NTNU offer a two-year master program in Subsea technology: http://www.ntnu.no/studier/miuvt
It is possible to specialize in RAMS as part of the study program. The following presentation gives brief introduction to RAMS a as part of the Subsea technology master program:
http://frigg.ivt.ntnu.no/ross/rams/2015-RAMS-in-the-Subsea-Technology-master-program.pdf