Situation: Army Colonel flying on a jolly in the Nimrod.
While watching an NCO operator performing his magic he keeps refering to the FS operator as "Staff". Operator informs the Colonel that he is a Flight Sergeant not a Staff Sergeant. Colonel informs the operator that if he was serving in the army he would be a Staff Sergeant. Operator corrects the colonel by stating that if he was serving in the army he would be a Brigadier!
