RFB - Avoiding detection

Diopos · 05-29-10, 11:31 AM

Pings do not mean that you are detected necessarily.
An increase in ping pulses mean trouble.
Increased ping pulses with a secondary lower volume "echo-ping" means you are "fixed".

At least that is how I see it!

.

BillBam · 05-29-10, 11:56 AM

Quote:

Originally Posted by Diopos

Pings do not mean that toy are detected necessarily.
An increase in ping pulses mean trouble.
Increased ping pulses with a secondary lower volume "echo-ping" means you are "fixed".

At least that is how I see it!

.

It is my understanding that "in-game" you hear pings they are getting a return off you, but if it is light they do not have you good lock on you.

Red Devil · 05-29-10, 05:55 PM

I too like my convoys to come to me and get into a handy position, about 20 - 30 deg off to one side, and hopefully within 2000, go down to 200 and switch off and go silent. As the lead escort is passing, normally to one side, I then order PD and later go 1/3 and begin attack. Only a couple of times have I been detected in many many convoy attacks like this.

Admiral8Q · 05-30-10, 12:25 AM

Quote:

Originally Posted by BillBam

It is my understanding that "in-game" you hear pings they are getting a return off you, but if it is light they do not have you good lock on you.

If the pings are getting more frequent after each one then, yes, they have you!

Red Devil · 05-30-10, 07:13 AM

I think that the subject of detection should be addressed in the mods. I am going to strip game down and reinstall and start again as my detection rate has gone to 100% and I never even sneezed - must be some sort of bug?

Zel · 05-30-10, 07:40 AM

As soon as you hear a ping, it means you're detected. For this to occur, you must be within his sonar cone for a specified period of time, while presenting enough surface (sim.cfg). When you hear the first ping, the convoy will start zig-zagging.

Heavy pinging means a destroyer is close to you.

If you're below the thermal layer, you're much harder to detect with sonar. Also, if you're shallow enough, they can't ping you at all (decks awash).

The early war DD's have short range on their sonar. as the war progresses, the range of their sonar is increased.

Red Devil · 05-30-10, 08:53 AM

Actually not quite right. When I was in Rabaul inlet, to take photo's of two carriers, I was getting hit, minus pings, very easily, down below 250 and on silent and no forward motion. The 'noise' from my sub was quite bad even in that silent state. I anticipated a program error and completely uninstalled SH4 after removing TMO18 but saving saves.

I reinstalled it not too long ago and ran Balao save into Rabual again, but this time without the compatibility on Vista or XP (cant recall right now) and I managed to sit on the bottom with destroyers passing nearby without detection and completed my mission getting to within 7000 yards of the carriers. I then reversed a few hundred yards on dead slow and turned boat to port then forward and hard starboard and was nearly safe when a DD pinged me and came in, so I went down to the bottom again and sat silent and he ran past, so I went back to 1/3 periscope depth and got him to 2 rear torps, then suffaced and ran like hell at flank. Shore batteries were having pot shots at me but only minor damage. I escaped .......

Zel · 05-30-10, 09:12 AM

Interesting story! Sitting on the bottom usually doesn't work for me, so i try to move away slowly.

Perhaps he detected you initially, but later lost detection?

Going deeper always helps, not just because of the layer, but also you can get under the sonar cone.

Sailor Steve · 05-30-10, 10:11 AM

Quote:

Originally Posted by Zel

As soon as you hear a ping, it means you're detected.

No. A ping only means they're using active sonar, and they're close enough for you to hear it. As someone said earlier, if the pings start increasing in frequency then they're on to you. When you hear the pings it's a good time to get end-on to them to lower your profile. Also a good time to go silent. If one is pinging another is listening.

Althar93 · 05-30-10, 12:57 PM

A lot of usefull information, did not expect that many replies, thanks a lot guys

!!

About the search pattern of escort destroyers, has anyone experienced this : after getting bored, the destroyers usually leave at top speed to rejoin their convoy, but most of the times, I see the last destroyer acting funny.

He seems to be following his friends, but at funny speeds. He accelerates for a second (litterally) and then stops and slowly drifts forward. This behaviour can be observed for hours, and quite frankly, makes it extremely easy to go back and shoot down the idle target at close range ( since the sub is already in the "deaf" area of the destroyer ).

Is he trying to listen? Or is this just a bug?

