Free recognition quiz

Identify COLREGs lights, shapes, and vessel status

Direct answer

Navigation lights and day shapes identify a vessel's type, aspect, activity, and limitations. Recognition is only complete when you can connect the display with the action required by the collision regulations.

Night
Sector-aware navigation lights
Day
Vessel day-shape recognition
Levels
Day Skipper to Yachtmaster
Cost
Free, no login

The scenes show the lights visible from the stated aspect, then ask what the vessel is and what its status means for your next decision.

Open the full COLREGs module

Interactive practice

Lights and shapes trainer

Generated COLREGs quiz

Identify lights, shapes, and consequences

Question 1 of 8

Choose an answer

Vessel engaged in trawling, making way. Seen from her starboard bow: green all-round green upper, white all-round white lower, and green starboard sidelight.

identify night

What vessel is showing these lights?

Press A-D or 1-4 to answer.