Chart Navigation & Plotting · Danger Bearing
A danger bearing to a charted lighthouse is drawn and labeled 'NMT 047°' (not more than). The vessel remains in safe water as long as the measured bearing to the lighthouse is:
- AExactly 047°
- B047° or less✓ Correct
- CMore than 047°
- DEqual to the reciprocal, 227°
Explanation
'NMT' means not more than. The danger bearing is laid tangent to the hazard; the vessel stays clear so long as the object's bearing remains at or below that value (047° or less). If the bearing exceeds 047°, the vessel has crossed onto the dangerous side of the line.
Authority: Bowditch, American Practical Navigator (Pub. 9), piloting
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