lumat83

Hi all

I've read on www.Uboat.net :

If a submarine speed was 4 knots, the submarine's underwater sound detector average distance of detecting another object was:

- for a destroyer- 5 to 10 nautical miles,
- for a cargo ship- 3.5 to 7.5 nautical miles,
- for a convoy- up to 50 nautical miles.

It seem that thoses distance are very different in SH3 (25kms maxi I thonk but for one contact). No ?

I suppose that this might have something to do with the masking noise being made by the U-boat's motors - if you're at all-stop in SH3, then you can hear much further than the distances you mention above, but if you were trying to hear those ships over the noise of your own motors while going 4knots, then it wouldn't surprise me if the sound-spotting distances dropped down close to what you list above (I always listen at all-stop so I can't say for sure what SH3's distances would be at 4knots).