US – Airborne Toxic Control Measure for Auxiliary Diesel Engines  Operated on Ocean-Going Vessels At-Berth in a California Port (“At-Berth Regulation”) 2 December 2016 No.860 Download PDF (391KB) California Air Resources Board (CARB) has issued the 2017 Advisory with respect to requirements to be complied with from 1 January 2017 under the Airborne Toxic Control Measure for Auxiliary Diesel Engines Operated on Ocean-Going Vessels At-Berth in a California Port (“At-Berth Regulation”).   Overview of the At-Berth Regulation   CARB approved the At-Berth Regulation in December 2007.  The purpose of the At-Berth Regulation is to reduce emissions of diesel particulate matter (PM) and oxides of nitrogen (NOx) from auxiliary engines on vessels while at-berth at California ports [1] .  The At-Berth Regulation applies to fleets composed of container vessels, passenger vessels, or refrigerated cargo vessels.  Fleets can comply through one of two options: the Reduced Onboard Power Generation Option or the Equivalent Emissions Reduction Option.   Requirements from 1 January 2017   From 1 January 2017 the following criteria have to be satisfied under the At-Berth Regulation:   (i)  Fleets complying under the Reduced Onboard Power Generation Option must satisfy the following two criteria from 1 January 2017: Visits: At least 70 percent of a fleet’s visits to a port must satisfy the following limit on engine operation: for each visit, the auxiliary engines on the vessel cannot operate for more than three hours during the entire time the vessel is at-berth (e.g., a shore power visit); and Power Reductions: The fleet’s total onboard auxiliary engine power generation must be reduced by at least 70 percent from the fleet’s baseline power generation. (ii)  Fleets complying under the Equivalent Emissions Reduction Option must reduce NOx and PM by 70 percent or more through use of an CARB-approved technology.   Taking into account