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CFR > Title 33 - Navigation and Navigable Waters > CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY > SUBCHAPTER C—AIDS TO NAVIGATION (parts 60 to 76) > PART 67—AIDS TO NAVIGATION ON ARTIFICIAL ISLANDS AND FIXED STRUCTURES > SUBPART 67.05—General Requirements for Lights (§67.05-1 to §67.05-25) > 67.05-5—Multiple obstruction lights.
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.