Assertion: rotating gyroscope | /r/ObjectUse | used for navigation
Facets:
value: on aircraft
type: LOCATION
value: in some cases
type: TEMPORAL
Source sentences:
text: Since our planet rotates, it appears to a stationary observer on Earth that a gyroscope's axis is completing a full rotation once every 24 hours.[note 1] Such a rotating gyroscope is used for navigation in some cases, for example on aircraft, where it is known as heading indicator or directional gyro, but cannot ordinarily be used for long-term marine navigation.