Originally Posted by
xrayalpha
Was told the tower just put in the XXXXs when you asked for zone transit prior by phone (as they requested at GLA and EDI after assistants were found to be unnecessary!) or the old-fashioned over the radio way.
So didn't seem helpful there not being an ICAO code for Bute (or Strathaven).
XXXX would be rejected by the system, it should be ZZZZ.
Item 13 Deparure Aerodrome
If no location indicator is specified, insert “ZZZZ” and specify the full name of the aerodrome in Item 18 preceded by “DEP/”.
If the name of the departure point is not listed in any aeronautical publication, to indicate it in Item 18 use:
- degrees and minutes of latitude and longitude.
Example: DEP/5023N02214E
Same applies for Item 18 Destination Aerodrome.