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-   -   Snorkel fix in RUb 1.44? (https://www.subsim.com/radioroom/showthread.php?t=85159)

Hitman 10-07-05 04:22 AM

Quote:

SnorkelFix Modlet beta Jungman July 26, 2005

The snorkel fix helps to hide the snorkel better from the enemy AI Visual sensor. It seems to be too big and is easily seen by airplanes in particular from far away and their speed.
They tend to pounce on you while snorkelling without warning.

I changed the AI_Sensors.dat from my SonarDC_20 version since they share the same file. I only made a small change to Visual MinHeight from zero to 1 meter. Place the AI_Senors.dat in DATA/Library folder. No need to start a new patrol or career. The changes take place immediately. Now let me explain some 'facts' about the snorkel.

The values for snorkel depth are mostly wrong. They will expose your Uboat. Too shallow. Run your snorkel just barely high enough to break the waves above the surface to keep your diesel engines on. Big waves are a problem as they were in real life. You will know what I mean in game trying to get the snorkel high enough to work without exposure. There is an entry to change the snorkel height 5m, and 10m for XXI, but I am not messing with that in this pack unless I have to.

Your snorkel should not be seen by airplanes or ships because you are staying below the MinHeight of the enemy Visual sensor by 1 meter. The game sim.cfg or sensor.cfg states that anything beyond half the MaxRange will be twice as hard to detect. Thus if you are 8km away, the max range for enemy visual spotting, your snorkel being under '2 meters' above water will not be seen. However, if you are under 4km to target then it will start to become spotted as the target gets closer. The same goes for the periscope. I do not want to make any more nerf to the enemy Visual sensor because then your snorkel and periscope is cloaked and never seen. This value 1m seems to do the trick.

Now, remember when cruising underwater while snorkelling, you are not invisible to a ship or airplane if they get within about 2km. That is better than the 8km. The area difference is (8/2)^2 = 16x. that is, the fast moving airplane has only 1/16 the chance to spot your snorkel if you follow proper snorkel depth manually. So you are not invincible, and heavy seas will play havok with your snorkel, as it did in real life.

Lastly, it is not the radar picking up snorkel AFAIK, maybe the late war 3 cm radar (after June 1944) may cause problems, I do not know. I have a enemy radar nerf, but it is not part of this Pak unless I see a real need for it. The last 6 months of the war was meant for you to die, and not be easy to survive.

A trick to use while snorkelling is to put your Observation scope up barely above water while cruising (even your Attack scope too facing forward, the other backwards) to detect visually airplanes within 5km (limit of periscope set in Sensors.dat to detect by crew). And remember you do not have radar detector warnings while underwater.

Another thing, you can move faster underwater than you should be allowed in real life (above 3-6 knots snorkel would break off). In game the enemy hydrophones think you are at flank speed and DD will hear you from up to 9 km away and report your position to airplanes for airstrike. So unless you move at the slowest setting, you take a huge risk of a Destroyer picking you up on their hydrophones and next thing you know a dozen airplanes are on top of you -and you never saw it coming. Listen for enemy warships in the area periodically yourself -moving fast under water with snorkel is death in the late war years.

Did I mention the sonar crew many times will not update you on ships far away off using your periscope above water -so remember that while on high TC if using the scopes to look for airplanes.

Have fun playing with your snorkel!
You are basically right about the snorkel in late war operations. The exact use the snorkel was given is following (Source: Iron Coffins & Uboat.net): During the day the U-Boots operating in british waters from 1944 onwards moved at slow speeds and 50+ meters depth using their electric engines. They avoided so the risk of being observed or detected by enemy planes from high altitude (The U-Boot is visible from above as you said...it is a big shadow in the water). During the nighttime, Boots equipped with snorkel raised to snorkel depth and ventilated + charged their batteries. U-Boots with no snorkel had to surface and run decks awash with an eye in the radar detector, ready to crash dive. Diesels were put to as many revolutions as the recharging dynamos could stand -to make a faster reload- and fingers crossed to be able to put a good load of electricity before the Boot was detected :arrgh!:

