{"data":{"id":"us/33-cfr-67.30-10","jurisdiction":"us","citation":"33 CFR 67.30-10","heading":"-10 Sound signals.","body":"(a) The owner of a Class “C” structure shall install a sound signal if:\n(1) The structure is erected on or adjacent to the edge of a:\n(i) Navigable channel;\n(ii) Fairways; or\n(iii) Line of demarcation; and\n(2) The District Commander decides it is necessary for the safety of marine commerce.\n(b) Sound signals required by paragraph (a) of this section must have rated range of at least one-half mile, unless the District Commander prescribes a greater rated range, not to exceed 2 miles.\n(c) The owner of the structure shall operate the sound signal required by paragraph (a) of this section whenever 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.\n(d) Class “C” structures may have sound signals if:\n(1) Authorized by the District Commander under the provisions of Subpart 66.01 of this subchapter; and\n(2) The sound signal meets the requirements of § 67.10-1 (a) and (b).","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 67.30—Class “C” Requirements"],"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":"5cd0d2bbece03dc37f45723186c18cc438ec21046e0519c09722f288eaf83f4b","source_id":"us-cfr","stale":true,"prev":"us/33-cfr-67.30-5","next":"us/33-cfr-67.35-1"},"notice":"GroundRules: Original legal text. Not legal advice."}