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39-40    ARMY AIR FORCES

[[image - drawing illustrating a right drift angle]]      
FIGURE 46.       

[[image - drawing illustrating a left drift angle]] 
FIGURE 47.

d. Wind direction.-Wind is designated by the direction from which it blows (see fig. 48).

[[image - drawing illustrating how wind direction is designated]]
FIGURE 48.

e. In determining true heading when true course is given, subtract right drift from true course. Add left drift to true course to obtain true heading.

40. Miscellaneous exercises.-a. Determine the direction (north, south, east, west, etc.) in each of the following cases:
(1)True course 180°.
(2)True course 270°.     True course west. Answer.
(3)True course 225°.   
(4)Wind from 315°.    Wind from northwest. Answer.
(5)Wind from 135°.
(6)Wind from 0°.          Wind from north. Answer.
(7)True heading 45°.
(8)True heading 90°.    True heading east. Answer.

b. Determine the true heading in each of the following cases:
(1)True course = 90°, right drift = 6°.

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Transcription Notes:
1. not sure how to transcribe graphs