Assertion: mooring buoy | /r/ObjectUse | used in key
Facets:
value: as an alternative to anchoring
type: PURPOSE
value: since 1981
type: TEMPORAL
Source sentences:
text: Mooring buoys, which are 18” in diameter with a blue stripe, have been used in the Keys since 1981 as an alternative to anchoring, which can break and damage the coral reef.