About: http://webisa.webdatacommons.org/7625326

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 obstruction could be a dredging arm or a float or other equipment used to support underwater operations. (Separate requirements for special lighting of dredge pipelines are contained in Annex V to the Inland Rules.)
http://www.w3.org/ns/prov#wasQuotedFrom	navruleshandbook.com