Machinery - C5A

Engines, propulsion, fuel, fluid, steering and ancillary systems.


Download NSCV Sub-section C5A - Machinery PDF2.81 MB


Full title 

National Standard for Commercial Vessels 

Part C - Design and construction 

Section 5 - Engineering 

Sub-section 5A - Machinery

Current edition

Edition 1.4

Commenced 1 January 2018


NSCV C5A specifies requirements for the design, construction and installation of machinery in vessels. 

This includes, but is not limited to: 

  • internal combustion engines 
  • propulsion systems 
  • fuel systems 
  • fluid systems 
  • steering systems 
  • ancillary systems 

This subsection applies to all domestic commercial vessels. It applies differently to vessels less than 35 m in measured length to those of at least 35 m. See Clause 1.2 for details. 

Announcement No recent updates
SupersededSuperseded standards for commercial vessels
Assistance and tools 

Marine order 12—Construction—subdivision and stability, machinery and electrical installations

Guidance notices and fact sheets for domestic commercial vessel owners and operators

Uniform Shipping Laws code


Policy and Regulation Division

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Last updated: 3 August 2023