Must ask. Is anyone really having luck with Four bearing?

[pythos]

I gave up on the stationary gathering of bearing info and have just moved onto the one where bearing info is gathered while the boat is moving.
No luck.
I am following the tutorial as outlined in the PDF this thread pertains to.
Again I am getting completely wrong info.
Same mission. I know my target is headed 270. I am getting contact info every 5 minutes.
My point of confusion seems to be when I reach the point of "protracting the distance between p2/q2, and p3/q3. First thing...the diagram looks nothing like what is described. It looks more like the distance betwen P2 (R2?) and P3, and the distance between Q2 (G2?) and Q3. The term "protracting" is also causing issues. Does it mean "measure" the distance between these two points?
The reason for the parenthesized numbers is because in the description P2 changes to R2, and Q2 changes to G2.
In any case I get two solutions that are close to the target's course, But when I draw the line between Sp and Sq, my solution is almost 90 degrees off.
I looked at the 2nd version of this method and that looks 50 times more difficult than the first version. How are you all able to get this method to work, cause I just can't seem to get this. The Tutorial in the sim seemed good, but I noticed some serious bugs in it, not the least being that the sonar operator is not in fact giving those bearings being collected as he is deaf as a stump. I was really hoping the more in detail v2 of the four bearing method would help, but that too is worded horribly (only partial explanations going back to version one of the PDF), and just one helluva lot more mapping that I have a good feeling the crews of submarines did NOT have to deal with.

[pythos]

Is it possible the length of time between taking bearings has an effect?

[pythos]

I think I may have found it. I am saddened that so many viewed and no answer to the question, not even a "Hey, I have had no problems with the tecnique" kinda post. I was really surprised.

Any how, I also found out how to work the alarm clock (a very needed add on for the sim). I have so far sunk 3 ships and have done it all with Real nav. Really really challenging.

[Sjizzle]

tbh each time when i use Four bearing method always i sunk the ship ...there is also in game tutorial made by Travelly and also a video made by stoianm on youtube...

[Pisces]

I'd love to help. But I am not able to play SH5, nor have I got any idea how all the mods enhance or hamper doing the various 4-bearing routines. I also lack a bit of experience in doing the moving Kuikeg methods in practise. But do understand how it works. So I find it hard to give suggestions on what migth be going wrong in your case.


Try to use as long time intervals as possible. The key is the acceleration of bearing drift, and in how your changes in movement contribute to the relative speed between you. The bearings need to diverge into a expanding or contracting fan. Near parallel bearinglines is not going to work at all. Any inaccuracy in the plot of the bearing lines is going to cause trouble. So, make sure the direction of the bearinglines is as accurate as possible. Old lines that have not been updated for a while are useless. Make sure you check that. As I said, I have no idea how or what SH5 gives you in this regard. In general, longer interval times makes the errors small compared to the bearing differences. It helps accuracy.

Is it possible the length of time between taking bearings has an effect?
A profound yes! Slow bearing accelerations need time to show them selves.

Additionally I suggest to try things out on (graph)paper. As you can invent a target going on a known course with known speed from a known distance. You can draw checkmarks at the precise time at a known speed. A consistant mark seperation is important here! You can simulate your own movement by turning on the spot at a specific bearing. And/or make changes in speed by using a different space between your bearingline startpoints. Then all is left in how accurate you draw your lines. A sharp pencil, a pair of compasses and a parallel ruler (ruler on wheels) is very helpfull here. (I have a similar one as this: http://upload.wikimedia.org/wikipedia/commons/4/45/Rolling_parallel_ruler.jpg

[pythos]

Onto my 4th intercept and sinking. I am pretty sure it was the time intervals. Thanks for the later replies. Sorry if I whined, it just sucks when you hope for assistance and see that my post was looked at nearly 100 times and yet zero response.

That protractor is quite something by the way.

[THEBERBSTER]

Hi pythos

See my tutorial Post #22:salute:

Link to my SH5 – SH4 posts:

Step By Step Tutorials & How To Do It

Also Included Are Some Useful Download Links

http://www.subsim.com/radioroom/showthread.php?t=211804 (http://www.subsim.com/radioroom/showthread.php?t=211804)

Peter

[pythos]

Thank you for those tips. My rig recently died, and so I am in refit for now, hopefully with FINALLY getting windows 7, along with the unleashed potential of my processor and memory, plus a new graphics card, I will have one good simulator.