{"data":{"id":"us/33-cfr-67.10-1","jurisdiction":"us","citation":"33 CFR 67.10-1","heading":"-1 Apparatus requirements.","body":"The sound signal required by §§ 67.20-10, 67.25-10, and 67.30-10 must:\n(a) Have its maximum intensity at a frequency between 100 and 1,100 Hertz;\n(b) Sound a 2-second blast every 20 seconds (2 seconds sound, 18 seconds silence) unless otherwise authorized by the District Commander;\n(c) Have the rated range required by § 67.20-10, § 67.25-10, or § 67.30-10;\n(d) Have a height not exceeding 25 feet;\n(e) Have not more than eight sound sources;\n(f) Be approved by the Coast Guard under § 67.10-15; and\n(g) Be permanently marked with:\n(1) The date of Coast Guard approval;\n(2) The manufacturer and date of manufacture;\n(3) A model designation;\n(4) The approved range; and\n(5) The power necessary to comply with the provisions of paragraph (c) of this section.","path":["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 67.10—General Requirements for Sound signals"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-33.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:25:35Z","sha256":"ddf08d43aa9aa24712b3034d27280fab25fb2d4068d89e55635b633f68b20b7b","source_id":"us-cfr","stale":true,"prev":"us/33-cfr-67.05-25","next":"us/33-cfr-67.10-5"},"notice":"GroundRules: Original legal text. Not legal advice."}