2. SKYKING is a group callsign for any aircraft operating under the SIOP (if you don't have the action word on your list, the message isn't for you). I saw a talk from a former U2 spy plane pilot that mentioned receiving a SKYKING message to alert them they had been detected by hostile forces.
2. SKYKING is a group callsign for any aircraft operating under the SIOP (if you don't have the action word on your list, the message isn't for you). I saw a talk from a former U2 spy plane pilot that mentioned receiving a SKYKING message to alert them they had been detected by hostile forces.