What classes are good to take in high school if you want to work on a cruise ship after graduation?

My younger brother is taking an ROP stage craft class and wants to work for the performance people on the Norweigan cruise liners. What other classes would you suggest he take for his last year next year? I suggested taking the ROP culinary class, because you get to take the Serv Safe certification test for free. Any other suggestions would be extremely helpful. Also, how can he go about contacting them in finding a job? Thanks to all who answer.