33 CFR § 67.10-1 - Apparatus requirements.

---
identifier: "/us/cfr/t33/s67.10-1"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "33 CFR § 67.10-1 - Apparatus requirements."
title_number: 33
title_name: "Navigation and Navigable Waters"
section_number: "67.10-1"
section_name: "Apparatus requirements."
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"
---


# 67.10-1 Apparatus requirements.

The sound signal required by §§ 67.20-10, 67.25-10, and 67.30-10 must:

(a) Have its maximum intensity at a frequency between 100 and 1,100 Hertz;

(b) Sound a 2-second blast every 20 seconds (2 seconds sound, 18 seconds silence) unless otherwise authorized by the District Commander;

(c) Have the rated range required by § 67.20-10, § 67.25-10, or § 67.30-10;

(d) Have a height not exceeding 25 feet;

(e) Have not more than eight sound sources;

(f) Be approved by the Coast Guard under § 67.10-15; and

(g) Be permanently marked with:

(1) The date of Coast Guard approval;

(2) The manufacturer and date of manufacture;

(3) A model designation;

(4) The approved range; and

(5) The power necessary to comply with the provisions of paragraph (c) of this section.