Assertion: navigable airspace | /r/HasProperty | understood
Facets:
value: generally
type: DEGREE
Source sentences:
text: This proposal draws the line at 350 feet because while navigable airspace is generally understood as existing at a minimum altitude of 500 feet, the FAA has promulgated regulations and guidance which allow for the use of model aircraft (which includes drones) at altitudes up to a maximum of 400 feet (thus leaving a 100 foot buffer space between model aircraft operations and navigable airspace).39