BS ISO 11674:2019

What is ISO 11674 – Heading control systems about?  

ISO 11674 specifies the minimum operational, functional, and performance requirements, as well as methods of testing and the corresponding, required test results, for heading control systems installed on board ships conforming to performance standards adopted by IMO Resolution MSC.64(67), Annex 3.  

Note1: In addition, ISO 11674 takes into account parts of IMO resolution A.694(17) to which IEC 60945 is associated.  

Note2: Also it takes into account IMO resolution MSC.302(87) on bridge alert management (BAM).  

Note3: In ISO 11674, the ship models of simulators used for performance testing are based on those from ships with a combined system of propeller propulsion and conventional rudder, with a speed range of up to 30 knots.  

Note4: The test results are considered also to be valid for ships with multiple parallel operated rudders. 

Who is ISO 11674 - Heading control systems for? 

ISO 11674 on heading control systems is useful for: 

• Heading control system manufacturers 
• Shipbuilders 
• Quality control 
• Engineers  

Why should you use ISO 11674 - Heading control systems?  

Heading Control Systems is a function to keep the ship heading automatically for running at the usual speed. ISO 11674 provides requirements that should be followed while manufacturing heading control systems. ISO 11674 ensures that the heading control systems shall be capable of adapting manually or automatically to different steering characteristics of the ship under various speed, weather, and loading conditions, and provide reliable operation under prevailing environment and normal operational conditions.  

What’s changed since the last update? 

BS ISO 11674:2019 cancels and replaces BS ISO 11674:2006. 

The main changes are as follows: 

• The bridge alert management (BAM) requirement was added 
• The referenced documents such as related to BAM were added 
• The IMO performance requirements that were defined in each clauses were summarized. In addition, Clause 4 was classified into Operational requirements, Functional requirements, and Control performance requirements and the corresponding tests. 
• Because the HCS becomes the BAM compliant equipment, alerts with a 
  standard alert identifier, BAM requirements, test methods, communication procedures, and other requirements regarding implementation were added 
• In connection with the change in Clause 8, the use of BS IEC 62065:2014 ship models and wave disturbances for the HCS performance test was specified