BS EN ISO 25197:2020

What is ISO 25197 about?  

ISO 25197 specifies requirements for the design, construction, and testing of electrical/electronic steering, shift and throttle systems, and dynamic positioning control systems, or combinations thereof, on the small craft of up to 24 m length of the hull. 

Note: ISO 25197 does not apply to electric trolling motors and autopilot systems on sailing craft. 

Who is ISO 25197 for? 

ISO 25197 on electronic control systems for steering, shift, and the throttle is relevant to: 

• Ships and marine manufacturers 
• Throttle manufacturers 
• Design engineers for electronic power steering 
• Quality control personnel for electronic control system 
• Steering manufacturers 

Why should you use ISO 25197?  

Throttle is used to control the speed of an engine or the flow of fuel in an engine, or to hold down or choke. The throttle system controls an engine's power by regulating the amount of fuel or air entering the engine. It can be easily linked to engine control, and cruise control and these other systems can take the control of the throttle when necessary to help improve vehicle safety, convenience, and fuel economy. Hence, ISO 25197 is beneficial to you while designing and constructing the throttle as it gives guidance on its testing and performance. 

As a manufacturer, ISO 25197 can support you with setting up an efficient electronic steering system, that impart a high degree of precision and reliability for the aircraft to be safely operated.  

What’s changed since the last update?  

BS ISO 25197:2020 supersedes BS ISO 25197:2012. BS ISO 25197:2020 includes some technical changes with respect to BS ISO 25197:2012. These include: 

• In 7.2, on portable helms, has been revised to make it coherent when an electric propulsion motor is used 
• In 9.1 has been revised to include the fail-safe mode and the alarm policy 
• The main change is in 10.1: the request to use three different samples for all tests (except for the EMC test) has been deleted because it would have involved a great expense without having significant improvement; only one sample is used for all tests described on the subsequent subclauses 
• The durability test on the joystick described in 10.4 has been made an operational test 

In 10.5.2, all ways to conduct the salt mist test, based on different standards, have been homogenized 

• In 10.7, the shock test has been revised 
• In 10.8, the free fall test has become the drop test with the addiction of the UV test 
• The UV test, described in 10.9, has been clarified 
• In 10.10, there are many changes due to the revision of IEC 60533 and the forthcoming release of IEC 62742; to avoid any direct link to those standards, all tests previously required by IEC 60533 have been embedded and all standards cited have been added to the normative reference list.