About: http://webisa.webdatacommons.org/14323801

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 thing you call compass in this and some other reviews is a sextant ??? an instrument used to measure an angle between 2 visible objects.
http://www.w3.org/ns/prov#wasQuotedFrom	brickshow.com