Chart Navigation & Plotting · Fixes — Best Angle of Cut
For the most reliable two-bearing fix, the lines of position should ideally cross at an angle near:
- A15°
- B30°
- C90°✓ Correct
- D150°
Explanation
LOPs crossing near 90° minimize the positional error from a given bearing error. Narrow angles of cut (acute or obtuse) make the fix very sensitive to small bearing errors, enlarging the area of uncertainty.
Authority: Bowditch (Pub. No. 9), selecting objects for a fix
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