About: http://webisa.webdatacommons.org/250355495

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	It is a magnetic compass and must be free of disturbances and loose gear such as guns and engine parts.
http://www.w3.org/ns/prov#wasQuotedFrom	maritime.org