Found "Double the Bow" formula:
AoB_2 = AoB_1 + (180 - (2*AoB_1)) , if AoB_1 < 90
not available , else
with AoB_1 is first AoB shot and AoB_2 is second AoB shot.
Example:
AoB_1 = 13
AoB_2 = 13 + (180 - (2*13)) = 167
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Robert Schmidt, LTJG
U-43
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