C.F.R. » Title 33 » CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY › SUBCHAPTER C—AIDS TO NAVIGATION › PART 67—AIDS TO NAVIGATION ON ARTIFICIAL ISLANDS AND FIXED STRUCTURES › Subpart 67.05—General Requirements for Lights

33 C.F.R. § 67.05-5

Multiple obstruction lights

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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.