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tor to support diesel-electric transiting between jobs. The main engines will not be changed, but will be usedonly during actual assist work. Ten Lithium-Polymer bat- teries provided by Corvus Energy will supply power for the boat?s lights and other systems not related to propul- sion and for minor maneuvering during periods of idling. A side-by-side comparison of two Foss Maritime dolphin- class tugs?the Carolyn Dorothy and a conventional tug named the Alta June ? showed significant emissions reductions, as follows: 73 percent reduction for particulate matter (PM) 51 percent reduction for nitrogen oxide (NOx) 27 percent for carbon dioxide (CO2) Aspin Kemp and Associates (AKA) is again providing the hybrid electronics and control system that tie the hybrid components together. The boat will operate simi- larly to the first Foss hybrid tug, the Carolyn Dorothy, during periods of idling and while transiting the port between jobs. However the main engines will provide full bollard pull by themselves during assists. The Campbell Foss is expected to return to service in November. www.marinelink.com MN17Installation of new hybrid equipment continues at RainierShipyard.MN#10 (1-17):MN 2011 Layouts 10/5/2011 1:34 PM Page 17