Technical instructional film for bomb aimers, focusing on using course setting bombsights.
Reel one: Finding wind speed and direction by the three course method. Drift. The effect of drift angle and compensating. The use of the magnetic compass. The effect of changing course. The triangle of velocities. The course setting bombsight.
Reel two: An example of three course observation. Routine of observation. "Level the sight". A note on changing course. Wind direction. Wind speed. The position of the foresight. Adjustment for trail.