About: http://webisa.webdatacommons.org/21772190

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The largest description of buoys ( mammoth or special buoys) are to mark the approaches to channels over seaward bars and isolated shoals, rocks, or other obstructions to navigation which lie at considerable distances from the coast.
http://www.w3.org/ns/prov#wasQuotedFrom	maritime.org