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Which option best reflects Rule 28 — Vessels Constrained by Their Draught?
A
Three red all-round lights in a vertical line.
B
A vessel engaged in trawling shall exhibit two all round lights in a vertical line, the upper being green and the lower white.
C
Dredging vessels show red on obstructed side, green on clear side.
D
Normal navigation lights (sidelights, sternlight) when underway.