I thought I'd post this here since the German side of play benefits most with the use of the AoB Calculator.
I "revised" the AoB Calculator that was released a year ago. I reshaped the dials to have a corrected circle outline, plus re centered the marks that you use to make the center punch hole. I found the previous dials had a "wobble" to them as you spun the dials.
Both the PDF and Power Point versions have been revised, with the date of August 30, 2012.
The AoB Calculator can be found in the "Downloads" section of this forum, under "Silent Hunter 4/Gameplay mods" or follow the links below:
AoB Calculator from PDF
AoB Calculator from Power Point
This scanned image of the calculator has the center "Compass Dial" printed on yellow card stock paper (for better contrast between the three dials).