The ICAO (International Civil Aviation Organization) Doc 8643 document contains designators for those aircraft types which are most commonly provided with air traffic service (ATS)
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Aviation Safety Network > ASN Aviation Safety WikiBase > ASN Aviation Safety Database results
Sling Aircraft Sling 2 - Wikipedia
Sling 2 - Sling Aircraft
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Sling LSA / Slinge 2 Ready-to-Fly - The Airplane Factory, Inc. - PDF Catalogs, Technical Documentation