Three red lights in a vertical line above a power-driven vessel's lights. What is she?
Lights seen at night, from top to bottom: red (centre), red (centre), red (centre), white (centre), green (left), red (right).
Show the answer
A vessel constrained by her draught. Three all-round reds mark a vessel constrained by her draught: she can only use the deep channel and cannot turn out of it. Small craft keep well clear.
