46 C.F.R. § 78.27-1
Improper use prohibited
(a) No person shall flash or cause to be flashed the rays of a search light or other blinding light onto the bridge or into the pilothouse of any vessel under way.
(b) [Reserved]
(a) No person shall flash or cause to be flashed the rays of a search light or other blinding light onto the bridge or into the pilothouse of any vessel under way.
(b) [Reserved]