Rules of the Road · Lookout & Safe Speed
A vessel equipped with radar determines by radar plotting that risk of collision may exist. Under Rule 6, this is relevant because:
- AA radar-equipped vessel must proceed at reduced speed whenever a contact is detected within 10 miles
- BThe state of weather and sea conditions alters the interpretation of radar returns
- CRadar characteristics, efficiency, and limitations are a factor in determining safe speed✓ Correct
- DA radar-equipped vessel is always deemed to have complied with the lookout requirement
Explanation
Rule 6(b) specifically lists factors relevant to safe speed for radar-equipped vessels, including the characteristics, efficiency, and limitations of the radar equipment. A vessel must account for what radar can and cannot detect when choosing a speed that allows stopping in time.
Authority: 72 COLREGS Rule 6(b)
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