Step by Step for AOB

[rdhiggins]

Can someone please give me in simple terms the best approach in determining the AOB. I don't need any trig or math professors instructing me to perform a rocket equation but something simple and more accurate then what I have been doing.

Before anybody suggests that I utilize the search forum option.... trust me I have!

I have looked at the wheels, other peoples way of suggesting it... and lately I feel defeated since sometimes I feel like I am making progress and other times I feel like I took 2 steps back.

I understand what the AOB means such as if I was on the enemy ship where the placement of my sub but I just don't understand how to go about and determine the steps to determine the AOB.

99.9% of the time my shots are either way before or way after.

and by the way is the yellow tick mark in the six o'clock position of the upper dial in the TDC the target course? Or is it the white arrow?

Thank you, and appreciate any help!

[Wim Libaers]

If you don't want to calculate, make a guess based on visual appearance. To help with this, look at the recognition manual. There are three buttons in the upper right of the recognition manual, one of them will swith from a side view to front and 45° views. Compare that with what you see.

Also, if you use the automatic speed estimate in patch 1.3, look at the message window, it also includes a course estimate. Be careful, as it is quite sensitive to the accuracy of your stadimeter measurement.

[kv29]

1° there are several methods to calculate aob, use the search function
2° Always try to shoot within 1500 yards.
3° AoB is not as important as speed calculation, a couple of knots makes a world of difference

[RockNut]

1) determine enemy course, plot it on map

2) position your sub well ahead of contact, perpendicular to enemy course: your projected course should cross enemy plotted course at a right angle; use the protractor to verify if necessary.

At this point I usually come to a complete stop, 1000 yards from the target.

3) set view in periscope or TBT to 0 (zero) degrees

4A) target on your starboard/right side - point view to target and note bearing: for example 35 degrees, subtract that value (35) from 90 to get 55 in this case. That's your AOB. PORT 55 or 55 degress on the left of enemy's projected course.

4B) target on your port/left side - point view to target and note bearing: for example 300 degrees; subtract 300 from 360 to get 60 and then subtract that value (60) from 90 to get 30 in this case. That's your AOB. STARBOARD 30 or 30 degrees on the right of enemy's projected course.

Yes, it's that simple. Took me a while to learn back in the SH3 days...

[baracoeda]

http://www.youtube.com/watch?v=uG85lnyjI3w

Watch this movie and there you can see how you simply can determine the angle on bow.

When enemies are displayed on the map you simply can draw a line on the cours of the ship, on the ship and then to your sub en see what the angle is.

[rdhiggins]

Thank you for all those that have responded...:up:

Just a question does anyone know how or why enemy ships do not appear on the regular map? (they do appear on the attack map)

when I began this patrol they DID appear but then something happened and now they do not appear. I don't know if this is related but I am currently attempting to attack a convoy in storming weather, the enemy I identified is 2 Coastal Freighters and a destroyer. The Coastal Freighers are 1600 away and the destroy is about 800.

[sqk7744]

See thread 115
http://www.subsim.com/radioroom/showthread.php?t=106923&highlight=Is%2FWas

[WernerSobe]

Im Shocked.

I cant believe so many are still plotting their AoB instead of using the ingame AoB finder. Dont tell me you still dont understand how the TDC works guys...

All you have to know is targets true course which you also get from your assistant when calculating speed.

Remember that message? "Sir, the plot shows a speed of 7 knots, course 275"

You know the course all you have to do now is turn the AoB finder until the True course dial is heading 275. This method works always, at any range and any speed. You can even do this while moving or performing a turn. No caclulation and no ploting required and you can do this at 100% ralism without map contacts.

you can see how its correctly done in this tutorial. http://files.filefront.com/tdc2+0002wmv/;8089604;;/fileinfo.html

[C DuDe]

Im Shocked.

I cant believe so many are still plotting their AoB instead of using the ingame AoB finder. Dont tell me you still dont understand how the TDC works guys...

All you have to know is targets true course which you also get from your assistant when calculating speed.

Remember that message? "Sir, the plot shows a speed of 7 knots, course 275"

You know the course all you have to do now is turn the AoB finder until the True course dial is heading 275. This method works always, at any range and any speed. You can even do this while moving or performing a turn. No caclulation and no ploting required and you can do this at 100% ralism without map contacts.

you can see how its correctly done in this tutorial. http://files.filefront.com/tdc2+0002wmv/;8089604;;/fileinfo.html


:hmm: Hmmmmz, maybe I should listen to my crew more often :oops:


The way I do it is.

