b'infrastructure is often not in the direct control of the ferry operator.account for service life allowances like biofouling, weight increases, A system integrator can help develop both the vessel side and shoretrim variability, and any increases in hotel loads (ex: added onboard side aspects of charging, interfacing with local utilities to bring theequipment). In addition, efforts should be made to future proof when-required power to the charging location and providing shore-basedever possible, using key lifecycle milestones like mid-life refit as target energy storage as needed. implementation dates for technological improvements. In some in-stances, designers can make space allocations and structural provisions Because a hybrid electric system architecture depends on a vesselsto accommodate future technology that will further improve a vessels operational profile and energy consumption, electrical load analysisoperational efficiency and/or emissions profile. (ELA) must be a focal point of the design effort. The naval architect and system integrator must both have a thorough understanding ofA long-term mindset also applies when considering project planning the propulsion and hotel loads at a very precise level. It is particularlyand vendor selection. Given the long lifespans of ferries, as well as the important to understand a vessels energy consumption as a functionpotentially lengthy bidding an acquisition process, it is important to of time and plan with corresponding design margins to account forselect qualified partners that will stand the test of time and provide theprojectedvariability.Operatorsshouldanticipateaddingmoresupport throughout the programs life cycle. This selection process electronic equipment over the lifespan of a vessel, given the rapid rateshould consider how parts inventory, supply chains, and documen-of development of digital technology that can enhance a ferrys safety,tation will be managed over the course of many years. Choosing an predictability, and efficiency. experienced system integrator is perhaps the most important selec-tion on a hybrid electric ferry project, as the integrator will ultimately Ferries are often designed for long lifespans (30-50 years), so it is imper- bear responsibility for the vessels performance. A qualified integra-ative to think long-term when undertaking a ferry new build project,tor will have significant experience designing hybrid and zero emis-particularly when innovative technology is involved. This mindsetsion systems, managing complex global supply chains, and working includes sizing equipment with the full lifespan of the vessel in mind.through compliance requirements for emerging technology with the For hybrid electric vessels, the energy storage is typically sized in initialnecessary authorities. The key is to select and involve a system inte-design loop, and the energy requirements often increase as the vesselgrator as early in the design process as possible, as their expertise will design matures. The designer needs to use design margins to man- be most beneficial when applied to the upfront analysis and design of age uncertainty throughout the design process. These margins canthe system architecture. DOCK TO DOCK EFFICIENCY RELIABILITY HAS A NAME.ITS KOHLER. Since 1922, captains, mariners and seafarers all over the worldFor global support please have trusted KOHLER marinecontact John McKinnon at generators to power their770-601-6880 or boats. When it comes to marineJohn.McKinnon@kohler.comOur waterjets representpower you can count on, count the pinnacle of all-roundon Kohler.operational efficiency, agilemanoeuvrability, for swift turnarounds, and durability.www.hamiltonjet.com17 APRIL 2023'