---
kind: "section"
citation: "33 C.F.R. § 84.16"
title: "33"
number: "84.16"
heading: "Vertical sectors."
url: "https://uscodex.org/cfr/33/84.16"
---

# §84.16. 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:
  - (i) At least the required minimum intensity is maintained at all angles from 5 degrees above to 5 degrees below the horizontal;
  - (ii) 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:
- (i) At least the required minimum intensity is maintained at all angles from 5 degrees above to 5 degrees below the horizontal;
- (ii) 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.

## Notes

### Authority

Authority: Sec. 303, Pub. L. 108-293, 118 Stat. 1042 (33 U.S.C. 2071); Department of Homeland Security Delegation No. 0170.1.

### Source

Source: 79 FR 37921, July 2, 2014, unless otherwise noted.