SUBSIM Radio Room Forums - View Single Post - Destroyers Discussion (getting rid of pin point drops)

Ducimus · 11-30-05, 03:34 AM

Posting this now while its still fresh in my mind:

Using this mission:
http://rapidshare.de/files/8027236/s...-test.rar.html

I edited the starting point back so theres like 11K meters distance between the DD and the player sub to give me time to dive.

Parameters of my testing so far:

Sim.cfg:
Hydrophone]
Detection time=0.0 ;[s]
Sensitivity=0.03 ;(0..1)
Height factor=0 ;[m]
Waves factor=0.0 ;[>=0]
Speed factor=15 ;[kt]
Noise factor=0.0 ;[>=0]

AI_sensors.dat:
I took all default passive sonar values and multiplied it by 3. Ballpark figure, puts most of them in the 20 to 30K range.
AI_Hydrophones set to 30K, later reduced to default value of 6K.

Observations:
Test 1: Escort was at crew rating 4.
Instant i hit 10 meters i was detected at ahead slow, doing about 4 knot.
DD detected me before the sonar operator acknowledged he was there (about 2 seconds later). About 5 seconds later i got him targeted in periscope at about 9800 meters.

THATS FAR.

Test 2: I dumbed down the escort to crew rating 1.
Results were the same as test 1.

After this i re-edited the AI_sensor.dat and changed the AI hydrophone from 30K back to its default value of 6K

Ran test 3: escort of crew rating 1 (unchanged from previous test)
Same results, detected almost immediatly, under same conditions, only difference is the AI_hydrophone was set to 6K while all specific passives were tripled in value.

Next, going to change sim.cfg hydrophones back to default values and run another 2 tests. If results are the same then going to lower hydrophone max range from Default *3, to default *2.

More later.

EDIT:
More testing:
Parameters used:

Sim.cfg:
-vanilla default

AI_sensors.dat
- AI_hydrophones = default of 6K
- All passives = default *3

Test 4: DD crew rating =4
Was not detected on dive, ran at ahead slow at 50 meters. Recieved no detection notice, DD just starting pinging when within active sonar range without any warning.

Test 5: DD crew rating =1
Similar results, not detected on dive, ran ahead at 50 meters at ahead slow. However this time i did recieve a detection notice, im guessing at about 1500-2K meters, Just before he starting pinging.

In neither test did i try silent running, i just ran at ahead slow at 50 meters running head on into the DD to see if/when hed detect me.

Clearly the settings in the sim.cfg play a MAJOR role. My thought now is to tone down the passive sonars to default, or default*2 and fine tune the CFG.

I should also note that all tests were with the above linked mission, calm seas, and clear weather, seems like ideal sonar conditions.

I think ill run another test before chaning anything at ahead 1/3rd and see when im detected.

11-30-05, 03:34 AM	#283
Ducimus Rear Admiral Join Date: May 2005 Posts: 12,987 Downloads: 67 Uploads: 2	Posting this now while its still fresh in my mind: Using this mission: http://rapidshare.de/files/8027236/s...-test.rar.html I edited the starting point back so theres like 11K meters distance between the DD and the player sub to give me time to dive. Parameters of my testing so far: Sim.cfg: Hydrophone] Detection time=0.0 ;[s] Sensitivity=0.03 ;(0..1) Height factor=0 ;[m] Waves factor=0.0 ;[>=0] Speed factor=15 ;[kt] Noise factor=0.0 ;[>=0] AI_sensors.dat: I took all default passive sonar values and multiplied it by 3. Ballpark figure, puts most of them in the 20 to 30K range. AI_Hydrophones set to 30K, later reduced to default value of 6K. Observations: Test 1: Escort was at crew rating 4. Instant i hit 10 meters i was detected at ahead slow, doing about 4 knot. DD detected me before the sonar operator acknowledged he was there (about 2 seconds later). About 5 seconds later i got him targeted in periscope at about 9800 meters. THATS FAR. Test 2: I dumbed down the escort to crew rating 1. Results were the same as test 1. After this i re-edited the AI_sensor.dat and changed the AI hydrophone from 30K back to its default value of 6K Ran test 3: escort of crew rating 1 (unchanged from previous test) Same results, detected almost immediatly, under same conditions, only difference is the AI_hydrophone was set to 6K while all specific passives were tripled in value. Next, going to change sim.cfg hydrophones back to default values and run another 2 tests. If results are the same then going to lower hydrophone max range from Default 3, to default 2. More later. EDIT: More testing: Parameters used: Sim.cfg: -vanilla default AI_sensors.dat - AI_hydrophones = default of 6K - All passives = default 3 Test 4: DD crew rating =4 Was not detected on dive, ran at ahead slow at 50 meters. Recieved no detection notice, DD just starting pinging when within active sonar range without any warning. Test 5: DD crew rating =1 Similar results, not detected on dive, ran ahead at 50 meters at ahead slow. However this time i did recieve a detection notice, im guessing at about 1500-2K meters, Just before he starting pinging. In neither test did i try silent running, i just ran at ahead slow at 50 meters running head on into the DD to see if/when hed detect me. Clearly the settings in the sim.cfg play a MAJOR role. My thought now is to tone down the passive sonars to default, or default2 and fine tune the CFG. I should also note that all tests were with the above linked mission, calm seas, and clear weather, seems like ideal sonar conditions. I think ill run another test before chaning anything at ahead 1/3rd and see when im detected.