# 33 CFR § 67.05-10: Characteristics of obstruction lights

> Federal · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/ecfr-33-67.05-10

## Section

- **Citation:** 33 CFR § 67.05-10
- **Heading:** Characteristics of obstruction lights
- **Jurisdiction:** Federal
- **Kind:** Regulations
- **Status:** In force
- **Text as of:** September 22, 2026
- **Source:** Publisher's official text
- **Location:** Title 33—Navigation and Navigable Waters > CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY > SUBCHAPTER C—AIDS TO NAVIGATION > PART 67—AIDS TO NAVIGATION ON ARTIFICIAL ISLANDS AND FIXED STRUCTURES > Subpart 67.05—General Requirements for Lights

## Text

All obstruction lights required by this part shall be powered from a reliable power source, including auxiliary power sources as necessary. They shall display a quick-flash characteristic of approximately 60 flashes per minute, unless prescribed otherwise in the permit issued by the District Commander. Their color shall be white when marking Class “A” and “B” structures, and either white or red, as prescribed by the District Commander, when marking Class “C” structures. In determining whether white or red lights shall be authorized, the District Commander shall take into consideration matters concerning, but not necessarily limited to, the dimensions of the structure and the depth of water in which it is located; the proximity of the structure to vessel routes; the nature and amount of vessel traffic; and the effect of background lighting.

## Nearby sections

- [33 CFR § 67.01-1 § 67.01-1 Scope.](https://www.frixlaw.com/law-library/statutes/ecfr-33-67.01-1.md)
- [33 CFR § 67.01-5 § 67.01-5 Definitions.](https://www.frixlaw.com/law-library/statutes/ecfr-33-67.01-5.md)
- [33 CFR § 67.01-10 § 67.01-10 Delegation of functions.](https://www.frixlaw.com/law-library/statutes/ecfr-33-67.01-10.md)
- [33 CFR § 67.01-15 § 67.01-15 Classification of structures.](https://www.frixlaw.com/law-library/statutes/ecfr-33-67.01-15.md)
- [33 CFR § 67.01-20 § 67.01-20 Prescribing lines of demarcation.](https://www.frixlaw.com/law-library/statutes/ecfr-33-67.01-20.md)
- [33 CFR § 67.01-30 § 67.01-30 Equivalents.](https://www.frixlaw.com/law-library/statutes/ecfr-33-67.01-30.md)
- [33 CFR § 67.05-1 § 67.05-1 Arrangement of obstruction lights.](https://www.frixlaw.com/law-library/statutes/ecfr-33-67.05-1.md)
- [33 CFR § 67.05-5 § 67.05-5 Multiple obstruction lights.](https://www.frixlaw.com/law-library/statutes/ecfr-33-67.05-5.md)
- [33 CFR § 67.05-10 § 67.05-10 Characteristics of obstruction lights.](https://www.frixlaw.com/law-library/statutes/ecfr-33-67.05-10.md)
- [33 CFR § 67.05-15 § 67.05-15 Operating periods of obstruction lights.](https://www.frixlaw.com/law-library/statutes/ecfr-33-67.05-15.md)
- [33 CFR § 67.05-20 § 67.05-20 Minimum lighting requirements.](https://www.frixlaw.com/law-library/statutes/ecfr-33-67.05-20.md)
- [33 CFR § 67.05-25 § 67.05-25 Special lighting requirements.](https://www.frixlaw.com/law-library/statutes/ecfr-33-67.05-25.md)
- [33 CFR § 67.10-1 § 67.10-1 Apparatus requirements.](https://www.frixlaw.com/law-library/statutes/ecfr-33-67.10-1.md)
- [33 CFR § 67.10-5 § 67.10-5 Location requirements.](https://www.frixlaw.com/law-library/statutes/ecfr-33-67.10-5.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/ecfr-33-67.05-10. Check the current official text before relying on it. Not legal advice.