---
kind: "section"
citation: "33 C.F.R. § 67.25-10"
title: "33"
number: "67.25-10"
heading: "Sound signal."
url: "https://uscodex.org/cfr/33/67.25-10"
---

# §67.25-10. Sound signal.

- (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)](#b) of this section; or
    - (ii) Exempt the structure from the requirements of this paragraph, under the provisions of [paragraph (c)](#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)](#b) or [(c)](#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)](#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)](#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.**

## Notes

### Amendments

[CGD 72-74R, 37 FR 13513, July 8, 1972, as amended by USCG-2001-10714, 69 FR 24983, 24984, May 5, 2004]

### Authority

Authority: 14 U.S.C. 503, 544; 43 U.S.C. 1333; DHS Delegation No. 00170.1, Revision No. 01.4.

### Source

Source: CGFR 58-17, 23 FR 3377, May 20, 1958, unless otherwise noted.

### Amendments

[CGD 72-74R, 37 FR 13513, July 8, 1972, as amended by USCG-2001-10714, 69 FR 24983, 24984, May 5, 2004]