Callsign Parameters

Callsign Parameters define the airline identifiers used across vAMSYS — ICAO codes, IATA codes, ATC radio callsigns, and operator names. Each parameter can be assigned to specific fleets, controlling which callsigns are available for which aircraft types.

Accessing Callsign Parameters

In Orwell, go to Settings → Callsign Parameters. You need the Can Manage Callsign Parameter Settings permission.

Parameter Fields

Column	Description
ICAO Code	3-character ICAO airline code (e.g. BAW, RYR). ASCII characters only.
IATA Code	2-character IATA airline code (e.g. BA, FR). ASCII characters only.
ATC Radio Callsign	How ATC addresses the airline (e.g. "Speedbird", "Ryanair"). Shown in the dispatch table and used for VATSIM radar.
Operator Name	Operator display name shown in the dispatch table.
Fleets	Which fleet types can use this callsign.
Approved	Whether the parameter is approved for use.
Protected	Whether exclusive rights are held by a Virtual Airline. Only visible on some parameters.

Creating Parameters

When creating a new callsign parameter, you enter the ICAO code, IATA code, ATC radio callsign, operator name, and fleet assignments.

If the ICAO or IATA code you request matches a protected parameter (held exclusively by another Virtual Airline), you must provide a reason for the request. Your request, together with your full name and Virtual Airline support email, is sent to the rights holder for review.

Editing Parameters

Only approved parameters can be edited. You can change the ATC Radio Callsign, Operator Name, and Fleet assignments.

Permissions

Permission	Grants
Can Manage Callsign Parameter Settings	Access to Callsign Parameters management

Related

• Fleet — fleet types assigned to callsign parameters

• Booking & Dispatch Settings — callsign defaults for new routes