Selcal codes

[EK01]

Hi guys,

I have a listing of selcal codes and their functions. Some codes are listed as 'conspicuity codes'. Can somebody let me know what this means.

Cheers,

Ian

[jgrloit]

I think you mean Sqwark codes, not Selcal.
Selcall is selective Calling - Like a telephone number from a common Frequency for a specific Aircraft - Codes are Not unique worldwide but should be within each region.

Sqwark codes are transponder codes to identify an aircraft track - can show controller being worked - Scottish Mil, An Airfield etc.
Conspicuity codes can be used without specific allocation, on Takeoff etc   See NATS document  ENR 1.6.2

[EK01]

Thanks for that and, yes, it should have been squawk codes. Another senior moment !

Cheers.