Originally Posted by
GLIDER 90
Some interesting call signs used back then for different aircraft. Was an aircraft ever allocated 2 call signs for an overseas flight like M---- / RAFAIR----- ?
Yes. The RAFAIR Callsign was a tasking number which was also related to Diplomatic Clearance and Block DipClear. For instance a bomber routed to through Italian airspace used one of two serial blocks. If it carried practice bombs it flew clear on land; if no bombs it could fly a shorter route overland.