Operating Protocol – Subspace Harmonic Monitors was a 24th century technical manual written by Leah Brahms.

In this manual, an engineer was given step-by-step instructions for operating a subspace harmonic monitor. A copy of this manual was stored in the Subspace Warp Field Overview, a folder in the Engineering Systems Database, aboard the USS Enterprise-D in 2366. (TNG: "Booby Trap", okudagram)