33 C.F.R. Subpart 67.25—Class “B” Requirements
Title 33 - Navigation and Navigable Waters
Class “B” structures shall be the structures erected in an area where Class “B” requirements must be met. (a) The obstruction lights shall be white lights as prescribed in Subpart 67.05 of this part and shall be of sufficient candlepower as to be visible at a distance of at least three 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 specified in §67.05–1(f), except that on Class “B” structures which are required to be marked by only one light, that light may be displayed not less than 10 feet above mean high water if the structural features preclude mounting the light within the range of heights otherwise specified in this section. (b) The District Commander may waive the requirement for obstruction lights on Class “B” structures if there is no hazard to navigation by so doing. [CGFR 58–34, 23 FR 7701, Oct. 4, 1958, as amended by CGFR 62–32, 27 FR 10101, Oct. 13, 1962] (a) The owner of a Class “B” structure shall: (1) Install a sound signal that has a rated range of at least one-half mile, except that the District Commander may— (i) Prescribe a greater rated range, not to exceed 2 miles, under the provisions of paragraph (b) of this section; or (ii) Exempt the structure from the requirements of this paragraph, under the provisions of paragraph (c) of this section; (2) Operate the sound signal when the visibility in any direction is less than 3 miles, unless the District Commander establishes a greater or lesser distance of visibility, not to exceed 5 miles, under the provisions of paragraph (b) or (c) of this section. (b) The owner of a Class “B” structure shall install a sound signal with a greater rated range or operate it at times of greater visibility than required in paragraph (a) of this section if: (1) The structure is erected on or adjacent to the edge of a: (i) Navigable channel; (ii) Fairway; or (iii) Line of demarcation; and (2) The District Commander decides a greater range or operation of the sound signal at times of greater visibility is necessary for the safety of marine commerce. (c) The District Commander may waive or relax the provisions of paragraph (a) of this section, if he or she finds that a structure is: (1) So close to other structures and so enveloped by the sound signals on other structures that it is not a hazard to navigation; or (2) So located in a shoal area 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 24983, 24984, May 5, 2004]
Title 33: Navigation and Navigable Waters
PART 67—AIDS TO NAVIGATION ON ARTIFICIAL ISLANDS AND FIXED STRUCTURES
Subpart 67.25—Class “B” Requirements
§ 67.25-1 Class “B” structures.
§ 67.25-5 Obstruction lights.
§ 67.25-10 Sound signal.
