Assertion: sextant | /r/ObjectUse | used on earth
Facets:
value: for centuries
type: TEMPORAL
value: aboard ships at sea
type: LOCATION
Source sentences:
text: Sextants have been used for centuries on Earth, usually aboard ships at sea, but they function aboard aircraft as well (early versions of the venerable Boeing 747 even came equipped with a sextant port for making optical sightings).