Of course, duh. Being in an R/D lab in my hardware days, we didn't have to have many things NIST-traceable, but we did send instruments that couldn't be quickly calibrated against house stds out for cal, cheaper than spending the time and digging up the cal equipment. My home lab has a traceable voltage std (2 Datron 4910's) that I actually send to Fluke occasionally for calibration. Why? Well, because. :) It's great that the advent of GPS now gives everyone access to high-precision frequency references.
