{"data":{"id":"us/46-cfr-181.405","jurisdiction":"us","citation":"46 CFR 181.405","heading":"Spaces required to have fire detection systems.","body":"(a) The following spaces must be equipped with a fire detection and alarm system of an approved type installed in accordance with 46 CFR part 76, except when a fixed-gas fire extinguishing system that is capable of automatic discharge upon heat detection is installed or when the space is manned:\n(1) A space containing propulsion machinery.\n(2) A space containing an internal combustion engine of more than 50 hp.\n(3) A space containing an oil-fired boiler.\n(4) A space containing machinery powered by gasoline or any other fuels having a flash point of 43.3 °C (110 °F) or lower.\n(5) A space containing a fuel tank for gasoline or any other fuel having a flash point of 43.3 °C (110 °F) or lower.\n(b) [Reserved]\n(c) Vessels described by 46 CFR 175.110(c) must have an interconnected fire detection system in compliance with § 181.450 installed in all enclosed areas where passengers and crew have routine access, including accommodation spaces and machinery spaces.\n(d) An enclosed vehicle space must be fitted with a fire detection and alarm system of an approved type that is installed in accordance with part 76 of this chapter.","path":["Title 46—Shipping","CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY","SUBCHAPTER T—SMALL PASSENGER VESSELS (UNDER 100 GROSS TONS)","PART 181—FIRE PROTECTION EQUIPMENT","Subpart D—Fixed Fire Extinguishing and Detection Systems"],"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":"4391febc6d07668ea8b341c5e805b1fcad4e1038fc3da57252534ab0517c7ceb","source_id":"us-cfr","stale":true,"prev":"us/46-cfr-181.400","next":"us/46-cfr-181.410"},"notice":"GroundRules: Original legal text. Not legal advice."}