Mod from Onealex

[casabianca]

Originally Posted by maru

Thank you, the first video you linked is the one I mentioned in my initial post. If I understand it correctly, he puts in 90° AOB at periscope 0° because his course is perpendicular to the target's course. That's one way of doing it. What I'd like to know is how to use the RAOBF disk in the attack periscope view to find the AOB.


I saw in a different video that you have to count the optical length of the target using the tick marks at the bottom of the periscope, but sadly the RAOBF disk layout in that video was different from the one used in this mod.

First identify your target then calculate the distance:
- counts the number of vertical lines to the highest point of the target.
- find the corresponding number on the middle disc (bottom numbers) and turn the disc until you have your number at the very top (opposite the 90 on the inner disc)
- reads the distance (middle disk, top numbers) displayed opposite the target height (outer disk) found in the identification book
- count the number of horizontal lines
- on your raobf disk turn the middle disk to match your distance found with the length of the target
- find the number of horizontal lines that you previously observed on the middle disk (bottom numbers) the AOB is the number located opposite on the internal disc


I hope this is clear enough for you

Good hunt

[maru]

Originally Posted by Aktungbby

maru!...I C the infamous 7-year-itch strikes again! You're on the surface again since 2017!

Haha, didn't know that was a thing. Funny coincidence.

Originally Posted by casabianca

First identify your target then calculate the distance:
- counts the number of vertical lines to the highest point of the target.
- find the corresponding number on the middle disc (bottom numbers) and turn the disc until you have your number at the very top (opposite the 90 on the inner disc)
- reads the distance (middle disk, top numbers) displayed opposite the target height (outer disk) found in the identification book
- count the number of horizontal lines
- on your raobf disk turn the middle disk to match your distance found with the length of the target
- find the number of horizontal lines that you previously observed on the middle disk (bottom numbers) the AOB is the number located opposite on the internal disc


I hope this is clear enough for you

Good hunt

Merci beaucoup . Perfectly clear, I probably got the rows wrong first time I tried. One more thing, though: I noticed the numbers on the internal disc only go to 90. What do you do when the target has an AOB greater than that? Subtract the number you found from 180?

[casabianca]

Originally Posted by maru

Haha, didn't know that was a thing. Funny coincidence.




Merci beaucoup . Perfectly clear, I probably got the rows wrong first time I tried. One more thing, though: I noticed the numbers on the internal disc only go to 90. What do you do when the target has an AOB greater than that? Subtract the number you found from 180?

Yes exactly, if the target is moving away, your AOB is 180 minus the AOB found with the disc. One more thing, if you use the 1.5x zoom you must multiply the horizontal marks by 4

[maru]

Originally Posted by casabianca

Yes exactly, if the target is moving away, your AOB is 180 minus the AOB found with the disc. One more thing, if you use the 1.5x zoom you must multiply the horizontal marks by 4

Marvellous, thank you very much.