FFG Passive Sonar

GunnersMate · 03-17-06, 01:24 AM

Is this of any use whatsoever? I know it isnt a BQQ 5D but c'mon it seems like WWII sonar!

OKO · 03-17-06, 04:48 AM

used to watch incoming torpedoes.
Quite usefull when this is a wake homer (already identified with TA or buoys)
=> You just have to stop engines, look at this sonar and wait the torp to go behind you, then, move again.

Werewolf13 · 03-17-06, 09:15 AM

For the Passive Sonar on the FFG to be effective slow the ship down to 5 knots or less or just drift. The passive sonar IRL is almost as good as the passive on our subs though I don't know if DW is accurate in this respect. And if DW models ship sounds accurately my experience in subs regarding Perry's and Spruances is that if they are going real slow they are very, very difficult to detect and if just drifting damn near impossible (that experience dates back to the early 80's though).

Passive doesn't work too well at speed be it mounted on a sub or a target - uhhhhh - I mean ship.

Dr.Sid · 03-17-06, 09:37 AM

In DW it is VERY weak. There is not much difference in sensitivity until wash-out. It can detect trawler 500 yards away, or torpedo which is way too close. But sub ? Never ..

TLAM Strike · 03-17-06, 01:05 PM

The Hull sonar (some around here forget its a hull mounted and not bow mounted set like on the Sprucan, AB and Tico) is really ment to be an Active and Mine Detection sonar. The Passive mode is just kinda a bonus.

Just imagian the Sub's Hull sonars while running a PD at 8 knots.

I guess it could be improved a little but not a whole lot, someone better tell LW he should be able to swing that in 3.02.

LuftWolf · 03-17-06, 01:14 PM

I already HAVE improved it over the stock game.

MaHuJa · 03-18-06, 02:46 PM

The hull sonars passive mode is capable of detecting a torpedo running at max speed (at least if that is high enough) and cavitating. Anything else... well, perhaps the odd supertanker already within visual range... And that is with the improved one.

(Btw, LW, check that its sensitivity is the value you improved it to - I seem to remember that for a while it was good at finding surface ships at some distance...)

It's max speed before washout takes effect is 9 knots, btw.

LuftWolf · 03-18-06, 02:57 PM

Quote:

Originally Posted by MaHuJa

The hull sonars passive mode is capable of detecting a torpedo running at max speed (at least if that is high enough) and cavitating. Anything else... well, perhaps the odd supertanker already within visual range... And that is with the improved one.

(Btw, LW, check that its sensitivity is the value you improved it to - I seem to remember that for a while it was good at finding surface ships at some distance...)

It's max speed before washout takes effect is 9 knots, btw.

The Hull sonar got hit with the same +2 point correction that all sonars had to keep it consistent with other sonars of its type.

Perhaps it should be made more sensitive even than it is now... to be honest, I'm going to do some serious research into the Hull sonar on the FFG and get back to... after all the FFG is known as being rather hard of hearing.

I'll add it back to the list of things to look at for the next version of the mod.

Fandango · 03-18-06, 05:29 PM

Quote:

Originally Posted by TLAM Strike

The Hull sonar...is really ment to be an Active and Mine Detection sonar.

That's exactly how I use it...

Wildcat · 04-18-06, 10:51 PM

There's no point in using the hull sonar for passive listening. One of the above posters got it right, the passive towed array sonar is basically just as good as the sonar on a sub. It's a very sensitive piece of equipment and it can be used to listen at Depths down to about 1300 feet or so. In some ways the FFG is better suited to having a towed array because it can change the depth of the TA very quickly without having to change its own physical depth, like a sub, which can cause hull popping and detection.

That means you can possibly detect subs below layers where they cannot hear you but you can hear them.

Kazuaki Shimazaki II · 04-19-06, 12:30 AM

Quote:

Originally Posted by LuftWolf

The Hull sonar got hit with the same +2 point correction that all sonars had to keep it consistent with other sonars of its type.

Isn't it supposed to be "-2" if you want to improve sensitivity using the Nrd Thereshold keys?

LuftWolf · 04-20-06, 11:44 AM

We had to reduce the sensititivity of ALL passive sonars by +2 going from 1.01/2.xx to 1.03/3.xx because of the huge ranges that are sometimes capable in 1.03.

Prior to that in LWAMI 2.xx, ALL sphere/hull passive sonars got a boost, including the FFG hull sonar.