Conclusion: The fix by Jungman is hostorically speaking a correct mod, but if you operate with your U-Boot as it was doen in real life, even the normal RUB setting should not cause you trouble. Of course if you insist in going historically wrong (Use of snorkel during the day) you will have an aditional, non-historically realistic disadvantage by the exagerated detectability of your snorkel. :damn:

So, play realistically and you will be rewarded!!! :up:

Sturm 10-07-05 05:14 AM

Quote:

Originally Posted by rulle34
Is there already a new file for 1.44?
I have the snorchelfix for Rub 1.43. Is that the same file cos I can't see that there has been any changes on Ai_sensors in Rub 1.44?


RUb 1.43 and 1.44 uses same AI_Sensors.dat and neither one of them has Jungman's snorkel fix. This one http://koti.mbnet.fi/sh3/files/AI_Sensors.7z is something I made for those who want to have RUb AI_Sensors.dat with snorkel fix.

Jungman's SonarDC_Snorkel_fix AI_Sensors.dat differs from RUb AI_Sensors.dat. Don't really know which one is better but at the moment I'm using the RUb version.

rulle34 10-07-05 06:21 AM

OK. I understand. It's a file you have done. Thank's Sturm.

The thing I wonder is in 1.43 CCIP hav made some ASW mod. Is that mod in Ai_sensors?

From Rub read me you can also see that Jungmanns sonarfix is included.

The question is, if you take a Rub Ai_sensors who is modded for snorchel by CCIP and then add Jungmanns tweaking of mast height. I wonder if not that file will be too nerfed? (speculating here)

What I can understand so have CCIP changed the radarvisibility settings in Ai_sensors (is that right CCIP?) and Jungmann changed the mast height of snorchel. And if we now use a Rub Ai_sensors and use Jungmanns tweaking we will have both this moddings in the same file. Maybe the snorchel will be too nerfed and mayby even invisible then?

I just want to bring up this cos I wonder. Not any critics at all.

This is what is says about Ai_sensors in Rub 1.44 read me :

1.43
050720: Added a new ASW mod. Mod by CCIP based on work done previously by gouldjg, Jungman, Jace11 and TimeTraveller. (AI_Sensors.dat, DC_X_H.sim, DC_X_H.zon, Depth_charges.sim, Depth_charges.zon, Shells.zon). This includes Jungman's latest sonar fix.

1.3
050523: Late war sonar and depth charge effectiveness adjusted. Sonar mod by Jungman (data\Library\AI_Sensors.dat, DepthCharges.zon)


So what I can see is that in 1.3 Jungmanns sonarfix is included.
Then in 1.43 CCIP have added a ASW fix and Jungmanns sonarfix is included.

My question is is the CCIP ASW fix in Ai_sensors? If yes we maybe will have two snorchel tweaks then if adding Jungmanns modification.
:hmm:

And, if there are only two modifications in Rub Ai_sensors then maybe it's not so complicated to have it included in Rub.

Before Jungmanns snorchelfix I was always spotted by airplanes when using snorchel. Like a magnet! (using Rub)

Sturm 10-07-05 08:19 AM

Quote:

Originally Posted by rulle34
The question is, if you take a Rub Ai_sensors who is modded for snorchel by CCIP and then add Jungmanns tweaking of mast height.

Actually this snorkel fix doesn't change the snorkel height. It changes AI's ability to spot visual objects, meaning with min height set to 1m, AI can't spot targets which height is less than 1m from sea level.

Charlie901 10-07-05 08:47 AM

Where can I Download:

"Jungman's SonarDC_Snorkel_fix AI_Sensors.dat "

I want the stand alone version please (non RuB).

Thanks

Syxx_Killer 10-07-05 08:52 AM

Quite a while back I made a reply to the thread we were all discussing about the snorkel then (it is "For those who think the XXI sunks" if you're interested). I made a post about the deepest you can run with the snorkel and still recharge batteries. Here is that post:

Quote:

I quickly tested the subs and their snorkels. I wanted to see how deep I could go and still be able to breath. I used the Scapa Flow single mission. The wind in that mission is 4m/s. Here are my results:

Type VIIB/C – 12m
Type IXB/C – 14m
Type IXD2 – 15m
Type XXI – 16.5

I then edited the snorkel depth in the appropriate cfg file in each submarine's folder.

