Intercept course?

[p7p8]

Originally Posted by jadervason

sometimes you simply wish to get close to a target to identify with periscope. "You shouldn't kill a man without knowing for sure you ought to." In reality there may be other reasons as well, a submarine may rendezvous with a surface vessel without first giving an exact position, as to maintain the sub's discretion.

I think this is reasonable only for civilian units. Fast warship can detect you from "good periscope range". Other complication is, you can raise periscope up to 10 kts. So you can't visual track fast target.

Originally Posted by jadervason

Even still, suppose I am attacking a fast target with a TEST-71 torpedo. Autocrew and fire control does not seem to do a good job launching torpedoes on an intercept course and the TEST-71 has limited ability to catch a 30 knot target from behind

Even when you attack from bow, your target can turn back.

Originally Posted by jadervason

To be absolutely sure of killing my target I may wish to draw to within close distance

TEST-71 have range only 8.1 nmi with max speed. That means, you should be 4-5 nmi before attack fast warship. Do you realy need "interception course" for this kind of attack? I think not.

[jadervason]

Originally Posted by rentacow

I use this: http://www.luizmonteiro.com/RA.aspx

Very handy tools on that website!

Thanks for providing that link!

Originally Posted by p7p8

I think this is reasonable only for civilian units. Fast warship can detect you from "good periscope range". Other complication is, you can raise periscope up to 10 kts. So you can't visual track fast target.


Even when you attack from bow, your target can turn back.


TEST-71 have range only 8.1 nmi with max speed. That means, you should be 4-5 nmi before attack fast warship. Do you realy need "interception course" for this kind of attack? I think not.

Suppose my orders are to kill anything in a certain area. Suppose I detect a 25 knot warship in that area and determine with good confidence he is 20 miles away. Suppose I have a 35 knot submarine armed with TEST-71 torpedoes.

The gain rate of a 40 knot TEST-71 torpedo on a 25 knot warship is 15 knots. The run time of a TEST-71 torpedo is 12.2 minutes. 15 knots is 506 yards per minute, with 12.2 minutes available run time and a 15 knot advantage, the no-escape range of a 25 knot ship against a TEST-71 torpedo is about 6150 yards or 3nm. I can hit him from further if he does not evade but I want to be sure.

Target speed was 25 knots. Target bearing was 90. Target course was 180. Target distance was 20nm. Ownship best speed is 35 knots. Using the tool linked to above we achieve this intercept solution.



Calculated intercept angle is course 136 at 35 knots for 49 minutes. 49 minutes is a long time! You could easily waste a lot of time with a poor intercept angle. I would probably run course 139 or 140 so that I would eventually be in position ahead of him, that way I could listen once in a while and verify my intercept. Then I can use my very small 3nm torpedo range to good effect. I hope this illuminates why some of us are so interested in the question "how to intercept."

[p7p8]

[p7p8]

This is only example, but almost all attacks looks very similar

0) Only bearing and bearing rate

1) waiting for TMA data, identification
2) waiting for more TMA data, identification, you have course with medium error
3) you have range, course with medium error
4) you have speed with medium error and range/course with small error
5) you have speed without error (DEMON) and all data with small error
6) preparation for attack, you have all data

Like I said before, methods for ploting "course of interception" are crap in real situations.

[Karlbannsonr]

I've read this guide 12 times. I've watched people plot a course across multiple videos. I've played the game UBOAT for 7 hours. I can't intercept anything. I can't hit any targets. I literally can't even SEE a ship anywhere. Can't get my money back bc I played it too long. Seriously just cannot understand any of this.

[Aktungbby]

I'm too dumb to do anything right

Karlbannsonr!...remain dumb, only try doing it left!