Assertion: e airspace | /r/CapableOf | begin up at 14,500 feet
Facets:
value: above msl
type: LOCATION
value: over the united states
type: LOCATION
Source sentences:
text: Unless designated at a lower altitude, Class E airspace begins at 14,500 feet above MSL over the United States up to but not including 18,000 feet above MSL.