A self-propelled, scrubber barge vessel being built to to capture and treat exhaust stack emissions vessels in the Ports of Long Beach and Los Angeles is to have a Schottel propulsion system. The 26 meter long and 13 meter wide barge is to be built by the Greenbrier Marine shipyard in Portland, Oregon, for Clean Air Engineering – Maritime, Inc. (CAE-M), which develops and operates systems that remove diesel emissions from the auxiliary engines and boilers of ocean-going vessels while at berth...