Map contacts off

[TorpX]

In your example, you got it right. If the target course is X, your course would be X+90 coming from starboard, or X-90 coming coming from port. If the X+- values are < 360 add 360, if >360 subtract 360.

What I meant to say is: If values are < 0, add 360, and if > 360, subtract 360. Sorry for the confusion.

[I'm goin' down]

add or subtract 360 degrees? That does not seem correct, because if you added 360 to 300 degrees, you end up with 300 degrees. The same result if you subtact 360 degrees (300 degrees - 360 degrees = 300 degrees.)

[Nisgeis]

Torpx means that if, after adding or subtracting 90, if your result is greater than 360, then subtract 360, but if the result is less than zero (instead of 360 as stated), then add 360.

Course = 300 from port, 300 + 90 = 390. Result is greater than 360, so subtract 360 to give steering course of 30.

Course = 45 from starboad, 45 - 90 = -45, so add 360 to get steering course of 315.

[I'm goin' down]

Originally Posted by Nisgeis

Torpx means that if, after adding or subtracting 90, if your result is greater than 360, then subtract 360, but if the result is less than zero (instead of 360 as stated), then add 360.

Course = 300 from port, 300 + 90 = 390. Result is greater than 360, so subtract 360 to give steering course of 30.

Course = 45 from starboad, 45 - 90 = -45, so add 360 to get steering course of 315.

That I can understand!

[gutted]

All you have to do is look at the target dial on the left hand side of the TDC.

I dont have the game installed, but if someone can post a closeup screenshot of that dial.. i will show you how to use it. No need for maths.

[razark]

Originally Posted by gutted

I dont have the game installed, but if someone can post a closeup screenshot of that dial.. i will show you how to use it.

How's this?

[gutted]

Ok, so you've entered the target's bearing, and entered your best guess of his AOB.

The top dial is the target, the bottom dial is you:


From looking at the dials you can see the target is on a course of 010 (0 on the target inner dial is his nose.. and wherever it points on the outer dial is his course). It currently points to 1.. .which is 010.

If you want to turn to a 90 degree attack course:
Look at where the inner 9 (.ie 90) on the target dial is OPPOSITE of your current side. You are currently on the Port side (P), so you need to look at the Startboard side (S). The "9" on the inner dial aligns with 10.. which is a course of 100.

Now look at the bottom dial and see where course 100 is in relation to you. It is aligned with "8". So if you turn your scope to 80 and issue the turn to view command, the crew will turn the ship and end up on a course of 100.

Now you are approaching from 90 degrees Port.


Keep updating the bearing and AOB as you approach to fine tune the targets course. Once you think you have it. Start using the speed tool. Whenever it gives you an estimated Speed/Course.. always check the course against the target dial. If it matches, you know the speed is probably good. If they dont match, either your AOB is wrong or the estimate itself is wrong. If you are sure you have the correct target course, consider waiting a longer timing interval. Check it against the course again. If it's still off, you can someitmes split the difference. .ie first time it says couse 80 speed 12, second time it says course 90 speed 9. So you can bet its probably course 85 speed 10-11.

Also, if you've plotted the target on the map and already know his course, you can just fiddle with the AOB until the target dial's nose is pointing to the correct course. This is easier with the Easy AOB mod.

This also comes in handy when attacking a convoy, as they are all heading the same direction. Each time you switch targets, insead of guesstimating the new targets AOB, you can fiddle with the AOB until the course on the taget dial is correct... again it's easier with the Easy AOB mod.

Also.....


The red line at the bottom of the Target dial:
Inner Shows the targets current AOB in relation to you.
Outer Shows the course from the target to you.

Red Line at the top of the Own ship Dial:
Inner shows the periscope bearing the target is currently on.
Outer shows the true course from you to the target.


If you are sneaking in with the PK on, and dont want to keep your scope up.. you can look at the inside dial of the ownship dial to get the current periscope bearing. That way you can have it pointing in the correct direction prior to poppin it out of the water. In the picture above, the target should be at bearing 124 in the scope.


The moving arrows on each dial:
Top dial shows the projected path of the torpedo when it would reach the target.

Bottom dial, the gyro angle.

[gutted]

You can also do things in reverse:

1. Send a range/bearing to the TDC.
2. Wait awhile
3. Send another range/bearing to the TDC.
4. Click the stopwatch to get the esitmated speed/course.
5. Adjust the AOB entry dial until the target dial's course matches the estimate.
6. Note which AOB that results in, and match it visually against the ship.
7. If the AOB looks correct to you, the speed should be correct as well.
8. Send the speed, and turn on the PK.
9. Then formulate your approach using the target and ownship dials. If you want to parallel the target, look at the course his nose is on. and see which persicope bearing that is for you. If you want to turn in to a 90 degree attack, you can do that easily as well.

No need for plotting on the map, or doing any math. Just use the TDC, its there for a reason.

[I'm goin' down]

quite an excellent tutorial, Captain. Thank you.