33 C.F.R. § 67.05-5 Multiple obstruction lights.
Title 33 - Navigation and Navigable Waters
When more than one obstruction light is required by this part to mark a structure, all such lights shall be operated to flash in unison.
Title 33: Navigation and Navigable Waters
PART 67—AIDS TO NAVIGATION ON ARTIFICIAL ISLANDS AND FIXED STRUCTURES
Subpart 67.05—General Requirements for Lights
§ 67.05-5 Multiple obstruction lights.