03-17-06, 01:24 AM	#1
GunnersMate Lieutenant Join Date: Feb 2006 Location: USS Sea Tiger Posts: 251 Downloads: 4 Uploads: 0	FFG Passive Sonar Is this of any use whatsoever? I know it isnt a BQQ 5D but c'mon it seems like WWII sonar! __________________ \"Sir they just fired an Exocet at us!\" \"Very well, Bosn pipe Sweepers\" I\'m having trouble with the radar, sir. What\'s wrong with it? I\'ve lost the bleeps, I\'ve lost the sweeps, and I\'ve lost the creeps.

03-17-06, 09:15 AM	#3
Werewolf13 Torpedoman Join Date: Feb 2006 Location: The HEART of Fly Over Country Posts: 120 Downloads: 62 Uploads: 0	For the Passive Sonar on the FFG to be effective slow the ship down to 5 knots or less or just drift. The passive sonar IRL is almost as good as the passive on our subs though I don't know if DW is accurate in this respect. And if DW models ship sounds accurately my experience in subs regarding Perry's and Spruances is that if they are going real slow they are very, very difficult to detect and if just drifting damn near impossible (that experience dates back to the early 80's though). Passive doesn't work too well at speed be it mounted on a sub or a target - uhhhhh - I mean ship. __________________ Peace is good... Freedom is BETTER!

03-17-06, 01:05 PM	#5
TLAM Strike Navy Seal Join Date: Apr 2002 Location: Rochester, New York Posts: 8,633 Downloads: 29 Uploads: 6	The Hull sonar (some around here forget its a hull mounted and not bow mounted set like on the Sprucan, AB and Tico) is really ment to be an Active and Mine Detection sonar. The Passive mode is just kinda a bonus. Just imagian the Sub's Hull sonars while running a PD at 8 knots. I guess it could be improved a little but not a whole lot, someone better tell LW he should be able to swing that in 3.02. __________________

03-17-06, 01:14 PM	#6
LuftWolf Ocean Warrior Join Date: May 2005 Location: Free New York Posts: 3,167 Downloads: 2 Uploads: 0	I already HAVE improved it over the stock game. __________________ LW

03-18-06, 02:46 PM	#7
MaHuJa Sonar Guy Join Date: Jan 2002 Location: 59.96156N 11.02255E Posts: 385 Downloads: 3 Uploads: 0	The hull sonars passive mode is capable of detecting a torpedo running at max speed (at least if that is high enough) and cavitating. Anything else... well, perhaps the odd supertanker already within visual range... And that is with the improved one. (Btw, LW, check that its sensitivity is the value you improved it to - I seem to remember that for a while it was good at finding surface ships at some distance...) It's max speed before washout takes effect is 9 knots, btw. __________________ Teaching DW newbies how to climb the food chain.

03-17-06, 04:48 AM	#2
OKO Commander Join Date: Jan 2002 Location: Solar system, mainly on earth Posts: 476 Downloads: 62 Uploads: 0	used to watch incoming torpedoes. Quite usefull when this is a wake homer (already identified with TA or buoys) => You just have to stop engines, look at this sonar and wait the torp to go behind you, then, move again.

03-17-06, 09:37 AM	#4
Dr.Sid The Old Man Join Date: May 2005 Location: Czech Republic Posts: 1,458 Downloads: 6 Uploads: 0	In DW it is VERY weak. There is not much difference in sensitivity until wash-out. It can detect trawler 500 yards away, or torpedo which is way too close. But sub ? Never ..

04-18-06, 10:51 PM	#10
Wildcat Engineer Join Date: Jan 2002 Posts: 215 Downloads: 69 Uploads: 0	There's no point in using the hull sonar for passive listening. One of the above posters got it right, the passive towed array sonar is basically just as good as the sonar on a sub. It's a very sensitive piece of equipment and it can be used to listen at Depths down to about 1300 feet or so. In some ways the FFG is better suited to having a towed array because it can change the depth of the TA very quickly without having to change its own physical depth, like a sub, which can cause hull popping and detection. That means you can possibly detect subs below layers where they cannot hear you but you can hear them.

04-20-06, 11:44 AM	#12
LuftWolf Ocean Warrior Join Date: May 2005 Location: Free New York Posts: 3,167 Downloads: 2 Uploads: 0	We had to reduce the sensititivity of ALL passive sonars by +2 going from 1.01/2.xx to 1.03/3.xx because of the huge ranges that are sometimes capable in 1.03. Prior to that in LWAMI 2.xx, ALL sphere/hull passive sonars got a boost, including the FFG hull sonar. __________________ LW

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