trainworld.us
has all the information needed......
http://trainworld.us/NF2/AA_Gun/AA_Ger.html
by the way, if Low flying, Mostly torp bommers, its better to use a angle 7-8 and 4-5
(if getting freakin close). and its time to OH your engine and evaid torps with your
own experience.
make a cross between your front and rare gun (guide are based on emden)
http://img90.imageshack.us/img90/7097/emdenguidees4.jpg
Gray: hit zone.
with this angle and the cross gunz, plus the front and rare gunz distance, you will
make a better/wider hitzone to safe yourself from TB. to kill more TB.
-if the TB are coming from 0300 , make your ship facing 0800 or 1000.
-if the TB are coming from 1200 , make your ship facing 0500 or 0700.