[Jojojung]

Originally Posted by derstosstrupp

Two ways to go about it:
1. You can set the angle on bow to 90 right or left, the consequence of this being of course that you need to multiply your own speed by the sine of the bearing, setting that as the speed.

2. Do as in the video here, which is probably easier to be honest, and that is to set your own speed as target speed, and set the angle on bow to the bearing.

In number 2, you are letting the TDC do the trig for you.

Target speed = own speed x sine (bearing) / sine (AOB)

So you can see by that formula, since the sine of 90 = 1, why you would need to do the math for number 1. In number 2 what you are doing is setting AOB equal to the bearing, therefore eliminating that side of the equation ( sin(brg) / sin(AOB) then = 1) so you are left simply with own speed = target speed.

But let’s take a step back. This method is good and it can be used in a pinch, but it’s not perfect since you need to be at a relatively small angle on bow in order to achieve the constant bearing if approaching underwater.

A much better use for the above formula is actually on the surface after you first sight the target. Turn to what you think is parallel, and adjust own course and speed at long range until the bearing doesn’t change over a few minutes, estimate the angle on bow, then apply the formula. Then once you get a better appreciation for the course, refigure what the AOB would’ve been, go back and drop that AOB into the original formula and voila - target speed by Ausdampfen, just like in the KTBs!

Edit: Forgive me because I see you realized the same thing about that side of the equation falling off. Use method 2, it’s easier if you’re going to use this method for shooting.

Thanks a lot!



Grüße aus Deutschland (Ich habe gesehen, dass du auch ganz gut deutsch kannst ;-)