In the AirForce the rank of Master Sergeant is usually referred to as "Master XXX" .. I.E. Sgt. Tucker becomes Master Tucker.
We had this guy in Alaska named Sgt. Bader. He got promoted but no-one, I mean no-one would call him Master Bader.
sucked tobe the guy that slipped...
(EDIT* my grammer sucks today)
Also a true story btw.