SCXIIC:How to correct the errors of sonar classification?

[Stanny]

Originally Posted by Captain Nemo

Were there any other platforms other than Charlie Class showing on the narrow band selection screen?

Yes,there were also fishing boats,cargo ships and trawlers.There is a rather heavy surface traffic in that area.

Also, was there a line in narrowband at 50Hz, this normally identifies a Russian sub, not sure if the Sovremenny Class destroyer has similar characteristics though.

Yes,there was a line in the 50hz mode also and signature display showed that was a Charlie class either.

I always try to scan through broadband array first.I turn to sphere array in shallow waters,when I do not have the possibility to stream the towed array fully.

As said earlier...if you have doubts, it doesn't hurt to take a peek thru the scope or using the ESM for clasification.

Yes,I go to PD from time to time and scope arround,and both ESM and periscope show me more or less the same I see on sonar stations.

I recommend everyone to try out Seawolf's campaign in SCXIIC.There is a sub,Akula-II Class "Gepard" that performs like a monster.The only time I was able to detect her was in Akula Port Egress mission.In all other,deep blue water missions it is simply stealthy.Almost completely silent.I recognize her being there only after she fires several Shkvals at me.Today,I picked her up on towed array broadband with very weak signal,started a turn to solve out the ambiguity and lost the contact in the result.AI in SCXIIC is just rocking

[Captain Nemo]

Originally Posted by Stanny

Yes,there was a line in the 50hz mode also and signature display showed that was a Charlie class either.

I recommend everyone to try out Seawolf's campaign in SCXIIC.There is a sub,Akula-II Class "Gepard" that performs like a monster.The only time I was able to detect her was in Akula Port Egress mission.In all other,deep blue water missions it is simply stealthy.Almost completely silent.I recognize her being there only after she fires several Shkvals at me.Today,I picked her up on towed array broadband with very weak signal,started a turn to solve out the ambiguity and lost the contact in the result.AI in SCXIIC is just rocking

Did you assign a tracker in narrowband on the 50Hz line? This may sort your problem out.

When I get a chance I'm going to try the Seawolf campaign. Please remind me, did this campaign come with stock SC or do I need to download it from somewhere? I agree, the Akula can be very difficult to pick up. When I want to play a quick mission in SC I fire up 'Command Challenge' and I guarantee I don't know it's there unitil I here 'torpedo in the water'! Yep, SCXII is a great mod.

Nemo

[Stanny]

Originally Posted by Captain Nemo

Did you assign a tracker in narrowband on the 50Hz line? This may sort your problem out.

Have a look at screenshot below.It is a narrowband towed array in 50 Hz mode and it is a very weak signal of Akula-II being tracked under ice in mission "Satellite Hunt".Did you mean this method,as an usual way to detect russian subs?



I always assign trackers in broadband only.I use narrowband for classification purposes.I think,that if contact is invisible in broadband,there will be lots of problems tracking it in narrowband.For example,you may not be able to distinguish the bearing ambiguity or loose the contact while trying to do so.I prefer changing course from time to time,in order to scan different fields with towed array in broadband.I noticed,that course changes of ownship "prevent" weak contacts from escaping.

All these missions come along with a standard stock Seawolf's campaign in SC.So,I think,there is no need in downloading something.

Anyway,thanks for your help,Captain Nemo.

[sonar732]

Originally Posted by Stanny

I always assign trackers in broadband only.I use narrowband for classification purposes.I think,that if contact is invisible in broadband,there will be lots of problems tracking it in narrowband.For example,you may not be able to distinguish the bearing ambiguity or loose the contact while trying to do so.I prefer changing course from time to time,in order to scan different fields with towed array in broadband.I noticed,that course changes of ownship "prevent" weak contacts from escaping.

If you assign a tracker on a faint 50 hz tonal in NB, you'll have a better chance of detecting it earlier and a first shot probability on the platform. Think of it this way...you are looking at BB. Nothing is showing up in your STA waterfall, but you have a very faint line in ITA if you are lucky. There isn't a good enough SNR rating, so BB won't allow a tracker to be placed. However, if you go to NB, change your frequency to 100hz and place a tracker on the 50hz, you not only know that it's more than likely a sub, but also after a few speed, depth, and course changes, have a decent TMA reading when all you'd find out in BB is..."I know something is out there...don't know how far, but I know it's there"

[Stanny]

Originally Posted by sonar732

If you assign a tracker on a faint 50 hz tonal in NB, you'll have a better chance of detecting it earlier and a first shot probability on the platform.

Many thanks,I will give it a try.And what about TMA in this case?I think,it is worth launching torpedoes immediately after I get the very preliminary firing solution.

I have already made a conclusion,that the longer you try to calculate an excellent TMA solution,the less chances you have to hit the target,actually.

[sonar732]

Originally Posted by Stanny

I have already made a conclusion,that the longer you try to calculate an excellent TMA solution,the less chances you have to hit the target,actually.

Do you use the autocrew or manual TMA? I'll admit that I haven't mastered TMA yet and use the autocrew. So, with that being said...I've seen my TMA jump 15k-20k yards after receiving a new solution. There are websites out there that suggest you have your torpedo presets at every 5k-10k yards to cover this possibility.

Why in the world would you do that? In the picture perfect world, the contact you launched those three torpedos might stay along the same course...but more than likely not. So, you've just wasted three fish going down the same bearing going after something that took an evasive 45-90 degree turn away from the projected path.

Now he knows your general bearing and if his UUV got a good sniff of your torpedos early, he can launch a spread at you assuming that you have cleared dantum, he'll ignore the countermeasures you launched and utilize snapshots with a 5 degree difference.

One of strategy that I've seen is there will be a torpedo with the standard 75% range on snake pattern, then another will be either darn close or right on the exact TMA range with circle to cover the escape route.

[Stanny]

Originally Posted by sonar732

Do you use the autocrew or manual TMA?

I am using manual TMA as well as all other Seawolf's stations.I usually have no problems with working up a TMA firing solution if target keeps a steady course.

[Captain Nemo]

Originally Posted by sonar732

If you assign a tracker on a faint 50 hz tonal in NB, you'll have a better chance of detecting it earlier and a first shot probability on the platform. Think of it this way...you are looking at BB. Nothing is showing up in your STA waterfall, but you have a very faint line in ITA if you are lucky. There isn't a good enough SNR rating, so BB won't allow a tracker to be placed. However, if you go to NB, change your frequency to 100hz and place a tracker on the 50hz, you not only know that it's more than likely a sub, but also after a few speed, depth, and course changes, have a decent TMA reading when all you'd find out in BB is..."I know something is out there...don't know how far, but I know it's there"

Sonar732 has hit the nail on the head. I believe the SCX mod made detecting subs that are a long way off or are very stealthy much harder to detect in broadband. However, using the techniques described in narrowband you will detect subs much earlier and sometimes long before they appear in broadband. Since having an LCD monitor though, I have found it harder to use narrowband in this way which is a pity, my old CRT monitor was much better at showing faint tonals in narrowband.

Nemo