33 CFR § 67.20-10 - Sound signal.

---
identifier: "/us/cfr/t33/s67.20-10"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "33 CFR § 67.20-10 - Sound signal."
title_number: 33
title_name: "Navigation and Navigable Waters"
section_number: "67.20-10"
section_name: "Sound signal."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "C"
subchapter_name: "AIDS TO NAVIGATION"
part_number: "67"
part_name: "AIDS TO NAVIGATION ON ARTIFICIAL ISLANDS AND FIXED STRUCTURES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "14 U.S.C. 503, 544; 43 U.S.C. 1333; DHS Delegation No. 00170.1, Revision No. 01.4."
regulatory_source: "CGFR 58-17, 23 FR 3377, May 20, 1958, unless otherwise noted."
cfr_part: "67"
---


# 67.20-10 Sound signal.

(a) The owner of a Class “A” structure shall:

(1) Install a sound signal that has a rated range of at least 2 miles; and,

(2) Operate the sound signal when the visibility in any direction is less than 5 miles.

(b) The District Commander may waive any requirements in paragraph (a) of this section if he or she finds that a structure is so close to other structures and so enveloped by the sound signals on other structures 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 24984, May 5, 2004]