About: http://webisa.webdatacommons.org/310143208

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 cause of this difference is that the compass magnets can be influenced by magnetic fields within the aircraft due to electronic equipment and other factors.
http://www.w3.org/ns/prov#wasQuotedFrom	pilotfriend.com