 These seven were narrowed down to three based on each tender's merit, competitiveness with the other tenders, and successful meeting of Australian industry involvement targets for both construction and long-term support.Austal and Defence Maritime Services (DMS) partnered to offer twelve ships based on an expanded version of the latter's , in use with the Australian Customs Service.The companies submitted two proposals for a vessel, one with a steel hull, and one with an aluminium hull; the latter offering a 21% reduction in fuel consumption.