Assertion: airline | /r/CapableOf | use call-signs
Facets:
Source sentences:
text: Most of these call-signs are derived from the airline's trade name, but for reasons of history, marketing, or the need to reduce ambiguity in spoken English (so that pilots do not mistakenly make navigational decisions based on instructions issued to a different aircraft), some airlines and air forces use call-signs less obviously connected with their trading name.
text: Most airlines employ a call sign that is normally spoken during airband radio transmissions.
text: The airline has used a number of callsigns: