Chart Navigation & Plotting · Speed-Time-Distance
Required speed of advance: you must cover 96 NM and arrive in 8 hours. The SOA required is:
- A10 knots
- B12 knots✓ Correct
- C8 knots
- D14 knots
Explanation
Speed of advance = distance to make good / time available = 96 / 8 = 12 knots. SOA is the average speed required along the intended track to arrive on schedule.
Authority: Bowditch, American Practical Navigator (Pub. 9), speed of advance
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