You are still going to have to get through all your courses that are USCG/STCW required (will get you ready for the license exam as well. Alot of that will be pretty basic but you do need your celestial nav to get your license for oceans) plus some that you just need re: Naval Arc (but this is stability). Really, as far a math skills go - please bone up on your algebra - seriously, that’s as complicated as it gets but in my experience there were a whole lot of students that did not know algebra and really really struggled with stability and cel nav (and terrestrial nav too).