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Old 04-21-09, 08:04 PM   #1
Captain Birdseye
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Thank you very much.

Final question (promise!)

If I use the technique linked to in the hunt thread, how can I use it for contacts that have been radioed in, such as convoys, of which I can't judge speed?
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Old 04-22-09, 08:06 AM   #2
Pisces
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Quote:
Originally Posted by Captain Birdseye View Post
Thank you very much.

Final question (promise!)

If I use the technique linked to in the hunt thread, how can I use it for contacts that have been radioed in, such as convoys, of which I can't judge speed?
First you need to calculate and plot where he is now. If it is a big convoy you get a nice speed value in knots. Except for single units (or small convoys I think), they only have a speed range. I don't know if certain mods changed it from stock Sh3 but in GWX slow is upto 7.5, medium speed is between 7.5 and 11.5 knots, fast is above 11.5 knots. But warships are different ranges. I'm pretty sure about those halve knots. I tracked them for a long time and speeds like 7.6 or a bit faster were medium speed targets. It seems the speed settings of waypoints are rounded first to the nearest knot, before it is assigned to a speed range (8kts and 12 knots in Sh3\data\Cfg\config.cfg). So, calculate distance moved based on time since the contact-icon/radio message appeared, and the speed. (worst-case if it is a speedrange, then you'll allways arive early) Remember kilometers are different from knots, 1 knot = 1 nautical mile/ hour = 1.852 kilometer/hour)

Courses are stated as N, NNE, NE, ENE, E, etc. Those are steps of 22.5 degrees. But could mean any course within 11.25 degrees on either side of it. At about 175 km along the path this course-uncertainty is as wide as your hydrophone range. So it is important to find it before it gets there if you don't want it to escape from you.

So plot the distance moved along the courseline. Draw a line to it from your current position and then do the intercept drawing based on that assumed target position.

If it was based on a speed-range, and you finally get on his central course-line you may have to wait quite a while before it enters your hydrophone range (34km). I usually move towards him while doing frequent hydrophone checks myself. The crew is too dumb to ever find it if it is on the outer edges of it.

Pfew, that's allready big part of what I wanted to say in that tutorial. Unfortunately that juicy intercept drawing really looks best if done with the ingame drawing tools. But I'm not going on a new patrol before it is done.
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Last edited by Pisces; 04-22-09 at 08:25 AM.
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Old 04-22-09, 09:04 AM   #3
XLjedi
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Insert shameless MoBo plug...

10th Patrol of U53 - Radio Contact Intercept

In this SH3 patrol report, I happen to explain (with lots of pictures) how I got from an initial radio contact to a sinking ship using MoBo and basic Fast-90 manual targeting.

Of course, you don't have to use MoBo... I just like to.

Most of the report relates to approach. The entry for time 17:38 shows specifically how to set the TDC manually on the attack map for the typical Fast-90 setup.
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Old 04-22-09, 09:21 AM   #4
Captain Birdseye
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Thank you both, both accounts are extremely useful.

Aaronblood, how does MoBo determine an intercept point? Does it recognise course and speed of the target and the u-boat or must it be done manually?


Thank you.
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Old 04-22-09, 11:11 AM   #5
Laufen zum Ziel
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Check the SHIII Printable game aids at SS Downloads. Not sure but I think there are some aids on Nav/targetting there.
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Old 04-22-09, 11:23 AM   #6
Contact
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Quote:
Originally Posted by Captain Birdseye View Post
Thank you both, both accounts are extremely useful.

Aaronblood, how does MoBo determine an intercept point? Does it recognise course and speed of the target and the u-boat or must it be done manually?


Thank you.
Aaronblood shut up, noob! . Captain Birdseye don't use that mobo s***, learn it yourself. It's not that hard really.

Last edited by Contact; 04-22-09 at 11:38 AM.
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Old 04-22-09, 12:14 PM   #7
XLjedi
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Quote:
Originally Posted by Captain Birdseye View Post
Aaronblood, how does MoBo determine an intercept point? Does it recognise course and speed of the target and the u-boat or must it be done manually?


If you plot ownship and target position along with speed/heading vectors. MoBo can automatically give you that red dotted line with the "X" that marks the point of intercept. Takes me about 5 seconds.

You can do manual intercepts with MoBo, it just takes longer to draw. And if you're going to do that, you might just as well use the in-game drawing tools.

If you really want to know the pure math formula(s) behind an intercept, I have it in an Excel workbook here:
http://www.subsim.com/radioroom/showthread.php?t=121696
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Old 04-22-09, 12:18 PM   #8
Captain Birdseye
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Thanks Aaron.

I think i'll follow the simplified picture Pisces provided in that link, and if I have more difficulties, I shall follow MoBo.

Once I master this part of the manual input, it's on to tragetting then I can be a pro kaleun!
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Old 04-22-09, 03:07 PM   #9
Otto Heinzmeir
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Sounds like all the info needed has been posted alredy. Here is my shameless self promotion of my tutorial in link below.
http://www.subsim.com/radioroom/show...eting+tutorial

Is there anyway to convert my tutorial into a pdf so I upload it to subsim?

As far as interception, the hunt thread by Wasserman covers that well. Interception isn't much different than plotting the targets course and speed.If I sight the target at say 9500m. I gets its course and speed and then extend its track out about 20k. I generally set a course to intercept the target about 12k to 15k down its track. Distance depends on how fast the target is traveling. I need to get in position without getting too close that the target can sight me. This distance varies by mod and weather but is generally 6500m during a clear day.
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