14 C.F.R. § 29.1399 Riding light.
Title 14 - Aeronautics and Space
(a) Each riding light required for water operation must be installed so that it can— (1) Show a white light for at least two miles at night under clear atmospheric conditions; and (2) Show a maximum practicable unbroken light with the rotorcraft on the water. (b) Externally hung lights may be used.
Title 14: Aeronautics and Space
PART 29—AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY ROTORCRAFT
Subpart F—Equipment
Lights
§ 29.1399 Riding light.
