Calculating position, real course and speed only by hydrophones!

[Hitman]

It's a good meathod even if it takes advantage of certain historical unaccurancies in the game. Anyway, those who are familiars with modern subs simulators like 688i, Sub Command or Dangerous Waters will sure learn this method very fast. It is essentially what a modern sub/frigate does all the time.

[Mittelwaechter]

:hmm: Ok gents, I'm working on your request, but it'll take some time.

@Vandecker
You're right, sometimes Konrads auxillary drawing covers a big part of the map.
Did you realize you can prepare the circle + the protractors whenever you want?


Someone sank a freighter already without visuals?
It's thrilling to follow the torpedo bubbles (F12) until the freighter appears out of the fog.

[raduz]

Originally Posted by Mittelwaechter

:hmm: Someone sank a freighter already without visuals?
It's thrilling to follow the torpedo bubbles (F12) until the freighter appears out of the fog.

as I already told before, I edited an exhaustive hydrophone tutorial describing blind shooting, too (but not only). check here:

http://www.subsim.com/radioroom/showthread.php?t=107303

[Mittelwaechter]

Stand at ease, gentlemen.

As a special service for you a live ~17 minutes tutorial how to hunt down a contact only using hydrophones.

You should have read the story starting this thread.

Link: http://files.filefront.com//;7207059;/ U42HydroHunt

The file is a Bink.exe (player included), ~ 123 MB, 512 x 384, 20 fps, hints and comments added, no cuts, no audio but in color

Don't expect to get a biscaya sightseeing-tour.
It's 08/01/1940 - midnight, heavy clouds and rain, heavy fog - U42 stays submerged at 18 meters all the time.

Dismissed!

[XanderF]

Originally Posted by Hitman

It's a good meathod even if it takes advantage of certain historical unaccurancies in the game. Anyway, those who are familiars with modern subs simulators like 688i, Sub Command or Dangerous Waters will sure learn this method very fast. It is essentially what a modern sub/frigate does all the time.

Yeah, I was going to say...it's pretty much a straight TMA solution, although without the computer to help you 'line up the dots'.

It is EXACTLY how you calculate weapon solutions in the modern sims.

[jmr]

What can I use to fast forward/rewind/pause this Bink video?

edit: Ok I downloaded the RadVideo Tools and converted it into a Microsoft Windows Media compatiable file which makes it bigger but I can fast forward etc.

[Raus]

If I hear a contact on hydrophone, and it's something I wish to attack, I go to periscope depth.

This confuses me.

[Hondo314]

Originally Posted by Mittelwaechter

Stand at ease, gentlemen.

As a special service for you a live ~17 minutes tutorial how to hunt down a contact only using hydrophones.

You should have read the story starting this thread.

Link: http://files.filefront.com//;7207059;/ U42HydroHunt

The file is a Bink.exe (player included), ~ 123 MB, 512 x 384, 20 fps, hints and comments added, no cuts, no audio but in color

Don't expect to get a biscaya sightseeing-tour.
It's 08/01/1940 - midnight, heavy clouds and rain, heavy fog - U42 stays submerged at 18 meters all the time.

Dismissed!

Thank you for the effort, but the link is dead now. Any chance of a repost?

[jmr]

I have the video but since I didn't make it I'm not sure if it would be appropriate for me to host it without the author's permission.

Besides that it was recorded in the Bink format which doesn't allow you to pause, fast forward, or rewind which is a HUGE pain in the ass because it's about 20 minutes long and it has a lot of instructions you need to follow.

I converted it the video to make it compatible with Windows Media player so you can pause, rewind, fast forward, so you can duplicate the procedure side by side with the video which makes learning the technique a helluva a lot easier. Unfortunately by converting the video to WMV format the the file size ballooned up to 335 MB.

[Canovaro]

Originally Posted by jmr

I have the video but since I didn't make it I'm not sure if it would be appropriate for me to host it without the author's permission.

Besides that it was recorded in the Bink format which doesn't allow you to pause, fast forward, or rewind which is a HUGE pain in the ass because it's about 20 minutes long and it has a lot of instructions you need to follow.

I converted it the video to make it compatible with Windows Media player so you can pause, rewind, fast forward, so you can duplicate the procedure side by side with the video which makes learning the technique a helluva a lot easier. Unfortunately by converting the video to WMV format the the file size ballooned up to 335 MB.

Have you PM'ed the author?
I'm interested in this video.

[Nuoz]

Originally Posted by Sailor Steve

Pretty good, since no one ever did that successfully in real life. Once again the game cheats.

That's probably because they had to identify the ship they were hitting to save torpedos, hitting them in the most adequate spot amd avoid a friendly hit.

[joegrundman]

This geometrical based technique is great and it really works well within certain parameters. I didn't find it so hard to understand, and it was brilliantly written. I also don't see how it can be cheating, unless the hydrophones just weren't that accurate. But in fact the technique doesn't require especially great hydrophone accuracy. I guess that it was tricky to be sure of your own absloute motion, but again, extreme accuracy isn't needed there.

In fact i think towards the end of the war, sonar based target motion analysis was being used, wasn't it?

Anyway, I've used it to sink a target blind, but i used a longitudinal spread to do so. It's accuracy under favourable conditions is marvellous, although given the chance i prefer to make visual contact before shooting.

For me, there are two kinds of situation where the conditions are not favourable. Firstly when the intial AOB is very small, the changes in bearing at the beginning are too small to be helpful, and then as the target nears the changes are too large to be able to make the third "bearing prediction line" with great accuracy.

Secondly, when the initial AOB is large, or the target is moving fast, the 16 minutes wait time means that you cannot intercept targets which may be reachable using other techniques (unless you are prepared to run on the surface without sonar contacts at all)

Still, this technique has definitely entered my box of tricks, and I love those big circles everywhere!

[jmr]

Originally Posted by Canovaro

Have you PM'ed the author?
I'm interested in this video.

I just PM'd him now but it looks like he doesn't frequent these boards all that often.

Originally Posted by joegrundman

In fact i think towards the end of the war, sonar based target motion analysis was being used, wasn't it?

Yeah I believe so as well. In fact when I'm done with my VII career I'd like to start a new one with a XXI and use this technique almost exclusively. Although like you said I still like to use the periscope to get a visual ID of what I'm targeting and to refine my firing solution.

For me, there are two kinds of situation where the conditions are not favourable. Firstly when the intial AOB is very small, the changes in bearing at the beginning are too small to be helpful, and then as the target nears the changes are too large to be able to make the third "bearing prediction line" with great accuracy.

Secondly, when the initial AOB is large, or the target is moving fast, the 16 minutes wait time means that you cannot intercept targets which may be reachable using other techniques (unless you are prepared to run on the surface without sonar contacts at all)

Aye I've found this out as well when I began learning and using this technique.

[Louis Wu]

Copied soundtrainer.mis to the singlemissions/english directory and also to a singlemissions/english/SOUNDS directory. It shows up under Single Missions, SH3 1.4b, as SOUND. Clicking on Start does nothing. What is the correct way to install Sound Trainer?

[VolvicCH]

First post in the thread might as well have been written in sanskrit......but then again i was never very good at math Oh well, i still manage to get pretty decent tonnage




Have a nice day