Defect Name: Extraordinary sonar range

Build: HCE 2007.000

Repeatable: Y

Operating System: XP

DB used: HCDB-071223

Scenario used: User scen - ROURKE.SCm

Long Description: Extraordinary sonar range from DDG Burke and other vessels; sometimes in excess of 200nm CZs for even fairly quiet subs like Oscar and Victor III.

 

This scenario was originally built for EC2000. For the re-building process, the editor changed the suffix from SCi to SCm and then ensured that all the units were proper. No idea if this is a contributing factor for this behaviour.

 

 

Sequence to reproduce:

1. Run scen at high compression from Blue side

2. Sub contacts will just materialize at incredible ranges

 

Expected behaviour: Sonar should not have CZ contacts from 200nm+ range

Observed behaviour: Sonar contacts made at 200nm+ range

Extraordinary_sonar_range.zip

That is most certainly NOT an accepted way to change a scenario, oy. Any chance of a two unit test scen that doesn't have such a genesis?

I did some additional testing by removing the submarines and replacing them with EC2003 units and the problem did not recur.

 

This issue can be closed.

So basically, the 'bug' was an incorrect scenario build due to simply converting the extension?

That's what it appears to be. Larry used the incorrect technique and won't be trying that, again. I think that this one is resolved to everyone's satisfaction.

 

Can we get a "group hug" post icon?

I think that I have to resurrect this report. Larry insists that he didn't use improper technique in creating this [second version of the] scenario. He says that he built it from scratch, so there should not be any hidden problems with file formats.

 

Subs are now being detected right through an island and at extreme range. These aren't noisy subs, either. Once contact is with an Akula.

 

 

 

 

Defect Name: LR sub contact

Build: HCE 2007.000

Repeatable: Y

Operating System: XP

DB used: HCDB-071223

Scenario used: LR sub contact.hph

Long Description: Sonar contact from Burke is at ultra-extreme range. It should also be blocked by the island of Iceland.

 

Sequence to reproduce:

1. Burke shows sonar contact on the other side of the island

 

Expected behaviour: Sub contacts should not be behind an island and at extreme range

Observed behaviour: Sub contacts are behind an island and at extreme range

Extraordinary_sonar_range.zip

There is a definite misunderstanding here.

I did attempt to use the "quick-and-dirty-change-the-suffix" method in my first crack at Rorke's Drift.

When I found that this was an improper method that would lead to whackiness, like extreme sonar ranges, I scrapped that version and started from scratch with a blank scenario and handcrafted everything.

The version posted today to ScenShare and HarpGamer is this Mark II handcrafted scenario.

Sorry for the mix-up, but we can drive a stake through this issue and bury it again.

No, I am running the "Mark II" version of the scenario. The first one was judged by everyone to be faulty from conception. I am testing with the 'hand-crafted' second version built from scratch. That's why I now believe that it is a legitimate problem.

Early testing here shows extreme detection but not without merit. The Akulas being detected are doing 30kts. That the detection may be thru Iceland is just something that has to be lived with, as Brad said, like every other energy, in some circumstances sound in water will do strange things. I don't consider a dandy towed array detecting a cavitating nuke boat, even an Akula, to be all that improbable.

Early testing here shows extreme detection but not without merit. The Akulas being detected are doing 30kts. That the detection may be thru Iceland is just something that has to be lived with, as Brad said, like every other energy, in some circumstances sound in water will do strange things. I don't consider a dandy towed array detecting a cavitating nuke boat, even an Akula, to be all that improbable.

 

 

Erm ... I set the Burke's group to creep and ran at high time comporessdion for a while, and got a second sub detection. So, okay, ignoring the island in the way, we have a really good towed array trolling at creep speed, and a cavitating target: optimum conditions. But the range is showing on the order of 340 miles ... I'd have to agree that detection in the 10th or 11th convergence zone seems a tad excessive ...