NewBee Warning! - manual targeting and such thing ...

[qjp]

Hi, found in some tuts that is it possible to find AOB using the manual targeting in simple steps
1. find speed and bearing (using hydrophone - no visual)
2. plot the target course
3. set predicted distance fron u-boat at 90 deg
4. set AoB 90 deg and speed of target
6. manipulate bearing dial (attack map) to desired target (that`s what i don`t get right)
7. Is it possible? using tools availale in game to predict AoB in that way? (I maybe miss some settings)

Ps. I came from sh4 ...
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Edit: Maybe i was't precise
Is it possible know course and speed set torpwdo computer (in game solution) to predict Angle Of Bow ?
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Another edit:
Seen above
Thanks for any reply
-.Peter.

Cheers

[Pisces]

No, to set the TDC you need to know the AOB. I don't know which tutorials you speed of but 'step 1' would not be a simple task. Atleast, if you want to do it only by hydrophone bearings.

You can determine the AOB based on the size of the target in the periscope view, based on it's length and height. It was first introduced in a mod by OLC and another mod by JoeGrundman, both assisted by Hitman. But the latest most modern mod is by makman94, the Magui mod:

http://www.subsim.com/radioroom/showthread.php?t=166320

See the 7th image in the first message.

[Puster Bill]

You *CAN* set the AOB using TMA (Target Motion Analysis), but it isn't historical. In other words, the techniques used were developed after the war. Plus, it's accurate enough to get you on a rough intercept course, but I don't think it would be accurate enough for a (non-guided) torpedo. You'd still have to take periscope observations to verify the target AOB, speed, and distance.

If you really want to try it, you can make a "Bearing Rate Computer" circular slide rule. You can find it in this thread:

http://www.subsim.com/radioroom/showthread.php?t=140423

It should look something like this when you build it:

http://img376.imageshack.us/img376/4234/bearing20rate20computerbo8.jpg

You can find the instructions for using it online.

[rodandy]

I think it is safe to say that there is no way to determine target AOB accurately using only sonar (or hydrophone) bearings. As was mentioned earlier the TMA techniques were developed much later (and are no doubt being refined as we speak). You can, however, make an estimate based on the radiated noise of the target. A contact with a 0 AOB will radiate little noise into the water and may not be detected until very close. As the AOB increases, the radiated noise will also increase and it's typical to make a detection when the target AOB is somewhere in the range of 20 - 30 degrees. If you plot the bearing over time you will see that the bearing rate is initially slow and increases until closest point of approach (CPA) and then tapers off. The radiated noise will taper off as well and machinery noise will be almost entirely masked by screw noises on a narrow stern AOB.

If your ship is moving slowly, say 2 or 3 knots, it will have a limited effect on the target relative motion, particularly if the target is moving much faster. If you pick up a contact at 030 degrees True bearing and it is moving to the right, you can make an initial guess that the AOB is somewhere near Starboard 30 and the contact course is approximately south. Again, this assumes that you are not moving fast enough to dramatically change the bearing rate yourself. If you decide that you need to close the track to get into firing position then you will need a course to the east. Whether you need to go north as well, to close the range, or south to control the range while you close the track will depend on how fast you can travel.

I don't know how accurately games such as SH5 model target noise, so I would be interested in hearing whether any of you have any success during the game with this technique.

[Canovaro]

You can find speed, bearing etc using hydrophone. Someone made a sheet how to do this.

You'll find it in this document collection:

http://www.subsim.com/radioroom/downloads.php?do=file&id=1487

There is some other stuff as wel that you may find useful.

[Canovaro]

Also check out this download: very clear explanation on how to do it!

Plus calculation tool if you want to save time.

http://www.subsim.com/radioroom/downloads.php?do=file&id=1711