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Title 46

Displaying title 46, up to date as of 7/16/2026. Title 46 was last amended 6/30/2026.
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Title 46ShippingPart / Section
Chapter ICoast Guard, Department of Homeland Security1 – 199
Subchapter MTowing Vessels136 – 144
Part 143Machinery and Electrical Systems and Equipment143.100 – 143.605
Subpart AGeneral143.100 – 143.115
§ 143.100Purpose.
§ 143.105Applicability.
§ 143.115Definitions.
Subpart BRequirements for All Towing Vessels143.200 – 143.460
Subpart CRequirements for New Towing Vessels143.500 – 143.605
§ 143.500Applicability.
§ 143.510Verification of compliance with design standards.
§ 143.515Towing vessels built to recognized classification society rules.
§ 143.520Towing vessels built to American Boat and Yacht Council standards.
§ 143.540Pumps, pipes, valves, and fittings for essential systems.
§ 143.545Pressure vessels.
§ 143.550Steering systems.
§ 143.555Electrical power sources, generators, and motors.
§ 143.560Electrical distribution panels and switchboards.
§ 143.565Electrical overcurrent protection other than generators and motors.
§ 143.570Electrical grounding and ground detection.
§ 143.575Electrical conductors, connections, and equipment.
§ 143.580Alternative electrical installations.
§ 143.585General requirements for propulsion, steering, and related controls on vessels that move tank barges carrying oil or hazardous material in bulk.
§ 143.590Propulsor redundancy on vessels that move tank barges carrying oil or hazardous material in bulk.
§ 143.595Vessels with one propulsor that move tank barges carrying oil or hazardous material in bulk.
§ 143.600Alternative standards for vessels that move tank barges carrying oil or hazardous material in bulk.
§ 143.605Demonstration of compliance on vessels that move tank barges carrying oil or hazardous material in bulk.