When getting a visual contact report I go directly to my map and plot the vessels course for an intercept.(like every one does?) then I take my ruler and draw a line over the estimated course of the vessel and then I take my triangle and set a 90* angle to the line I just made.
I could go through the whole drawing process but don’t think I have to because you’ve got your AOB right there. :know:

It’s 90* to Port or Starboard. Give or take a few degrees. :smug:

Note:
One thing you’re going to have to do is adjust those lines (a few times) when you see you’ve made an error but after a while you’ll get the hang of it and the adjustments will decrees hence giving you more time to ID the target and such.

I always peek through my periscope one last time at aprox 30* to 40* and recheck my attack map one last time at aprox 20* to 30* (before the mark turns green) to see if my assumptions (calculations) are correct.
When I’m off by a few degrees I adjust my torpedo angle accordingly on my torpedo angle gauge otherwise I adjust (and this is most of the time) the AOB and resend it to the TDC for a correct calculation.
Depending on the target, speed of the vessel and the size of it I reset the lot and do a quick recalculation and send it to the TDC.
(The torpedo depth is already set right after I ID’ed the vessel so that doesn’t have to change.

Mind you,
This only works when you’re within 1000 yards otherwise you’ll miss. That’s why you need to give your self ample time to set your self up.
When you don’t and the distance to you and the vessel is greater then 1100 yards, lets say 2000 yards the angle on which your going to have to fire the torp’s is going to be around 15* or 20* from the Zero mark. (doe’s this make sense to you? :stare: )

Simplified:
Yellow triangle turns green (and green is FIRE!!!! ;) ) at 10* to 5* within 1000yard (obviously that depends on the speed of the vessel as well) but when your at a greater distance it’s going to turn green a lot sooner, like 15* to 20*

[WernerSobe]

uhm are we talking about 100% realism? manual targeting? no contacts on map?

[RockNut]

Yes, I often don't bother with the PK and AOB finder, especially when attacking multiple targets at the same time. I simply note when the AOB on the leading target is 90 degrees and then check the AOB on the trailing target.

My ideal setup: my position is perpendicular to enemy's course. AOB of the leading target is 90 at bearing 0, second target is AOB 50 at bearing 320. That's a difference of 40 degrees. Split the difference: when the leader moves to bearing 20 its AOB is 110 and the trailer should be at bearing 340 with AOB 70. Manual TDC entry of AOB and speed (obtained from plot) allow me to hit both targets within seconds of one another. I tend to be fairly close (<1000 yards) and use fast torp settings.

I suck at measuring ranges by stadimeter, it takes me way too much time - so my periscope exposures tend to be too long. As long as I'm this close knowing the exact range is less important, but the speed estimate better be good... I guess I prefer manual targeting, without much PK help.

NO auto targeting, and I even got away from map contact updates (although I would still like those for radar contacts only while not having them for passive sound and visual contacts).

[C DuDe]

uhu, there's a drawback though... dont go to far ahead of the convoy i.e taskforce otherwise you'll loose them when they change course... happend to me in the begining when my targeting wasn't that up to speed.. thought I'd give myself a big head start. Kinda over done it and lost the convoy all together (which was a taskforce going 16knots) :damn:

I'm still not that good so I tend to go for the largest vessel or troop transport when available but it hurts me when I see 2 or 3 carriers or 1 carrier and a Kongo class vessel and can only sink one. :cry:


Side question here,

There's a topic about on the forum where you can measure speed by using the chromometer.. set your periscope to the bow of the ship and let it slide by.. multiply the time it took with *** and you have the speed.
Can't remember who made ithe scale or what the name of the topic is called :-?

[WernerSobe]

Yes, I often don't bother with the PK and AOB finder, especially when attacking multiple targets at the same time. I simply note when the AOB on the leading target is 90 degrees and then check the AOB on the trailing target.

My ideal setup: my position is perpendicular to enemy's course. AOB of the leading target is 90 at bearing 0, second target is AOB 50 at bearing 320. That's a difference of 40 degrees. Split the difference: when the leader moves to bearing 20 its AOB is 110 and the trailer should be at bearing 340 with AOB 70. Manual TDC entry of AOB and speed (obtained from plot) allow me to hit both targets within seconds of one another. I tend to be fairly close (<1000 yards) and use fast torp settings.

I suck at measuring ranges by stadimeter, it takes me way too much time - so my periscope exposures tend to be too long. As long as I'm this close knowing the exact range is less important, but the speed estimate better be good... I guess I prefer manual targeting, without much PK help.

