And please correct me if I'm wrong:
To get bearing marks on your monitor frame from pilot's seat, with head position all the way back, you need to know your Field of View. (This also works in F4 view, zoomed into where a JU-88's wing tips touch the heads up ladder.) My FOV is 120 deg. The formula to get distance along your monitor frame from center to various angles is
d = tan(Or) x dmax / tan(FOV/2)
where dmax = max distance from center to edge of monitor screen
Or = angle of bearing to target from centerline, for 90 degree approach
This only works for aerial drops, approaching from 90 degrees to fleet's course.
For German and Japanese torpedoes, the bearing angle is 36 degrees from center. For TBM, the bearing angle is 41 degrees from center. Please note that you can't just evenly divide up the lower edge of the monitor with a uniform scale, due to FOV and the pinhole effect. That's where the trig comes in.
In game, the German and Japanese torps only have a range of 2300 yards and run time of 1 minute 40 seconds, speed of 47 mph. American torps have range of 4570 yards and run time of 4 minutes, speed of 39 mph.
Using this info and basic trigonometry, you can mark your monitor frame for how to line up torpedo drops.
I also have a way to mark the monitor frame for different fleet Angles on the Bow, like when you approach the fleet off of 90 degrees, but I haven't confirmed the math yet.
