Callsign
On July 3, 2007, Shuttle America received approval from the ICAO to change its ATC callsign from Shuttlecraft to Mercury. However, prior to the changing of the callsign to Mercury it was changed to Crossroads, but the word cross was confusing to air traffic controllers. This change was necessary due to the similar sounding Air Shuttle callsign used by Mesa Airlines. Although Mercury proved to be a suitable callsign, at busier airports and TRACONs it can often tend to sound much like "American", but with very different ranges in flight numbers between the two carriers it does not raise much of a real issue for pilots and controllers alike. The IDENT code remained the same as TCF. The IATA code of the airline has remained S5 through this time.
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