{"data":{"id":"us/46-cfr-161.013-7","jurisdiction":"us","citation":"46 CFR 161.013-7","heading":"-7 Signal requirements.","body":"(a) An electric light must have a flash characteristic of the International Morse Code for S-O-S and, under design conditions,\n(1) Each short flash must have a duration of 1/3 second;\n(2) Each long flash must have a duration of 1 second;\n(3) The dark period between each short flash must have a duration of 1/3 second;\n(4) The dark period between each long flash must have a duration of 1/3 second;\n(5) The dark period between each letter must have a duration of 2 seconds;\n(6) The dark period between each\nS-O-S signal must have a duration of 3 seconds.\n(b) The flash characteristics described in paragraph (a) must be produced automatically when the signal is activated.","path":["Title 46—Shipping","CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY","SUBCHAPTER Q—EQUIPMENT, CONSTRUCTION, AND MATERIALS: SPECIFICATIONS AND APPROVAL","PART 161—ELECTRICAL EQUIPMENT","Subpart 161.013—Electric Distress Light for Boats"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-46.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:22Z","sha256":"0c2339fd8fffe9e20df2e0a676863db7725a5c797f7e41e180d642ce35fbf021","source_id":"us-cfr","stale":true,"prev":"us/46-cfr-161.013-5","next":"us/46-cfr-161.013-9"},"notice":"GroundRules: Original legal text. Not legal advice."}