From the American Journal of Transportation:
Seventy-eight percent of container vessels visiting here last month cut engines and plugged into landside electrical power, the Port of Oakland reported this week. It was the highest plug-in rate ever recorded in Oakland. The Port said the performance demonstrates progress in its effort to curb diesel emissions from ships.
According to Port data, 105 of 135 vessels visiting Oakland in July connected to shoreside electricity at berth. The ships then switched off auxiliary diesel engines that typically power onboard systems during port stays.
State regulators require that container shipping lines frequently calling California ports plug in at least 70 percent of their vessels. The bar gets raised to 80 percent in 2020. Until last month, the Port’s best plug-in rate had been 76 percent of all vessels in July 2017.