These are the ABET-accredited ocean engineering programs:
Florida Atlantic University
All are bachelor’s degree programs except for the one at University of Hawaii at Manoa, which is a master’s degree program. Its admission page at http://www.soest.hawaii.edu/ore/OE/ore_admission.htm says:
University of Hawaii at Manoa:
Students are admitted for graduate study on the basis of their scholastic records. Degree candidates for the MS program usually have a bachelor’s degree in an engineering discipline that provides an adequate background in mathematics, physics, chemistry, and mechanics. Students seeking admission to the PhD program should have an MS in engineering or equivalent qualification. However, exceptionally well-qualified students with a BS in engineering, who do not have a master’s degree, may petition to be admitted to the PhD program directly. Students with mathematics, physics or other science backgrounds may be admitted to the program, but are required to take specific undergraduate engineering courses to satisfy the pre-program requirements as outlined in Coursework Requirements under Academic Program.