Can secondary vocational school students work on cruise ships?

This should have no academic qualifications. Don't make things too complicated.

This kind of cruise ship generally has only two requirements:

1, whether the professional knowledge can meet the professional needs;

2. Language ability (not required in some occupations, mainly English and Chinese).

In addition, it should be your physical condition, which is the requirement of all enterprises and the requirement of the state for on-the-job personnel. It must be someone who needs good health and no disease. As for the altitude, I'm not sure, because this should be selected according to different cruise requirements. You can consult international maritime affairs in this regard, which should give you a good answer.