If you study maritime engineering, you start with two years of study at AUT and then transfer to the AMC in Tasmania for your final two years. You then specialise in marine and offshore engineering, naval architecture or ocean engineering. There is no other programme of this kind in New Zealand.
Maritime majors are only open to New Zealand citizens. Students are subject to Australian visa and fee requirements depending on their citizenship and residency status. New Zealand citizens are entitled to study in Australia on the same basis as Australian permanent residents. Most New Zealand citizens are eligible for student loans through StudyLink but you should check your eligibility with StudyLink.
Australian Maritime College website