{"data":{"id":"us/33-cfr-149.535","jurisdiction":"us","citation":"33 CFR 149.535","heading":"What are the requirements for rotating beacons on platforms?","body":"In addition to obstruction lights, the tallest platform of a deepwater port must have a lit rotating beacon that distinguishes the deepwater port from other surrounding offshore structures. The beacon must:\n(a) Have an effective intensity of at least 15,000 candela;\n(b) Flash at least once every 20 seconds;\n(c) Provide a white light signal;\n(d) Operate in wind speeds of up to 100 knots at a rotation rate that is within 6 percent of the operating speed displayed on the beacon;\n(e) Have one or more leveling indicators permanently attached to the light, each with an accuracy of ±0.25 ° or better; and\n(f) Be located:\n(1) At least 60 feet (about 18.3 meters) above mean high water;\n(2) Where the structure of the platform, or equipment mounted on the platform, does not obstruct the light in any direction; and\n(3) So that it is visible all around the horizon.","path":["Title 33—Navigation and Navigable Waters","CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY","SUBCHAPTER NN—DEEPWATER PORTS","PART 149—DEEPWATER PORTS: DESIGN, CONSTRUCTION, AND EQUIPMENT","Subpart E—Aids to Navigation"],"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":"168c37fab98aea6e1d4d8582b8e3f82660fd2ffd9d5d3286c1444f340dd3fd2f","source_id":"us-cfr","stale":true,"prev":"us/33-cfr-149.520","next":"us/33-cfr-149.540"},"notice":"GroundRules: Original legal text. Not legal advice."}