Two Historical Firing Methods: Ausdampfverfahren and Auswanderungsverfahren

[derstosstrupp]

Originally Posted by John Pancoast

(old thread reborn). Good method, but only for submerged attacks due to exposing your side profile to the target resulting in a high chance of being spotted in a surface attack.

Very true! Check out my comprehensive Tutorial, that has recommendations for night attacks as well as incorporating these methods.

[John Pancoast]

Originally Posted by derstosstrupp

Very true! Check out my comprehensive Tutorial, that has recommendations for night attacks as well as incorporating these methods.

Yes, been following your links. Outstanding, thanks for the work !

[John Pancoast]

Hi again;
Been reading your "Comprehensive......" work. Question: On the overhaul, you state get to the point where the target indicates 0 aob.
My understanding of 0 degrees aob would mean the target's bow would be pointing directly at either my bow or my stern; either is 0 aob.
Is this your interpretation also ?

[derstosstrupp]

Originally Posted by John Pancoast

Hi again;
Been reading your "Comprehensive......" work. Question: On the overhaul, you state get to the point where the target indicates 0 aob.
My understanding of 0 degrees aob would mean the target's bow would be pointing directly at either my bow or my stern; either is 0 aob.
Is this your interpretation also ?

Hi John,

Thanks for taking the time to read through the tutorial. 0 AOB is the moment the target is pointing directly at you, i.e. the moment you cross his track. If he is pointing directly away from you he is at a 180 deg AOB. In other words, AOB is the the bearing to your boat if you were standing on the deck of the target.

[John Pancoast]

Originally Posted by derstosstrupp

Hi John,

Thanks for taking the time to read through the tutorial. 0 AOB is the moment the target is pointing directly at you, i.e. the moment you cross his track. If he is pointing directly away from you he is at a 180 deg AOB. In other words, AOB is the the bearing to your boat if you were standing on the deck of the target.

Great, thanks again.

[Drakken]

Probably a stupid question, but what is the overhaul maneuver?

[John Pancoast]

Originally Posted by Drakken

Probably a stupid question, but what is the overhaul maneuver?

When you're getting in front of, or "overhauling" a convoy/ship.

[Drakken]

Originally Posted by John Pancoast

When you're getting in front of, or "overhauling" a convoy/ship.

Got it now, thanks!

For the first method, how do you usually proceed with acquiring a collision course? Do you go by first adjusting your boat's course port or starboard, until the bearing remains constant, then trim slightly as you proceed or is there a formula that can be used which assigns a probable bearing difference between the two ships' bow, for a given target speed?

What do you do if the bearing suddenly changes by 1-2 degrees after more than 15 minutes? For example, in situations in which you are intercepting a target by hydrophones over long range.

[John Pancoast]

Originally Posted by Drakken

Got it now, thanks!

For the first method, how do you usually proceed with acquiring a collision course? Do you go by first adjusting your boat's course port or starboard, until the bearing remains constant, then trim slightly as you proceed or is there a formula that can be used which assigns a probable bearing difference between the two ships' bow, for a given target speed?

What do you do if the bearing suddenly changes by 1-2 degrees after more than 15 minutes? For example, in situations in which you are intercepting a target by hydrophones over long range.

I keep it simple. No math, no formulas, etc. Just keep a visual on them, and when the ship/masts are barely in view, that's where I want them.
So I adjust my course accordingly to keep it that way.

I don't intercept via hydrophones, sorry. Maybe someone else can help there.

[derstosstrupp]

Originally Posted by Drakken

Got it now, thanks!

For the first method, how do you usually proceed with acquiring a collision course? Do you go by first adjusting your boat's course port or starboard, until the bearing remains constant, then trim slightly as you proceed or is there a formula that can be used which assigns a probable bearing difference between the two ships' bow, for a given target speed?

What do you do if the bearing suddenly changes by 1-2 degrees after more than 15 minutes? For example, in situations in which you are intercepting a target by hydrophones over long range.

This is simply trial and error. I found it best to first adjust your speed until the bearing just barely changes and then fine-tune it with course changes. It really only needs to be held constant over the course of a few minutes. Also, just be aware of that the closer you are to a 90° angle on bow, The more accurate the results, since the formula divides by the sine of the angle on bow, and the further away you are from 90° the more effect small AOB estimation errors will have.

I use these methods primarily for finding target speed, whereas when I first made this post it was a way to calculate a Gyro angle for purposes of shooting, but using it to compute speed is much more useful.