Rules of the Road · NUC / RAM / Constrained by Draft
You observe a vessel at night showing red-white-red all-round lights in a vertical line, two masthead lights, sidelights, and a sternlight. What is this vessel?
- AA vessel not under command making way
- BA vessel engaged in dredging or underwater operations making way
- CA vessel restricted in ability to maneuver and making way✓ Correct
- DA vessel constrained by her draft
Explanation
Red-white-red vertical lights identify a RAM vessel. The additional masthead lights, sidelights, and sternlight indicate she is underway and making way. A NUC vessel would show red over red, not red-white-red.
Authority: 72 COLREGS Rule 27(b)
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