Squawk
4000 |
Australia: Civil flights not involved in special operations or SAR, operating in Class G airspace in excess of 15NM offshore
US: Aircraft on a VFR Military Training Route or requiring frequent or rapid changes in altitude
US: Non-discrete code assignments in accordance with FAA Order JO 7110.65, 5-2
US: Also for use in oceanic airspace, unless another code is assigned by ATC
US: External ARTCC subsets (Discrete codes of blocks only except for first primary block, which is used as the ARTCC's non-discrete code if all discrete codes are assigned)
UK: NATO Aircraft receiving a service from AEW aircraft |
SBO