{"data":{"id":"us/46-cfr-154.709","jurisdiction":"us","citation":"46 CFR 154.709","heading":"Cargo boil-off as fuel: Gas detection equipment.","body":"(a) The continuous gas detection system required under § 154.706(a)(2) and (b) must:\n(1) Meet § 154.1350(c), (d), and (j) through (s); and\n(2) Have a device that:\n(i) Activates an audible and visual alarm at the machinery control station and in the wheelhouse if the methane concentration reaches 1.5 percent by volume; and\n(ii) Closes the master gas fuel valve required under § 154.708(c) before the methane concentration reaches 3 percent by volume.\n(b) The number and arrangement of gas sampling points must be specially approved by the Commandant (CG-OES).","path":["Title 46—Shipping","CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY","SUBCHAPTER O—CERTAIN BULK DANGEROUS CARGOES","PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES","Subpart C—Design, Construction and Equipment"],"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":"f64a182ab729b155bad1b101d5a2b36c88cb8a8970927a12149cbea12ac85367","source_id":"us-cfr","stale":true,"prev":"us/46-cfr-154.708","next":"us/46-cfr-154.801"},"notice":"GroundRules: Original legal text. Not legal advice."}