StacksVerified U.S. regulatory reference

14 CFR §27.1399

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Each riding light required for water operation must be installed so that it can—
    1. (1)Show a white light for at least two nautical miles at night under clear atmospheric conditions; and
    2. (2)Show a maximum practicable unbroken light with the rotorcraft on the water.
  2. (b)Externally hung lights may be used.