Has anyone done this?

[dashyr]

Originally Posted by woodenboat

THANK YOU! This is excellent information! Since I'm brand new, I still have not mastered manual aiming. So, I've been playing with automatic aiming just to get familiar with the other aspects of the game. But I have badly needed to have some sort of reasonable estimate of my opponent's speed. I mean... how else do you know where to position yourself for a clean shot? Up until now, I've been taking a SWAG at it and often i find myself spending way too much time chasing a target that turns out to be outrunning me. Very frustrating. (BTW, SWAG means "super wild ass guess.")

THEREFORE, looking at your 1:37m formula, let me ask if this would also work? Watching the target for 3:14m would tell us the speed without having to multiply by two - right? Or should I STILL multiply by two? So, if a target travels 1200 yards in 3 minutes and 14 seconds, he's going 12 knots. Am I correct on this? If I am correct, this means that, if I am underwater and my target is crossing my bow at 12 knots, I might just as well let him go and wait for a juicier target because I likely cannot put on enough speed to get ahead for a clean shot. In one game, I was chasing down a couple of potential targets without this knowledge. I found myself in an absolutely perfect targeting position .... FOR THEM TO SHOOT ME! It turned out to be a pair of destroyers and I did not survive. This was also before I learned to recognize between black sonar echos and blue sonar echos. You learn real fast when you're constantly getting killed. I think I should still multiply by two. 250 yards in 1:37 is the same is 500 yards in 3:14. Jeeze I really am NOT good with math.

Those are the formulas for speed.
(Distance traveled in 3:14) x 10
1:37 x 20
From very close range I often just go for like 38s and do X40. As a rule of thumb. The longer you wait. The more precise it is.

Also when attacking convoy. BE VERY careful of your distance and speed. Escort can hear you way before they actually see you. Wich is why the most common strategy is to get ahead of them then wait close to their estimated course.

Don't try to catch up on them. Plan an interception course.

[dashyr]

This is an old video. But, it is a very good example of how to plan an attack when in an interception position. He also make use of the 3:14 technique. There is also an excellent written guide in the download section.

http://www.subsim.com/radioroom/down...o=file&id=1647
This is a rather advanced guide using the ticks on the periscope. But, it is REALLY precise.


Personally I play Operation Monsun fully modded. So im on a uboat and use a too called RAOBF to calculate all from a visual contact. wich look like this


Looks intimidating. But I can calculate the speed/AOB/RANGE very quickly without ever using the map. The RAOBF do most calculation for you. If you prefer uboats to fleet boats. You should use this mod ASAP. It is great! The RAOBF is that weird ring device around the periscope.

[De Ruyter]

Originally Posted by dashyr

If your using the ingame speed estimate it might be your problem. They tend to screw up the speed a lot. The speed of the destroyer in the training range is 10 knots if i remember well. You can also put a mark on the map where the target is then wait 1:37m and make another mark on him. If the distance between marks is 250y . multiply it by 2 and it becomes 500. well its 5 knots baby! also the aob is as the TARGET sees you and not as YOU see the target. That could be your problem too.

Could be the speed issue, I think I understand the AOB part of it. Of course, my estimate may be way off. I take their angle to me and subtract that from 360 to get my angle to them. If I see them at my 330, I put the AOB at 30, and I think I factored in the Starboard vs Port side of it. But I did not know about the tubes opening, I am probably getting a number of mistakes on the attack. I don't get much time to work on it with college and work and everything, so it may take me a while to figure this out.
I guess I am also hurrying things because I am trying to sink him in the first pass. I could stand to work on my stalking techniques, if I remember right it is a Mogami-class cruiser, so it is not like he is listening for me. That will have to be when I get some time, I will try to become comfortable in torpedo attacks before I actually try to take out the convoy.

[dashyr]

Originally Posted by De Ruyter

Could be the speed issue, I think I understand the AOB part of it. Of course, my estimate may be way off. I take their angle to me and subtract that from 360 to get my angle to them. If I see them at my 330, I put the AOB at 30, and I think I factored in the Starboard vs Port side of it. But I did not know about the tubes opening, I am probably getting a number of mistakes on the attack. I don't get much time to work on it with college and work and everything, so it may take me a while to figure this out.
I guess I am also hurrying things because I am trying to sink him in the first pass. I could stand to work on my stalking techniques, if I remember right it is a Mogami-class cruiser, so it is not like he is listening for me. That will have to be when I get some time, I will try to become comfortable in torpedo attacks before I actually try to take out the convoy.

In fact you must do exactly what you do but from the target' POV. The AOB is from the target, not you. if you got a perfect 90 angle on a enemy as an example. Following your logic the AOB would be 0. But from the target it would be 90. the correct aob in this scenario is 90. Another example if youre right behind the target ship AOB isnt 0 but 180

AOB must be understood as being at wich angle you would see you sub in relation of the bow of the ship if you were one of the poor souls of the target ship.

[De Ruyter]

Originally Posted by dashyr

In fact you must do exactly what you do but from the target' POV. The AOB is from the target, not you. if you got a perfect 90 angle on a enemy as an example. Following your logic the AOB would be 0. But from the target it would be 90. the correct aob in this scenario is 90. Another example if youre right behind the target ship AOB isnt 0 but 180

AOB must be understood as being at wich angle you would see you sub in relation of the bow of the ship if you were one of the poor souls of the target ship.

Right, if the ship is dead ahead of me, I get that I would set AOB to 90. Perhaps my math logic does not hold. Perhaps in the 330 scenario, I should set AOB to 60. That actually seems like it would make more sense, subtract the difference from 90. I don't know, I will have to work out the trigonometry of it. That may only hold if we are approaching at right angles. Considering that I am studying engineering, trig should not be that much of an issue.

[dashyr]

To calculate the aob from the map its easy. Just draw the target couse then check the angle from its course to you. This is your AOB. But if you wish to be accurate from a visual only perspective. You have to use the ticks on the periscope. But thats more complex since you need to calculate the aspect ratio. But if you play with the map updates on, after taking the speed with the 1:37 method. Simply draw a line using those mark and you will have the cource.

You can hardly be more accurate than when using the map. especially with AOB.

[De Ruyter]

Originally Posted by dashyr

To calculate the aob from the map its easy. Just draw the target couse then check the angle from its course to you. This is your AOB. But if you wish to be accurate from a visual only perspective. You have to use the ticks on the periscope. But thats more complex since you need to calculate the aspect ratio. But if you play with the map updates on, after taking the speed with the 1:37 method. Simply draw a line using those mark and you will have the cource.

You can hardly be more accurate than when using the map. especially with AOB.

Now if I do that at the start with the position keeper on, if I calculate the AOB right off the bat with the map, the position keeper keeps track of the change in position, right? I don't want to be constantly going back to the map to do calculations as the position changes.