05-29-10, 11:31 AM	#1
Diopos Ace of the Deep Join Date: Jul 2008 Location: Athens, the original one. Posts: 1,226 Downloads: 9 Uploads: 0	Pings do not mean that you are detected necessarily. An increase in ping pulses mean trouble. Increased ping pulses with a secondary lower volume "echo-ping" means you are "fixed". At least that is how I see it! . __________________ - Oh God! They're all over the place! CRASH DIVE!!! - Ehm... we can't honey. We're in the car right now. - What?... er right... Doesn't matter! We'll give it a try anyway! Last edited by Diopos; 05-29-10 at 12:19 PM. Reason: corrected typo

05-29-10, 05:55 PM	#3
Red Devil The Old Man Join Date: May 2004 Location: Sutton Coldfield England Posts: 1,541 Downloads: 305 Uploads: 0	I too like my convoys to come to me and get into a handy position, about 20 - 30 deg off to one side, and hopefully within 2000, go down to 200 and switch off and go silent. As the lead escort is passing, normally to one side, I then order PD and later go 1/3 and begin attack. Only a couple of times have I been detected in many many convoy attacks like this. __________________ > > Captain!, there's a destroyer on the por........ periscope is flooded Sir! > Darkness is only the absence of Light; Ignorance is only the absence of knowledge © www.worldwartwo.uk www.captainwalker.uk

05-30-10, 07:13 AM	#5
Red Devil The Old Man Join Date: May 2004 Location: Sutton Coldfield England Posts: 1,541 Downloads: 305 Uploads: 0	I think that the subject of detection should be addressed in the mods. I am going to strip game down and reinstall and start again as my detection rate has gone to 100% and I never even sneezed - must be some sort of bug? __________________ > > Captain!, there's a destroyer on the por........ periscope is flooded Sir! > Darkness is only the absence of Light; Ignorance is only the absence of knowledge © www.worldwartwo.uk www.captainwalker.uk

05-30-10, 08:53 AM	#7
Red Devil The Old Man Join Date: May 2004 Location: Sutton Coldfield England Posts: 1,541 Downloads: 305 Uploads: 0	Actually not quite right. When I was in Rabaul inlet, to take photo's of two carriers, I was getting hit, minus pings, very easily, down below 250 and on silent and no forward motion. The 'noise' from my sub was quite bad even in that silent state. I anticipated a program error and completely uninstalled SH4 after removing TMO18 but saving saves. I reinstalled it not too long ago and ran Balao save into Rabual again, but this time without the compatibility on Vista or XP (cant recall right now) and I managed to sit on the bottom with destroyers passing nearby without detection and completed my mission getting to within 7000 yards of the carriers. I then reversed a few hundred yards on dead slow and turned boat to port then forward and hard starboard and was nearly safe when a DD pinged me and came in, so I went down to the bottom again and sat silent and he ran past, so I went back to 1/3 periscope depth and got him to 2 rear torps, then suffaced and ran like hell at flank. Shore batteries were having pot shots at me but only minor damage. I escaped ....... __________________ > > Captain!, there's a destroyer on the por........ periscope is flooded Sir! > Darkness is only the absence of Light; Ignorance is only the absence of knowledge © www.worldwartwo.uk www.captainwalker.uk

05-30-10, 07:40 AM	#6
Zel Sailor man Join Date: Jun 2009 Posts: 45 Downloads: 8 Uploads: 0	As soon as you hear a ping, it means you're detected. For this to occur, you must be within his sonar cone for a specified period of time, while presenting enough surface (sim.cfg). When you hear the first ping, the convoy will start zig-zagging. Heavy pinging means a destroyer is close to you. If you're below the thermal layer, you're much harder to detect with sonar. Also, if you're shallow enough, they can't ping you at all (decks awash). The early war DD's have short range on their sonar. as the war progresses, the range of their sonar is increased.

05-30-10, 09:12 AM	#8
Zel Sailor man Join Date: Jun 2009 Posts: 45 Downloads: 8 Uploads: 0	Interesting story! Sitting on the bottom usually doesn't work for me, so i try to move away slowly. Perhaps he detected you initially, but later lost detection? Going deeper always helps, not just because of the layer, but also you can get under the sonar cone.

05-30-10, 12:57 PM	#10
Althar93 Watch Join Date: Jun 2005 Location: United Kingdom Posts: 22 Downloads: 89 Uploads: 0	A lot of usefull information, did not expect that many replies, thanks a lot guys !! About the search pattern of escort destroyers, has anyone experienced this : after getting bored, the destroyers usually leave at top speed to rejoin their convoy, but most of the times, I see the last destroyer acting funny. He seems to be following his friends, but at funny speeds. He accelerates for a second (litterally) and then stops and slowly drifts forward. This behaviour can be observed for hours, and quite frankly, makes it extremely easy to go back and shoot down the idle target at close range ( since the sub is already in the "deaf" area of the destroyer ). Is he trying to listen? Or is this just a bug?