Assertion: skydiver | /r/AtLocation | freefall speed
Facets:
value: below a certain altitude
type: LOCATION
Source sentences:
text: The FAA requires tandem parachute rigs to be equipped with a main and reserve parachute, as well as an automatic activation device (AAD), a safety device that automatically deploys the reserve parachute if it detects that the skydivers are still at freefall speed below a certain altitude.