Pinging from destroyers?

Washington · 02-23-08, 10:35 PM

Hey guys,

When a destroyer starts to ping the water....what is his range and what is the pinging data telling him? Does he ping only when he knows you are out there? Doesnt the ping just tell him your bearing and range, but not your depth? How do you lose the destroyer? There are so many questions and no info in the manual!!

gimpy117 · 02-24-08, 12:04 AM

he pings when he knows you might be out there... the destroyer is attempting to get a range and bearing on you. They only do this when A. They are reasonably sure there's a boat around or B. Know your there and want a better fix on your position it can also tell depth

The best way to avoid it is dive
I hit crash dive and get down as quick as possible then "Rig for silent running"
this lowers the sound of your props making it harder to detect by passive sonar (hydrophones) and a little harder for active. So far in 1942 200 feet and the first thermal layer seems to throw them off when your at silent speed...

hope that helps happy hunting.

Jaeger · 02-24-08, 08:48 AM

hi,

the asdic has a range of 1000 - 2500 meters, depending on time in war. in sh3 there is a bug in the AI; they start pinging when you are in active range, independent of your noise level. (silent running or full stop doesnt help to avoid the destroyer to start pinging.) they also start pinging when they havent any information about a subs existence in this area. the only way to avoid a DC attack is to stay out of his active range. when in range, go as deep as possible and try to slip away after an attack run. in the passive range, try to get your noise level as low as possible. stay on periscope depth to take short looks at his actions and try to max out the distance. when detected, go deep and man your hydrophones personally. when you can hear an acceleration of his engines, he will start an DC run, then its time to increase speed to flank an change the area. after his attack run, when he slows down, go back to silent running.

edit: the pinging data gives him your position (including depth). for smallest chance to get pinged, show him your smallest silhoutte (try to hold him on 180 degrees on hydrophone)

edit2: lol, i am in the sh4 forum. sorry, i dont know, if the AI bug is also in sh4...

Jaeger

-Pv- · 02-24-08, 04:27 PM

Once under pining attack the game gets a lot harder. Best not to let that happen. Experience will go a long way (just as it did in real life) toward learning how to out-smart the AI and not get into the ping evasion cycle. Once you getting pinged, the enemy is most blind while directly over-head. Use sprint and turn tactics to get into an unexpected position where it takes the DD a while to aim the sonar in your direction going quiet between sprint-turns. This is an art and not easily learned. Takes practice. In modern subs it's called the "dance of death."
-Pv-

Nisgeis · 02-26-08, 01:26 PM

I read in one review of SH4 that the reviewer heard the escorts switch from low frequency to high frequency pinging. Was he imagining it? I've never had that happen to me.

I also get a bit hazy on the whole pinging thing. As far as I know active pinging is from supersonic projectors, but is it actually audible in the submarine, or can only the sonar operator manning the supersonic receiver hear it? It's so common in films for the whole crew to be able to hear it, but you never know if that just for dramatic effect (or perhaps played through the sonar set speaker).

-Pv- · 02-26-08, 07:02 PM

It's the ping rate and volume I hear change when they've got you bracketed with the pings getting closer together and louder as they get closer in the game. I believe WWII active sonar was clearly audible. It takes a LOT of energy (lower frequencies) to travel distances and return with enough energy to get clear detection. Especially back then. We can hear wales and dolphins when they echo range and the environmentalists sure are concerned our pings are killing wales. It's doesn't take frequencies we can't hear to be "supersonic" in water since transmission is faster than in air.
-Pv-

02-23-08, 10:35 PM	#1
Washington Watch Join Date: Feb 2008 Posts: 20 Downloads: 9 Uploads: 0	Pinging from destroyers? Hey guys, When a destroyer starts to ping the water....what is his range and what is the pinging data telling him? Does he ping only when he knows you are out there? Doesnt the ping just tell him your bearing and range, but not your depth? How do you lose the destroyer? There are so many questions and no info in the manual!!

02-24-08, 12:04 AM	#2
gimpy117 Ocean Warrior Join Date: Jul 2007 Location: Kalamazoo, MI Posts: 3,243 Downloads: 108 Uploads: 0	he pings when he knows you might be out there... the destroyer is attempting to get a range and bearing on you. They only do this when A. They are reasonably sure there's a boat around or B. Know your there and want a better fix on your position it can also tell depth The best way to avoid it is dive I hit crash dive and get down as quick as possible then "Rig for silent running" this lowers the sound of your props making it harder to detect by passive sonar (hydrophones) and a little harder for active. So far in 1942 200 feet and the first thermal layer seems to throw them off when your at silent speed... hope that helps happy hunting. __________________ Member of the Subsim Zombie Army

02-24-08, 08:48 AM	#3
Jaeger Chief Join Date: Jul 2005 Posts: 316 Downloads: 28 Uploads: 0	hi, the asdic has a range of 1000 - 2500 meters, depending on time in war. in sh3 there is a bug in the AI; they start pinging when you are in active range, independent of your noise level. (silent running or full stop doesnt help to avoid the destroyer to start pinging.) they also start pinging when they havent any information about a subs existence in this area. the only way to avoid a DC attack is to stay out of his active range. when in range, go as deep as possible and try to slip away after an attack run. in the passive range, try to get your noise level as low as possible. stay on periscope depth to take short looks at his actions and try to max out the distance. when detected, go deep and man your hydrophones personally. when you can hear an acceleration of his engines, he will start an DC run, then its time to increase speed to flank an change the area. after his attack run, when he slows down, go back to silent running. edit: the pinging data gives him your position (including depth). for smallest chance to get pinged, show him your smallest silhoutte (try to hold him on 180 degrees on hydrophone) edit2: lol, i am in the sh4 forum. sorry, i dont know, if the AI bug is also in sh4... Jaeger

02-24-08, 04:27 PM	#4
-Pv- The Old Man Join Date: Apr 2006 Posts: 1,434 Downloads: 5 Uploads: 0	Once under pining attack the game gets a lot harder. Best not to let that happen. Experience will go a long way (just as it did in real life) toward learning how to out-smart the AI and not get into the ping evasion cycle. Once you getting pinged, the enemy is most blind while directly over-head. Use sprint and turn tactics to get into an unexpected position where it takes the DD a while to aim the sonar in your direction going quiet between sprint-turns. This is an art and not easily learned. Takes practice. In modern subs it's called the "dance of death." -Pv-

02-26-08, 01:26 PM	#5
Nisgeis Ocean Warrior Join Date: Jan 2008 Posts: 2,909 Downloads: 77 Uploads: 11	I read in one review of SH4 that the reviewer heard the escorts switch from low frequency to high frequency pinging. Was he imagining it? I've never had that happen to me. I also get a bit hazy on the whole pinging thing. As far as I know active pinging is from supersonic projectors, but is it actually audible in the submarine, or can only the sonar operator manning the supersonic receiver hear it? It's so common in films for the whole crew to be able to hear it, but you never know if that just for dramatic effect (or perhaps played through the sonar set speaker).

02-26-08, 07:02 PM	#6
-Pv- The Old Man Join Date: Apr 2006 Posts: 1,434 Downloads: 5 Uploads: 0	It's the ping rate and volume I hear change when they've got you bracketed with the pings getting closer together and louder as they get closer in the game. I believe WWII active sonar was clearly audible. It takes a LOT of energy (lower frequencies) to travel distances and return with enough energy to get clear detection. Especially back then. We can hear wales and dolphins when they echo range and the environmentalists sure are concerned our pings are killing wales. It's doesn't take frequencies we can't hear to be "supersonic" in water since transmission is faster than in air. -Pv-