Assertion: outer marker | /r/HasProperty | combined with non-directional beacon
Facets:
value: to make a locator outer marker
type: PURPOSE
value: often
type: TEMPORAL
value: in the united states
type: LOCATION
Source sentences:
text: In the United States, the outer marker has often been combined with a non-directional beacon (NDB) to make a locator outer marker (LOM).