California ARB reg could lead to propulsion failures

The Air Resources Board (ARB) in California has a proposed regulation under review that, if approved as expected, will require ocean going vessels to use low sulphur marine distillates in main engines, auxiliary engines, and auxiliary boilers beginning on 1 July, 2009 in regulated California waters.

The state defines regulated waters as those out to 24 nautical miles from the baseline. The US Coast Guard anticipates an increase in deep draught fuel switching and is urging industry to take proactive measures to improve fuel switching safety in an effort to prevent propulsion losses and equipment casualties. The USCG has issued a Marine Safety Notice to increase awareness and provide general guidance on fuel systems and fuel switching safety in an effort to prevent propulsion losses. A recent Coast Guard study and review of marine casualties indicate that lack of maintenance and testing of certain systems, including fuel oil systems, is one of the leading causes of propulsion failures. Proper procedures, training, and maintenance are essential for vessels to safely switch between heavy/intermediate fuel oils and marine distillates.

Additionally, vessel operators need to have a good understanding of their system requirements and limitations, and determine if any modifications may be necessary to safely switch between intended fuels.