46 C.F.R. § 169.609 Exhaust systems.
Title 46 - Shipping
Engine exhaust installations and associated cooling sytems must be built in accordance with the requirements of American Boat and Yacht Council, Inc. Standard P–1, “Safe Installation of Exhaust Systems for Propulsion and Auxiliary Machinery” and the following additional requirements: (a) All exhaust installations with pressures in excess of 15 pounds per square inch gage or employing runs passing through living or working spaces must meet the material specifications of part 56 of Title 46, Code of Federal Regulations. (b) Horizontal dry exhaust pipes are permitted if they do not pass through living or berthing spaces, terminate above the deepest load waterline, are arranged to prevent entry of cold water from rough seas, and are constucted of corrosion resistant material at the hull penetration. (c) When the exhaust cooling system is separate from the engine cooling system, a suitable warning device must be provided to indicate a failure of water flow in the exhaust cooling system.
Title 46: Shipping
PART 169—SAILING SCHOOL VESSELS
Subpart 169.600—Machinery and Electrical
Internal Combustion Engine Installations
§ 169.609 Exhaust systems.
