[BUG] Foxtrot class w/Romulan cloaking device.

[DarthHammer]

I was on a mission to intercept Spetznaz heading for Iceland. One of the enemy subs in the mission, a Foxtrot class, seemed to bug out and not register as detected even thought it was.

To elaborate, the Foxtrot never appeared on my boat's sonar. I eventually found it with an active homing torpedo, and the 3d model appeared (The hide low sig 3d models setting was on) which would indicate a 90%+ signature from the torpedo. Despite this, I had no sonar signature on the Foxtrot at all, even though the torpedo (which still had its wire) was locked on and homing.

When the sub was sunk, I finally got a sonar signature, but the wreck icon still didn't appear on the plot. Quite the odd bug.

[alexolivan]

It is very very much possible, and somehow frequent on mu playing to finding me having any chance of detecting a diesel.
The key here is ambient noise, which is the very first thing I check when entering battle against subs... over 90dB = problems, over 100dB = serious problems.
They are simply too quiet on their batteries if crawling at less than 10 knots in such ambient ;-)
Geting very very close, I finally hear them... but, in a tipic stormy/raining sea at 116dB ambient noise level, unless you're within 3-4 kyds, we need them to cavitate briefly, to have a bearing for some seconds.

You'll read that on these ocassions, it is often needed to go active sonar for a while to break their nerves and make them ping too (got a bearing!)... or go flank cavitate an follow their torpedo trails, they will launch all they have (seems like imploding bubbles sound like some kind of very ugly insult in russian or something...)

What really makes me think of a possibe bug here is the lack of wreck icon... I always get wreck icon, although wreck position sometimes appears in wrong position based on last low-rel sonar contact position at the time of hit.

[The Inept European]

What do you mean by "got a sonar signature"? Do you mean there was no waterfall pattern on the screen when that target was selected, or that you had 0% SOL?

It is entirely possible for a boat that you have not detected at all on your sub's sonars to be detected, engaged and killed by your torpedo's sonars. It is also common for a target to be positively identified only after it has been killed. If you are not sure of the exact location of the target, the wreck marker (which is at the actual position not your sonar's estimated position) can be some distance away from where you were looking and sometimes off-screen. Is this situation something different from that?

[Wiz33]

Was the wire still attached? In RL, data should coming back down the wire and provide contact info. Don't know if it's implemented in game.

[The Inept European]

Early wire guided torpedoes did not have 2-way data capabilities, or if they did it was basic information like the position and speed of the torpedo and whether it was engaged or not. Only later models of wire guided torpedoes sent sensor data back to the sub.

In the game there is debate about whether torpedoes ever provide target information back to the controlling sub, either directly or by causing an active sonar reflection that the sub picks up. Personally I don't think they do, in either case.

[Wiz33]

Publicado originalmente por The Inept European:

Early wire guided torpedoes did not have 2-way data capabilities, or if they did it was basic information like the position and speed of the torpedo and whether it was engaged or not. Only later models of wire guided torpedoes sent sensor data back to the sub.

In the game there is debate about whether torpedoes ever provide target information back to the controlling sub, either directly or by causing an active sonar reflection that the sub picks up. Personally I don't think they do, in either case.

True, I was referring to the MK48 as I rarely touch the 68 campiagn ;-P

[DarthHammer]

Publicado originalmente por The Inept European:

What do you mean by "got a sonar signature"? Do you mean there was no waterfall pattern on the screen when that target was selected, or that you had 0% SOL?

Publicado originalmente por Wiz33:

Was the wire still attached? In RL, data should coming back down the wire and provide contact info. Don't know if it's implemented in game.

What I mean is that upon the Foxtrot being sunk, sonar reported gaining the contact, classifying the contact, and the contact breaking up all at once. There was no signature to select because it was already sunk.

And as I said in the OP, I still had the wire. The Mark 48 does in fact send back it's sonar data. (You can easily verify this by having a torpedo go active as it approaches a low solution target.)

The reason I think it's bug is first and foremost the lack of a wreck icon after it was sunk, but also that the game seemed to not agree with itself on whether or not I had a solution. The torpedo homing and the 3d model appearing would indicate that I did, but my ship wasn't getting any sonar data.

[The Inept European]

The torpedo homing can be totally independent of your sub having any kind of solution or even a contact. Classifying the target only after it has been destroyed is normal (particularly with a Kilo). Re the 3D view, you do have a point, I have never checked the situation whether a target becomes visible in 3D when your torp has a solution but you (your sub) does not. Could be a bug.

Solution appearing when a torp goes active near a target could be due to active reflections off the target from the torp's sonar reaching your ship. But I agree that could be information coming down the wire. I would be more convinced if you did that with the torp in passive mode and your sub a long way away or making self-noise. I've tried to do that and never seen it happen.

Not saying you don't have a bug there but I'm not convinced either.