Easy AOB.....or not!

[Chubster]

Morning all.....Installed this the other night and keep trying to get a correct solution with it - without much luck

I believe I am going through all the correct procedures as when I set everything up and then switch PK on, a quick look at the attack map shows the white cross smack bang where I want it.....but...I never hit :06:

Something isnt right....the white line and cross seem to be at weird angles to the green line (what is the green line by the way, as the torp doesnt seem to follow it precisely ?)

Also I tried an experiment and used a bit of TC to see what would happen - sure enough the white cross drifts off the target ship - I thought once pk was on it would stay on it ?

The ship - a second konga battleship I am stalking is zig zagging - as i just sunk her sister ship with the good old reliable O Kane method - I assume this is why the white cross is drifting off target.

But I am still not happen with the weird angles off the white line. What should it look like in a perfect set up

[BillBam]

Also I tried an experiment and used a bit of TC to see what would happen - sure enough the white cross drifts off the target ship - I thought once pk was on it would stay on it ?



The white x and white line follows your solution, if the solution is wrong the the x and line will not match your target path.

If the white line stays on the right heading and the x lags or gets ahead of the target your speed is wrong. If the white line verse off the target course your AoB is wrong.

[magic452]

Hitting maneuvering targets with the PK is difficult, mostly because the PK assumes that the target is holding course and speed, which it isn't.
The reason the X drifts off is the ever changing AoB. The white line shows the TDC prediction of the target AoB with a constant course. If the AoB isn't right than the speed will be off as well as the target isn't moving in the direction that the PK thinks it is. The target's speed may be right but it's relative motion to your boat is not.

If you can leave the scope up long enough you have to time the zigzags to where you know when she is approaching the apex of the zig, use the AoB wheel to more or less lead the target through the turn. Get the white line to show where she will be at the time the torpedo will hit. It's an art not a science.

Just for a drill take that setup and just plot it's course on the nav map. What I do is leave the sonar in sweep mode and plot an x each time it updates, you will soon see a very predictable pattern develop. By leaving the sonar in sweep you get a timed measurement, sonar sweep updates every 30 seconds. Measure the distance between turns and you will have some very valuable info on ship movements.
1) how far it travels in 30 sec.
2) how long it takes to make one cycle.
3) How far through a cycle it will be in relation to your torpedo run time.
4) how much to lead the AoB to get a predictable firing solution.
5) how long before it reaches you predicted impact point, for O'Kane and sonar only shots.
A little practice and you will be able to get hits using not only the PK but sonar only shots and constant bearing (O'Kane,etc.) shots as well.

I use vector analysis on maneuvering targets all the time and even from fairly long range can pick out a particular ship in a convoy.

Magic

[Chubster]

Many thanks you two...I am quite liking using the AOB...having done all my attacks via the O Kane method. Unaware targets are nice and easy just gunna have to practice the ziggy zaggy ones.

What other methods do people use in this situation ?

[Chubster]

If the white line stays on the right heading and the x lags or gets ahead of the target your speed is wrong. If the white line verse off the target course your AoB is wrong.


Aha...So the white line should be in line with the ship and on the same course, if all is set up ok. Yes ?

[BillBam]

Yes because the x represents what the PK thinks is the targets current location and the white line is what the PK thinks is the targets projected course. The longer the shooting range the better the solution must be.

[Chubster]

:salute:

[sharkbit]

I hate zig-zagging ships. :damn:

I haven't tried this in SH4 and really have hadn't a lot of chances to try it in SH3 either but...
I would think that if you turn the PK off, set up a Dick O'Kane method(assuming you can get ahead of your target and get 90 degrees to the track) but set the target's speed a knot or so slower and fire at the appropriate spot, you may hit. The torpedoes won't hit at a perfect 90 degree angle, but they may hit at least. Or you can set magnetics.

When the ships zig in the game, the base course remains the same, they just zig back and forth across it which reduces their speed along that line.

:)

[Chubster]

Zig zagging ships arent a problem if you are in front, I can still hit them everythime with OKane method....but what about when you are in the midst of a convoy?

[magic452]

I haven't been in the middle lately but what I did was get a quick TDC/PK solution and use the gyro angle offset dial to make fast corrections. Again Art not science. Your shooting at short range so a perfect solution is not necessary.

Magic

[Diopos]

:sign_yeah:

Close range + firing from bow and aft tubes (less maneuvering) + convoy ships obstracting DDs and escorts makes it a very interesting attack tactic
... if you're not rammed when you reach periscope depth :)

I use it this approach alot, lately.

[I'm goin' down]

message Rocking Robbins and request his O'Kane training video. Instead of using an O'Kane attack, try an attack using manual targeting. The target should not not zig zag in the video, and you can check your set up and firing solution in he warm water of southern California, take a break and join the cast Bay Watch on the beach.

Take a look at this recent post by me in another thread.

http://www.subsim.com/radioroom/showpost.php?p=1402550&postcount=17