Special Marks

These are yellow, with a yellow light of any rhythm. Topmark is usually an “X”. They are not “navigational marks” in the generally accepted sense, but are used to indicate such things as dredge spoil grounds, quarantine anchorages, special mooring buoys, tide poles, underwater pipes, etc  If they are can or cone shaped.

 
Click on the light below to see it flash
 
 


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