Likelihood of enemy subs detecting a weapon launch

ollie1983 · 07-07-17, 07:42 PM

Does anyone know how the game models this? Will they always detect the transient or is it based on sonar values etc?

Can they detect incoming torpedos that are set to passive only?

max-peck · 07-07-17, 08:21 PM

Cannot tell you for sure one way or the other mate.

All I can give you is some sketchy "well this happened to me" stories

Whilst broadside to an enemy sub I have launched, and despite the fact that their sonar fix on me was very poor (well into the minus tens or twenties), they seemed to react straight away and counter launch and go active

However, I have launched on enemy subs when I am deep in their baffles (-50 on both their sonar figures)
In these cases I have seen them not react until my torps are within a few thousand yards

Just some anecdotal evidence

The Bandit · 07-07-17, 08:54 PM

Quote:

Originally Posted by ollie1983

Does anyone know how the game models this? Will they always detect the transient or is it based on sonar values etc?

Can they detect incoming torpedos that are set to passive only?

I think its sonar based somewhere along the lines of +5 to +10 db on top of whatever your normal signature is. Either way in a lot of cases they are bound to hear the torpedo sooner or later as well but.

Steiger · 07-07-17, 11:06 PM

Yeah I can offer nothing beyond anecdotes as well, but if you fire from long range the escorts won't get a read on you. They may fire torpedoes in the general direction of the torpedo when they hear it, but those are easy enough to avoid. Close in launches are always detected, so use caution going head to head, even with older subs.

JhonSilver · 07-12-17, 12:47 PM

Quote:

Originally Posted by ollie1983

how the game models this?

Can they detect incoming torpedos that are set to passive only?

In config.txt is the parameter NoiseFromTransient = 5
probably this noise is attained to the basic noise of the torpedo during start.

passive probably does not increase its noise when start to search above the base noise

----
bad english sorry

Aktungbby · 07-12-17, 02:38 PM

JhonSilver!

PL_Harpoon · 07-12-17, 03:24 PM

Quote:

Originally Posted by JhonSilver

In config.txt is the parameter NoiseFromTransient = 5
probably this noise is attained to the basic noise of the torpedo during start.

passive probably does not increase its noise when start to search above the base noise

----
bad english sorry

This is pretty much accurate with my tests. Also I don't think that masking launch transient by your hull is modelled.

As for active vs passive torpedo detection, the only difference is that they can detect a ping from active torpedo even if they can't hear a passive one.

07-07-17, 07:42 PM	#1
ollie1983 Sailor man Join Date: Jun 2017 Posts: 45 Downloads: 5 Uploads: 0	Likelihood of enemy subs detecting a weapon launch Does anyone know how the game models this? Will they always detect the transient or is it based on sonar values etc? Can they detect incoming torpedos that are set to passive only?

07-07-17, 08:21 PM	#2
max-peck Grey Wolf Join Date: Jun 2011 Location: UK Posts: 752 Downloads: 393 Uploads: 0	Cannot tell you for sure one way or the other mate. All I can give you is some sketchy "well this happened to me" stories Whilst broadside to an enemy sub I have launched, and despite the fact that their sonar fix on me was very poor (well into the minus tens or twenties), they seemed to react straight away and counter launch and go active However, I have launched on enemy subs when I am deep in their baffles (-50 on both their sonar figures) In these cases I have seen them not react until my torps are within a few thousand yards Just some anecdotal evidence __________________ -------------------------------------------------- Authority should derive from the consent of the governed, not from the threat of force If the only tool you have is a hammer, pretty soon everything starts to look like a nail FOTRS Ultimate http://www.subsim.com/radioroom/showthread.php?t=226270 The future of SH4 - coming to a PC near you soon

07-07-17, 11:06 PM	#4
Steiger Planesman Join Date: Apr 2005 Posts: 187 Downloads: 20 Uploads: 0	Yeah I can offer nothing beyond anecdotes as well, but if you fire from long range the escorts won't get a read on you. They may fire torpedoes in the general direction of the torpedo when they hear it, but those are easy enough to avoid. Close in launches are always detected, so use caution going head to head, even with older subs. __________________

07-12-17, 02:38 PM	#6
Aktungbby Gefallen Engel U-666 Join Date: Jul 2013 Location: On a tilted, overheated, overpopulated spinning mudball on Collision course with Andromeda Galaxy Posts: 27,870 Downloads: 22 Uploads: 0	welcome aboard! JhonSilver! __________________ "Only two things are infinite; The Universe and human squirrelyness; and I'm not too sure about the Universe"