Testing some aspects of DW (lots of pictures)

Zerogreat · 01-17-06, 08:58 PM

Hello... once again i have for some while two computers at my disposal, so i decided to try some things in DW on my "LAN"

Mainly regarding...detection. I did it to see how things work and while i was on it i also took pictures of my testing so you can see it too!

It might not be all 100% accurate, because DW is really very complex, and thus its hard to accuratelly test al lthe ascpects, but it should give the general idea

This time it was MH60 versus Chinese Kilo Improved... the helicopter trying to find the submarine at different depths, speeds and other circumstances, using different sensors... so, lets start!!!

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First test was Kilo detectability againts radar. Kilo was visible on radar when at 14-15 meters, diving to 15-16 meters resulted in kilo being undetectable on the radar. Raising any masts while being at 15-16 meters depth had no effect on its detctability by radar. Getting very close to the kilo did not detected the masts too.
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And now kilo versus sonar

This was the lookout on the beginning

The kilo is about 3,5 miles from our helo, running at 5 knots at 15 meters depth. There are two DICASS buoys next to the helo, one DEEP and one SHALLOW. Both ACTIVE - The DEEP one was able to see the kilo pretty well, while the SHALLOW one was unable to see it at all. The layer was at a 230 meters so it seems a bit strange to me. It was surface duct.

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Then i tried passive detection, and diesel noise

Ok, on those two pictures of passive DICASS and passive dipping sonar, you can see, that you can not see the Kilo at 3,5 miles range, 5 knots at 15 meters depth. :P

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Ok, that was somewhat expected....but lets see what happens if the kilo engages one of its diesels :hmm:

Now we can see you, boy

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So what now, will engaging of the 2nd diesel have any more effect????

Wow! it definitely does! A big time!

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Now lets disengage diesels, dive the ship to 100 meters and start running at 15 knots!

This tells us a bit about difference in active return in relation to distance to the sub.

So lets go passive now...the kilo, even at 15 knots, is one sneaky bastard!

So the range at which VLAD got hot was measly 850 yards

But still at this range, buoys get no reading and no frequency alert

But the dipping sonar hears something! But well...it is a very very faint line, i would probably not notice it not knowing where the sub is

So....let it come just a bit closer!

At a distance of about 350 yards, plus about 200 yards (because my helo drifted in wind) from the buoys, i have at last got a frequency alert and my deep VLAD and only my deep VLAD showed me a nice faint line.

In the next few seconds the deep VLAD developed a second faint line, but that was the best it done, when the kilo came too close to the buoy, the contact was lost.

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And now active detection in relation to depth!

Kilo at 150 meters...

At 200 meters......

At 200 and 50 meters...............

Now at 300 meters, there appeared some strange ghost contact!

Took two pictures of it!

And at 350 meters, the kilo imploded

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Now that is all.... interesting? :hmm:

01-17-06, 08:58 PM	#1
Zerogreat Electrician's Mate Join Date: Aug 2003 Location: Czech Republic, Prague, coordinates are sumthin like 50,10 North 14,25 East, not much accurate Posts: 132 Downloads: 0 Uploads: 0	Testing some aspects of DW (lots of pictures) Hello... once again i have for some while two computers at my disposal, so i decided to try some things in DW on my "LAN" Mainly regarding...detection. I did it to see how things work and while i was on it i also took pictures of my testing so you can see it too! It might not be all 100% accurate, because DW is really very complex, and thus its hard to accuratelly test al lthe ascpects, but it should give the general idea This time it was MH60 versus Chinese Kilo Improved... the helicopter trying to find the submarine at different depths, speeds and other circumstances, using different sensors... so, lets start!!! ------------------------------------------------------------------------ First test was Kilo detectability againts radar. Kilo was visible on radar when at 14-15 meters, diving to 15-16 meters resulted in kilo being undetectable on the radar. Raising any masts while being at 15-16 meters depth had no effect on its detctability by radar. Getting very close to the kilo did not detected the masts too. ------------------------------------------------------------------------ And now kilo versus sonar This was the lookout on the beginning The kilo is about 3,5 miles from our helo, running at 5 knots at 15 meters depth. There are two DICASS buoys next to the helo, one DEEP and one SHALLOW. Both ACTIVE - The DEEP one was able to see the kilo pretty well, while the SHALLOW one was unable to see it at all. The layer was at a 230 meters so it seems a bit strange to me. It was surface duct. --------------------------------------------------------------------------- Then i tried passive detection, and diesel noise Ok, on those two pictures of passive DICASS and passive dipping sonar, you can see, that you can not see the Kilo at 3,5 miles range, 5 knots at 15 meters depth. :P ------------------------------------------------------------------------------ Ok, that was somewhat expected....but lets see what happens if the kilo engages one of its diesels :hmm: Now we can see you, boy ------------------------------------------------------------------------------ So what now, will engaging of the 2nd diesel have any more effect???? Wow! it definitely does! A big time! ----------------------------------------------------------------------------- Now lets disengage diesels, dive the ship to 100 meters and start running at 15 knots! This tells us a bit about difference in active return in relation to distance to the sub. So lets go passive now...the kilo, even at 15 knots, is one sneaky bastard! So the range at which VLAD got hot was measly 850 yards But still at this range, buoys get no reading and no frequency alert But the dipping sonar hears something! But well...it is a very very faint line, i would probably not notice it not knowing where the sub is So....let it come just a bit closer! At a distance of about 350 yards, plus about 200 yards (because my helo drifted in wind) from the buoys, i have at last got a frequency alert and my deep VLAD and only my deep VLAD showed me a nice faint line. In the next few seconds the deep VLAD developed a second faint line, but that was the best it done, when the kilo came too close to the buoy, the contact was lost. ------------------------------------------------------------------------------ And now active detection in relation to depth! Kilo at 150 meters... At 200 meters...... At 200 and 50 meters............... Now at 300 meters, there appeared some strange ghost contact! Took two pictures of it! And at 350 meters, the kilo imploded -------------------------------- Now that is all.... interesting? :hmm: