static subs still emits noise?

TLAM Strike · 01-06-12, 12:37 AM

Your generators are still running because your sonar, air conditioning, light etc needs to keep running. Even at all stop a diesel boat makes some noise. If you shut down every piece of electrical equipment you could in theory evade sonar detection but you can't do that in DW.

That is the IRL explnation, but as Schwartzritter said it most likely had you on HF sonar.

magicstix · 01-06-12, 01:51 AM

He heard your crew singing. Next time let them know about proper quiet ship procedures.

I don't think DW models Akulas going HF, it certainly doesn't make sense from a doctrine standpoint.

Hinrich Schwab · 01-06-12, 02:52 AM

The HF is not reliable for much more than finding mines, but the engine does allow for HF detection by platforms with such arrays. I just created a quick mission in in the game to test the theory using an Akula II and the N. Korean Midget Sub. While the blip did not really show in the HF monitor at all, I pointed the boat and the scope in the general area and the engine placed an HF mark in the vicinity of the target, so it is conceivable that if someone is close enough, the HF can mark the player and trigger AI doctrine. I think OP's issue is a very rare case, however.

Molon Labe · 01-07-12, 03:01 PM

At 130 meters, HFS is very likely the source, but I wouldn't rule out a passive detection at base (contact speed = 0) passive level either.

Vipper · 01-07-12, 10:55 PM

Quote:

Originally Posted by magicstix

He heard your crew singing. Next time let them know about proper quiet ship procedures.

I don't think DW models Akulas going HF, it certainly doesn't make sense from a doctrine standpoint.

Maybe he heard how i clicked switches

He was few km away from me, no more and my silent ambush failed...

Oh, are tubes flooding noise modeled in game? I did that.

Dr.Sid · 01-08-12, 10:52 AM

IIRC subs do emit noise when static. There were some graphs with noise vs. speed, and all subs, including Kilo, did emit some noise at speed zero. The noise was very small. The noise also did not increase until 5kts or so. Simply speaking static sub makes same noise as slow sub.
No transients like opening tubes are generated by AI subs, nor detected by any sub, AFAIK.

IMHO at 130m you simply detected you. Depends on the background noise. I literally crashed into Kilo once without detecting him, but it was stormy sea.
At 130m he could actually create a shadow on BB by masking background noise. Not that it is simulated in DW.

magicstix · 01-14-12, 02:22 PM

Quote:

Originally Posted by Dr.Sid

At 130m he could actually create a shadow on BB by masking background noise.

Your source on this?

Dr.Sid · 01-14-12, 05:20 PM

Quote:

Originally Posted by magicstix

I'd say tubes flooding would definitely be a detectable transient; I dunno if DW models that though.

It does not. At least if AI is involved on either side. Not sure about player vs. player, as many things are different with player boats.

Quote:

Originally Posted by magicstix

Your source on this?

Just a rumors I'm afraid. But imho it's plausible. Questions is at what range such effect would occur.

magicstix · 01-14-12, 05:50 PM

Quote:

Originally Posted by Dr.Sid

Just a rumors I'm afraid. But imho it's plausible. Questions is at what range such effect would occur.

I wouldn't expect it to occur due to diffraction except at collision ranges.

magicstix · 01-14-12, 02:21 PM

Quote:

Originally Posted by Vipper

Maybe he heard how i clicked switches

He was few km away from me, no more and my silent ambush failed...

Oh, are tubes flooding noise modeled in game? I did that.

I'd say tubes flooding would definitely be a detectable transient; I dunno if DW models that though.

01-06-12, 12:37 AM	#1
TLAM Strike Navy Seal Join Date: Apr 2002 Location: Rochester, New York Posts: 8,633 Downloads: 29 Uploads: 6	Your generators are still running because your sonar, air conditioning, light etc needs to keep running. Even at all stop a diesel boat makes some noise. If you shut down every piece of electrical equipment you could in theory evade sonar detection but you can't do that in DW. That is the IRL explnation, but as Schwartzritter said it most likely had you on HF sonar. __________________

01-07-12, 03:01 PM	#4
Molon Labe Silent Hunter Join Date: Jun 2004 Location: Along the Watchtower Posts: 3,810 Downloads: 27 Uploads: 5	At 130 meters, HFS is very likely the source, but I wouldn't rule out a passive detection at base (contact speed = 0) passive level either. __________________

01-08-12, 10:52 AM	#6
Dr.Sid The Old Man Join Date: May 2005 Location: Czech Republic Posts: 1,458 Downloads: 6 Uploads: 0	IIRC subs do emit noise when static. There were some graphs with noise vs. speed, and all subs, including Kilo, did emit some noise at speed zero. The noise was very small. The noise also did not increase until 5kts or so. Simply speaking static sub makes same noise as slow sub. No transients like opening tubes are generated by AI subs, nor detected by any sub, AFAIK. IMHO at 130m you simply detected you. Depends on the background noise. I literally crashed into Kilo once without detecting him, but it was stormy sea. At 130m he could actually create a shadow on BB by masking background noise. Not that it is simulated in DW. __________________ ComSubSim forum at CADC

01-06-12, 01:51 AM	#2
magicstix Captain Join Date: Aug 2011 Location: Nuclear submarine under the North Pole Posts: 482 Downloads: 1 Uploads: 0	He heard your crew singing. Next time let them know about proper quiet ship procedures. I don't think DW models Akulas going HF, it certainly doesn't make sense from a doctrine standpoint.

01-06-12, 02:52 AM	#3
Hinrich Schwab Grey Wolf Join Date: Nov 2010 Posts: 908 Downloads: 89 Uploads: 0	The HF is not reliable for much more than finding mines, but the engine does allow for HF detection by platforms with such arrays. I just created a quick mission in in the game to test the theory using an Akula II and the N. Korean Midget Sub. While the blip did not really show in the HF monitor at all, I pointed the boat and the scope in the general area and the engine placed an HF mark in the vicinity of the target, so it is conceivable that if someone is close enough, the HF can mark the player and trigger AI doctrine. I think OP's issue is a very rare case, however.