Does 14 CFR part 107 specify a minimum stand-off distance a small unmanned aircraft must keep from a person who is not directly participating in the operation?
Why: AC 107-2A § 8.3.1, p. 8-2, states directly that "Part 107 does not impose a specific stand-off distance requirement from people," leaving the remote pilot to determine an appropriate distance from the risk factors it lists.
This invents a specific 25-foot figure; no such number appears anywhere in part 107 or AC 107-2A.
This confuses the stand-off-distance question with the unrelated kinetic-energy means-of-compliance calculation in AC § 8.6.1, which computes impact speed from a free-fall drop test — that calculation has nothing to do with a required horizontal stand-off distance.