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Active Sonar sub detection... - 7/2/2016 11:11:11 PM   
Rhygin00

 

Posts: 55
Joined: 11/4/2014
Status: offline 		...does not seem to reflect the angle of the target.

See attached file. One Oscar is angled bow on, one is angled beam on. The 688(I) have active sonars on and are running towards them. Let the sim run, the detection should happen after a couple of minutes. The 688(I) detect both Oscars at the same distance.

I have noticed that as weapon hits are concerned, ships are circles with a diameter corresponding to their length. I tested this with BOL torpedo shots. Is it the same with active sonar?

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RE: Active Sonar sub detection... - 7/2/2016 11:18:34 PM   
mikmykWS

 

Posts: 11524
Joined: 3/22/2005
Status: offline 		Not sure how much it matters but will let the guys take a look

Thanks!

Mike

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RE: Active Sonar sub detection... - 7/3/2016 2:25:12 AM   
Rhygin00

 

Posts: 55
Joined: 11/4/2014
Status: offline 		Well given that the Oscar return from bow on is 40 db while it is 300 db from the side it might influence detection ranges. Some more tactical concerns for sub drivers and sub hunters, buoy droppers etc.

I actually remade this test from a guy on Youtube, FPSchazly, who did this lately with Dangerous Waters from Sonalysts as a test of the sonar model there. In Dangerous Waters detection ranges are somewhat larger, 15nm from bow, 20 from the side, although this looks like it's too much.

Fun fact: In Command even your active detection range depends on the speed ownship is going. At 5 knots the 688 detects at 10nm, at 10 knots the distance is 8 nm. And at full throttle 32 knots total cavitation you don't detect anything at all!

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RE: Active Sonar sub detection... - 7/3/2016 1:47:37 PM   
Lowlaner2012

 

Posts: 779
Joined: 11/20/2011
Status: offline 		I have been thinking about this and have a theory, I may be wrong so humor me

Maybe the reason that the 688 can detect the Oscar from head on and the side at the same range is because its active sonar system is good enough to do so, where as a poorer quality active sonar system would detect the Oscar from the side at a longer range but have a harder time detecting and identifying the head on Oscar till its closer.

Do you get what I mean?

< Message edited by highlandcharge -- 7/3/2016 1:55:38 PM >

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RE: Active Sonar sub detection... - 7/3/2016 2:15:04 PM   
mikmykWS

 

Posts: 11524
Joined: 3/22/2005
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quote:

ORIGINAL: highlandcharge

I have been thinking about this and have a theory, I may be wrong so humor me

Maybe the reason that the 688 can detect the Oscar from head on and the side at the same range is because its active sonar system is good enough to do so, where as a poorer quality active sonar system would detect the Oscar from the side at a longer range but have a harder time detecting and identifying the head on Oscar till its closer.

Do you get what I mean?


Yeah that is kind of my thought too. Its not like passive. It just gets a hit!

Anyways as I mentioned guys will take a look. Maybe we're doing it wrong.

Mike

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RE: Active Sonar sub detection... - 7/3/2016 11:30:59 PM   
Rhygin00

 

Posts: 55
Joined: 11/4/2014
Status: offline
quote:

ORIGINAL: highlandcharge

I have been thinking about this and have a theory, I may be wrong so humor me

Maybe the reason that the 688 can detect the Oscar from head on and the side at the same range is because its active sonar system is good enough to do so, where as a poorer quality active sonar system would detect the Oscar from the side at a longer range but have a harder time detecting and identifying the head on Oscar till its closer.

Do you get what I mean?


I thought so too at first but I don't think that's it. Detection range depends on how large the return echo is, and larger objects "intercept" and then reflect back more energy as far as I understand physics. It should be similar to in game radar, which does have different returns depending on the angle.

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RE: Active Sonar sub detection... - 7/3/2016 11:51:27 PM   
Lowlaner2012

 

Posts: 779
Joined: 11/20/2011
Status: offline 		Hmm interesting, I guess we wait for the devs verdict

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RE: Active Sonar sub detection... - 7/4/2016 3:27:23 AM   
mikmykWS

 

Posts: 11524
Joined: 3/22/2005
Status: offline
quote:

ORIGINAL: Rhygin00


quote:

ORIGINAL: highlandcharge

I have been thinking about this and have a theory, I may be wrong so humor me

Maybe the reason that the 688 can detect the Oscar from head on and the side at the same range is because its active sonar system is good enough to do so, where as a poorer quality active sonar system would detect the Oscar from the side at a longer range but have a harder time detecting and identifying the head on Oscar till its closer.

Do you get what I mean?


I thought so too at first but I don't think that's it. Detection range depends on how large the return echo is, and larger objects "intercept" and then reflect back more energy as far as I understand physics. It should be similar to in game radar, which does have different returns depending on the angle.



ok


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RE: Active Sonar sub detection... - 7/4/2016 3:27:42 AM   
mikmykWS

 

Posts: 11524
Joined: 3/22/2005
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quote:

ORIGINAL: highlandcharge

Hmm interesting, I guess we wait for the devs verdict


You might be waiting awhile. We've got some critical stuff going. Will make sure the devs see it though.

Mike

< Message edited by mikmyk -- 7/4/2016 3:34:36 AM >

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RE: Active Sonar sub detection... - 7/4/2016 10:05:32 AM   
Lowlaner2012

 

Posts: 779
Joined: 11/20/2011
Status: offline 		Thanks Mike..

If I get the time I may run a test tonight, just to see if there is any difference in detection ranges against targets at different angles with an older less capable active sonar system...

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