About: http://webisa.webdatacommons.org/365261495

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	From reader Dan Murphy: How is it possible to easily determine wind direction at your altitude without using a computer, calculator, GPS, or other navigational aid?
http://www.w3.org/ns/prov#wasQuotedFrom	aopa.org