IMHO, you would be much better off going to the best name brand MBA program that you can get into.
In any management program, half of the program will be graduate 501 level introductory courses in accounting, finance, marketing, HR, managerial economics, operations research, etc. (courses like managerial econ and operations research require calculus, as do some finance courses).
An MBA is well understood by employers and has more value in the managerial job market than a MS. Even though, there is not a dime’s worth of difference between the two degrees.
The perceived quality of the school and the size of its alumni base are very important factors. A MBA from a top 25 school like Harvard or NYU is many times more valuable than a MBA from a backwater school.
You already have maritime covered with your undergrad degree and work experience.
You can probably get a pretty good shoreside managerial job with a NYC/Stamford area shipping company right now.
Would an MS from SUNY be an advantage? Sure, but not as much as you think. Would it be worth two years of lost income and tuition? I doubt it.
The customary MBA track is undergrad, two or three years of managerial work experience, and then grad school.
You might consider getting a managerial job with a shipping company now, and doing an Executive MBA program at night.