b'low speed lend themselves to some sort of batteries or energy storageroute the vessel will take, the local infrastructure, and what speeds are FOGHORN FOCUS system (ESS). However, every client is unique, with such key factorsrequired. This ensures that the propulsion system fitted is tailored and as location, fleet size, route length, and local infrastructure differingspecific to the needs of that vessels operations. greatly. With so much variation, EBDG hasnt seen a dominant propul-sion technology yet emerge.But it can be done. Both companies discussed projects theyre work-ing on that will involve shifting an existing vessel to a new propulsion Passenger vessels play an essential role in mass transit as they carrysystem. EBDG is currently looking at a project to replace a set of re-many people at once and can help to lower the amount of pollutionduction gears for ones with an electric motor power take-in to allow generated per person. The team at Incat Crowther stated that onefor slow speed operation using electric power from the onboard gen-of the tenets of mass transits role in emission reduction is to create aerator sets. For higher speed operation, the main diesels would provide compelling alternative to more carbon-intensive modes of transportboth propulsion and electrical power. Incat Crowther is working on a such as car travel. By optimizing operations, we can make passengerconversion of a ferry to zero-emissions electric power for PVA member vessels more attractive and deliver significant environmental benefits.Mackinac Island Ferry Company. As part of this project, they will con-To this end, they have worked with many clients to replace aging smallvert the once-diesel propulsion system to a fully electric system. vessels with larger vessels that are more efficient, therefore leading to greater emissions reductions per passenger.PVA member Casco Bay Lines has been working with EBDG on a 164-foot hybrid electric passenger-vehicle ferry to replace an existing die-Owners are not only turning to new propulsion technology for upcom- sel-powered ferry. Like many other operators, they have chosen hybrid ing vessels but are considering their options to switch when repoweringelectric for their new build instead of all electric. The are a number of an existing ship. There may be limitations based on a given vessel, butreasons why hybrid electric may be the better solution for an operator.there is a trend for retrofitting vessels with systems other than diesel. EBDG pointed out some of the constraints that need to be considered,One common concern is the limitation of shoreside infrastructure and such as space availability, weight distribution, and fire protection.an operator may want to evolve their fleet now, before extensive infra-These and other factors will play a part in what types of propulsionstructure can be put in place. Route length may also be a contributing systems can work on an existing vessel that is being repowered. Incatfactor in choosing hybrid electric technology. EBDG noted that vessels Crowther supports retrofits with a thorough evaluation analyzing thewith short runs, less than three to five nautical miles, spend a reason-2021_GH-Interferry_Foghorn.pdf 9 3/4/21 2:36 PMPRECISE 360 PROPULSION PLUS FULL AUXILIARY POWERCMYCMMYCY ALL OTHER FERRIESCMYTwin Disc Marine Control Drives (MCDs) allow variable propellerMARINEK ARE MISSING speedfrom full engine output to slower than engine idlewhileCONTROL splitting main engine power to drive FiFi pumps or other auxiliaryDRIVE ONE VERY IMPORTANT PART.equipment. The MCD-2000/4000/5000 series covers extended diesel power requirements from 1680 kW (2280 HP) to 5250 kW (7130 HP)with heat dissipation capabilities up to 450 kW (610 HP).And our Veth Z-drives provide 360 thrust for optimal vessel maneuverability and positioning. OUR NAME. If you want the ultimate in slow-speed maneuverability, highly accurate positioning and simultaneous, full-firefighting capability, specify Twin Disc and Veth Propulsion on your next tug build.For expert engineering assistance to assure your optimal product specifications VETH gladding-hearn.comZ-DRIVEand performance, contact Klaus@TwinDisc.com.GLADDING-HEARNSHIPBUILDINGDuclos CorporationFOGHORN 10'