33 C.F.R. Subpart 67.20—Class “A” Requirements
Title 33 - Navigation and Navigable Waters
Class “A” structures shall be the structures erected in an area where Class “A” requirements must be met. The obstruction lights shall be white lights as prescribed in Subpart 67.05 of this part. The lights shall be of sufficient candlepower as to be visible at a distance of at least five nautical miles 90 percent of the nights of the year. The lights shall be displayed not less than 20 feet above mean high water, but not at a height greater than that governed by the requirement in §67.05–1(f) that mariners be able to see at least one of the lights, regardless of the angle of approach, until within 50 feet of the structure, visibility permitting. [CGFR 58–34, 23 FR 7701, Oct. 4, 1958, as amended by USCG–2001–10714, 69 FR 24983, May 5, 2004] (a) The owner of a Class “A” structure shall: (1) Install a sound signal that has a rated range of at least 2 miles; and, (2) Operate the sound signal when the visibility in any direction is less than 5 miles. (b) The District Commander may waive any requirements in paragraph (a) of this section if he or she finds that a structure is so close to other structures and so enveloped by the sound signals on other structures that it is not a hazard to navigation. [CGD 72–74R, 37 FR 13513, July 8, 1972, as amended by USCG–2001–10714, 69 FR 24984, May 5, 2004]
Title 33: Navigation and Navigable Waters
PART 67—AIDS TO NAVIGATION ON ARTIFICIAL ISLANDS AND FIXED STRUCTURES
Subpart 67.20—Class “A” Requirements
§ 67.20-1 Class “A” structures.
§ 67.20-5 Obstruction lights.
§ 67.20-10 Sound signal.
