33 CFR § 67.05-5
Multiple obstruction lights
August 2, 2023
§ 67.05-5 Multiple obstruction lights.
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.
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.