Secondary Harmonic Safety Requirements was a 24th century technical manual written by Leah Brahms.

Subspace warp fields generated both primary and secondary subspace harmonics. In this manual, an engineer was given information on safety requirements for secondary harmonics. 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)

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