Assertion: glider's pilot | /r/CapableOf | use their competition number
Facets:
value: as their call signs
type: MANNER
Source sentences:
text: Insignias are useful in two ways: First, they are used in radio communications between gliders, as pilots use their competition number as their call signs.
text: Insignias are useful in two ways: First, they are used in radio communications between gliders, as pilots use their competition number as their call signs.