Chart Navigation & Plotting · Sailings — Distance from dLat and Departure
For the same leg (12.0' northing and 16.0 nm easting), what is the distance made good?
- A14.0 nautical miles
- B28.0 nautical miles
- C20.0 nautical miles✓ Correct
- D18.3 nautical miles
Explanation
Distance = √(dLat² + departure²) = √(12² + 16²) = √(144 + 256) = √400 = 20.0 nm. The dLat in minutes equals nautical miles of northing, so the 3-4-5 right triangle yields a 20 nm run.
Authority: Bowditch (Pub. No. 9), plane sailing; distance from dLat and departure
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