Does the USAF aircraft carrying POTUS use the call sign "Air Force One" when in other countries' airspace? I could see some countries getting a bit miffed, seeing as they have their own air forces, and might ask that POTUS' aircraft use the call sign "US Air Force One".

Or is there an international agreement that POTUS is Air Force One when in other airspace?

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    $\begingroup$ I guess such military flight cannot be considered international civil aviation as defined by Chicago Convention and therefore cannot benefit from the related treaties. It likely requires a diplomatic clearance to operate in other national airspaces. The callsign is likely part of the clearance, as well as weapons aboard and non-ADS-B use, etc. This would be the same for foreign diplomatic missions in the US. $\endgroup$
    – mins
    Apr 15 at 15:46
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    $\begingroup$ When POTUS visits another country (yes, I am aware that is not the same as flying through another country's airspace), they bring an entire city and military base with them – figuring out what to call the aircraft is probably the easiest part. For example, I have a distinct memory that for one visit, all the Secret Service agents had to become deputized by the local police force, otherwise they wouldn't have been able to carry weapons. $\endgroup$ Apr 15 at 15:52
  • $\begingroup$ Related: Do military aircraft overflying other countries' airspace require special clearance? $\endgroup$
    – mins
    Apr 15 at 16:08
  • $\begingroup$ The real question would be "Is "air force" a callsign reserved for the USA with ICAO worldwide or only domestically with the FAA?" Really it comes down to what is filed in the flight plan. $\endgroup$
    – Max Power
    Apr 16 at 3:08


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