33 CFR 84.19 - Vertical sectors.

§ 84.19 Vertical sectors.
(a) The vertical sectors of electric lights as fitted, with the exception of lights on sailing vessels underway and on unmanned barges, shall ensure that:
(1) At least the required minimum intensity is maintained at all angles from 5 degrees above to 5 degrees below the horizontal;
(2) At least 60 percent of the required minimum intensity is maintained from 7.5 degrees above to 7.5 degrees below the horizontal.
(b) In the case of sailing vessels underway the vertical sectors of electric lights as fitted shall ensure that:
(1) At least the required minimum intensity is maintained at all angles from 5 degrees above to 5 degrees below the horizontal;
(2) At least 50 percent of the required minimum intensity is maintained from 25 degrees above to 25 degrees below the horizontal.
(c) In the case of unmanned barges the minimum required intensity of electric lights as fitted shall be maintained on the horizontal.
(d) In the case of lights other than electric lights these specifications shall be met as closely as possible
[CGD 81-008, 46 FR 62447, Dec. 24, 1981, as amended by CGD 89-024, 55 FR 3947, Feb. 6, 1990]
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(a) The masthead light of high-speed craft may be placed at a height related to the breadth of the craft lower than that prescribed in § 84.02(a)(i), provided that the base angle of the isosceles triangle formed by the sidelights and masthead light, when seen in end elevation is not less than 27°.

(b) On high-speed craft of 50 meters or more in length, the vertical separation between foremast and mainmast light of 4.5 meters required by § 84.02(k) may be modified provided that such distance shall not be less than the value determined by the following formula:

Where:
y is the height of the mainmast light above the foremast light in meters;
a is the height of the foremast light above the water surface in service condition in meters;
Ψ is the trim in service condition in degrees;
C is the horizontal separation of masthead lights in meters.
Note to § 84.19:

Refer to the International Code of Safety for High-Speed Craft, 1994 and the International Code of Safety for High-Speed Craft, 2000.

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United States Code
U.S. Code: Title 33 - NAVIGATION AND NAVIGABLE WATERS

Title 33 published on 2015-07-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 33 CFR Part 84 after this date.

  • 2015-07-27; vol. 80 # 143 - Monday, July 27, 2015
    1. 80 FR 44274 - Navigation and Navigable Waters; Technical, Organizational, and Conforming Amendments
      GPO FDSys XML | Text
      DEPARTMENT OF HOMELAND SECURITY, Coast Guard
      Final rule.
      This final rule is effective July 27, 2015.
      33 CFR Parts 3, 50, 51, 52, 62, 67, 72, 80, 82, 83, 84, 90, 96, 100, 101, 110, 117, 150, 151, 155, 156, 161, 162, 164, 165, 177, and 183