void RecordMissingAircraft(
	string icao
)

Sub RecordMissingAircraft ( 
	icao As String
)

void RecordMissingAircraft(
	String^ icao
)

abstract RecordMissingAircraft : 
        icao : string -> unit 

An aircraft is missing if it has no registration, no manufacturer, no model, no operator and the UserString1 is set to 'Missing'. If the aircraft record does not exist then it is created with the created and updated times set, along with the UserString1. If it exists and has the correct values for a missing aircraft (except for UserString1, that can be anything) then this method updates the time and forces UserString1 to Missing. Otherwise the method does nothing.