Navigation Lights Quiz

August 6, 2011

How impressive will you be when it comes to accurately interpreting light combinations for your crew?

Answers are at the bottom of the page.

A. Sailboat less than 20 meters under sail, port side.
B. Dredging barge in excess of 50 meters, actively engaged in dredging operations, starboard side.
C. Vessel under power towing astern, over 50 meters, port side, length of tow exceeds 200 meters.
D. Harbor entrance marker buoy indicating right side of channel.


A. Vessel engaged in trawling, less than 50 meters, making way, port side .
B. Mid-channel marker buoy.
C. Sailing vessel over 50 meters under power, port side.
D. Vessel engaged in seining activity, in excess of 50 meters, restricted mobility.

A. Marker buoy indicating shoal waters.
B. Vessel less than 50 meters engaged in commercial fishing activity, not under way, viewed astern.
C. Vessel not under command, viewed from astern.
D. Sailing vessel in excess of 20 meters, hoisting sails, port side.

A. Vessel less than 20 meters with side tow, making way, starboard side.
B. Vessel less than 50 meters engaged in mine clearing operations, starboard side.
C. Commercial fishing vessel actively engaged in long lining operations, starboard side.
D. It means nothing, and should be reported to the U.S. Coast Guard as a UFO sighting.


1. C
2. A
3. C
4. B


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