Program Files/Ubisoft/SilentHunterIII/data/Submarine

Then choose the right folder for the sub and edit the cfg.

Beery 10-07-05 09:17 AM

Quote:

Originally Posted by Jungman
It is a simple change to MinHeight for AI_Sensors.dat from zero to 1 meter...

Thanks. I will put this into RUb right away.

Sturm 10-07-05 09:37 AM

Quote:

Originally Posted by Charlie901
Where can I Download:

"Jungman's SonarDC_Snorkel_fix AI_Sensors.dat "

I want the stand alone version please (non RuB).

Thanks

http://rapidshare.de/files/3448595/SensorPak.zip.html

Hunterbear 10-07-05 12:03 PM

Thanx for the link Sturm.

This can get kinda confusing, thanks for sorting it out.

:up:

oRGy 10-07-05 12:29 PM

Quote:

Originally Posted by Sturm
Quote:

Originally Posted by rulle34
The question is, if you take a Rub Ai_sensors who is modded for snorchel by CCIP and then add Jungmanns tweaking of mast height.

Actually this snorkel fix doesn't change the snorkel height. It changes AI's ability to spot visual objects, meaning with min height set to 1m, AI can't spot targets which height is less than 1m from sea level.

Would this not affect the AI spotting your periscopes?

rulle34 10-07-05 01:01 PM

Quote:

Originally Posted by Sturm
Quote:

Originally Posted by rulle34
The question is, if you take a Rub Ai_sensors who is modded for snorchel by CCIP and then add Jungmanns tweaking of mast height.

Actually this snorkel fix doesn't change the snorkel height. It changes AI's ability to spot visual objects, meaning with min height set to 1m, AI can't spot targets which height is less than 1m from sea level.

OK, forgive my less detailknowing in this. Have CCIP made any tweaks in Ai-sensors for Rub?

Sturm 10-07-05 03:33 PM

Quote:

Originally Posted by oRGy
Would this not affect the AI spotting your periscopes?

Don't know, I haven't tested it. Maybe Jungman knows it better.

Quote:

Originally Posted by rulle34
OK, forgive my less detailknowing in this. Have CCIP made any tweaks in Ai-sensors for Rub?

You have to ask CCIP. All I know about this is how Jungman made the snorkel fix.

baxter 10-07-05 06:15 PM

Beery, you said you would add this to RUb right away...does that mean that the RUb 1.44 on your site for download has been updated or that it will be in the next release of RUb?

Kpt. Lehmann 10-07-05 06:36 PM

Quote:

Originally Posted by rulle34
Quote:

Originally Posted by Sturm
Quote:

Originally Posted by rulle34
The question is, if you take a Rub Ai_sensors who is modded for snorchel by CCIP and then add Jungmanns tweaking of mast height.

Actually this snorkel fix doesn't change the snorkel height. It changes AI's ability to spot visual objects, meaning with min height set to 1m, AI can't spot targets which height is less than 1m from sea level.

OK, forgive my less detailknowing in this. Have CCIP made any tweaks in Ai-sensors for Rub?

I'm not so sure now that the result of AI having a lessened ability to see periscope heads would be a bad idea. The AI overall is usually VERY good at spotting you in any condition. (IMHO)

It would still mean that you shouldn't be careless with periscope usage in anything but the calmest of seas.

Regarding snorkel usage speeds... 5-6 knots max speed while employing the snorkel is in line with the U-Boat Commander's Handbook which recommends 5-6 knots operational speed for small boats like the type II and 6-7 knots for larger boats... and that is surface speed.

I really like what Jungman has done with the snorkel.

baxter 10-08-05 03:13 PM

Beery, you said you would add this to RUb right away...does that mean that the RUb 1.44 on your site for download has been updated or that it will be in the next release of RUb?


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