Chart Navigation & Plotting · Sailings — Departure from Course and Distance
On the same 60-NM run at 030°T, the departure (east-west distance made good) is:
- A52' E
- B30' E✓ Correct
- C60' E
- D15' E
Explanation
Departure = distance × sin(course) = 60 × sin 30° = 60 × 0.5 = 30' of east-west distance (made good to the east on a course of 030°T).
Authority: Bowditch (Pub. No. 9), Plane Sailing
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