If it's a chinese cruise ship I don't think they will hire foreigners unless they say so. Hainan airlines was one of the airlines that had started to do recruit foreigners to work on their airlines at least a year ago. I went to the interview there myself and got a nice little model plane and got to talk to the people in charge. So I would say only if the cruise ship company is looking for foreigners to work on their cruise ship. They need people in their own country to work and have a good life first because your able to go back to your country  and get a job.