NO auto targeting, and I even got away from map contact updates (although I would still like those for radar contacts only while not having them for passive sound and visual contacts).

Whats so hard about it. Especialy on convois you mostly already know their course and speed. So all you need is bearing and aob which is took in a matter of 5 seconds.

say you know (from radio report) the convoi is heading 275 at 7 knots. You intercept it and set up an ambush.

you prepare your attack by setting up the torpedoes and you can already set up speed. So you rise your scope and pickup a target. The first thing you do is get the range (you automaticly take bearing with range). Then set up aob its a quick process. Just turn the wheel until the small ship sighn in the upper left dial is heading 275 thats it. Activate the keeper and lower the periscope.

After the first torpedoes are released you can easily attack another ship without even deactivating the keeper. Just raise the scope, lock on another ship and take the range, correct the aob wheel to 275 if necessary. Took you another 2 seconds.

This is far more accurate then what youre doing.

[RockNut]

Hm. Sounds easy enough. Will give this a try and hopefully start thinking more about the target's true course. Maybe the position keeper and I can become friends after all.

Vielen Dank!!!



Yes, I often don't bother with the PK and AOB finder, especially when attacking multiple targets at the same time. I simply note when the AOB on the leading target is 90 degrees and then check the AOB on the trailing target.

My ideal setup: my position is perpendicular to enemy's course. AOB of the leading target is 90 at bearing 0, second target is AOB 50 at bearing 320. That's a difference of 40 degrees. Split the difference: when the leader moves to bearing 20 its AOB is 110 and the trailer should be at bearing 340 with AOB 70. Manual TDC entry of AOB and speed (obtained from plot) allow me to hit both targets within seconds of one another. I tend to be fairly close (<1000 yards) and use fast torp settings.

I suck at measuring ranges by stadimeter, it takes me way too much time - so my periscope exposures tend to be too long. As long as I'm this close knowing the exact range is less important, but the speed estimate better be good... I guess I prefer manual targeting, without much PK help.

NO auto targeting, and I even got away from map contact updates (although I would still like those for radar contacts only while not having them for passive sound and visual contacts).

Whats so hard about it. Especialy on convois you mostly already know their course and speed. So all you need is bearing and aob which is took in a matter of 5 seconds.

say you know (from radio report) the convoi is heading 275 at 7 knots. You intercept it and set up an ambush.

you prepare your attack by setting up the torpedoes and you can already set up speed. So you rise your scope and pickup a target. The first thing you do is get the range (you automaticly take bearing with range). Then set up aob its a quick process. Just turn the wheel until the small ship sighn in the upper left dial is heading 275 thats it. Activate the keeper and lower the periscope.

After the first torpedoes are released you can easily attack another ship without even deactivating the keeper. Just raise the scope, lock on another ship and take the range, correct the aob wheel to 275 if necessary. Took you another 2 seconds.

This is far more accurate then what youre doing.

[LukeFF]

To summarize what WernerSobe has said, Keep it Simple, Stu..er, Silly. :know:

The American TDC and PK of WWII was far superior to anything else being used by foreign navies. Use it to its full effect, and your success will inevitably increase.

[rdhiggins]

I like your approach WernerSobe..... very simple!!!!!

[java`s revenge]

1) determine enemy course, plot it on map

2) position your sub well ahead of contact, perpendicular to enemy course: your projected course should cross enemy plotted course at a right angle; use the protractor to verify if necessary.

At this point I usually come to a complete stop, 1000 yards from the target.

3) set view in periscope or TBT to 0 (zero) degrees

4A) target on your starboard/right side - point view to target and note bearing: for example 35 degrees, subtract that value (35) from 90 to get 55 in this case. That's your AOB. PORT 55 or 55 degress on the left of enemy's projected course.

4B) target on your port/left side - point view to target and note bearing: for example 300 degrees; subtract 300 from 360 to get 60 and then subtract that value (60) from 90 to get 30 in this case. That's your AOB. STARBOARD 30 or 30 degrees on the right of enemy's projected course.

Yes, it's that simple. Took me a while to learn back in the SH3 days...

Rocknut,
Thanks mate, i had just a quicklearn how you did it. And i had in the
torpedo tutorial a 100% hit. Will try this also in sh3. I always used the map
to get the aob. Last missions i did it on sight.

I have just begun to play shiv and i didn`t understand how to use the tools.