From my reading of it, if you were someone who gave NATOPS Checks (Navy) or the service equivalent, Instrument Checks (Navy, would imagine USAF/USA), there was a box for 'Check airman' when I was doing my Airline Apps thing.

As I was a NVGI and AWTI, I didn't check the box because NVG Instructor and Tactics instructor didn't meet their criteria, but Instrument Check pilot did. I got my NATOPS Instructor qualification, but never gave a checkride, so I wasn't comfortable checking "check airman" if I never gave a check.