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(a) When the wind is to the right of the Course, ADD the Wind Correction to the Course.

(b) When the wind is to the left of the Course, SUBTRACT the Wind Correction from the Course.

38. Example 15. Given: Course and Wind Correction Angle

Required: Heading

A pilot is flying a Course of 236 degrees. The Wind Angle is + 146 degrees. The Wind Correction Angle is 8 degrees. What Heading should he fly?

(a) Since the Wind Angle is PLUS, the Wind Correction Angle should be added to the Course, giving a Heading of 244 degrees (236 + 8).

39. WIND DIRECTION AND VELOCITY. This problem arises when the pilot flies a known Course at a known Wind Correction Angle, True Air Speed and Ground Speed, and wishes to know the Wind Velocity and Direction.

Example 16. Given: Course, Wind Correction Angle, True Air Speed, Ground Speed

Required: Wind Direction and Velocity

A pilot flies at a True Air Speed of 165 miles per hour, a Ground Speed of 146 miles per hour (as determined by check points), and is crabbing to the right 10 degrees (compass reads 104 degrees). His course is 94 degrees. What is the Wind Direction and Velocity?

(a) Rotate the G. S. Index to 146 miles per hour.

(b) Make a pencil dot over the intersection of the 165 True Air Speed line and the 10 degree wind correction angle curve.

(c) Rotate the G. S. Index to 0.

(d) Under the dot read Wind Velocity of 34 miles per hour and Wind Angle of 60 degrees.

(e) Turn the G. S. Index to the Course, 94 degrees.

(f) Since the plane is crabbing to the right, the Wind Angle is plus (Para.37 a). Under Wind Angle of 60 degrees on the right of the arrow, find Wind Direction SSE (or more exactly 154 degrees).