US: Allocated to Service Area Operations for assignment for use by Terminal/CERAP/Industry/Unique Purpose/Experimental Activities 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 UK: NATO – CAOC Uedem (activated by NOTAM via ASACS Force Command)
SBO