From the Palm Beach Post:
About a dozen senior members of the crew of the beleaguered Palm Beach Princess [cruise ship] were fired Saturday, ...
...
The crew is mostly made up of foreign nationals who have work visas that do not allow them on U.S. soil. Those fired were escorted off the ship into waiting vans by U.S. Customs and Border Protection officers.
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Some of those crew members, most of whom spoke to the Palm Beach Post on the condition that their full names not be used, said they feared that the ship would set sail for the Bahamas and dump them there, outside of the protections of U.S. labor law and stranding them without a paid way home.
As best I can figure out from some web searches, the article is referring to a C-1/D visa, but I'm not completely sure about this. For those who want to test their GATS skills, try to identify all of the various service supply modes that apply to Americans/non-Americans performing services to Americans/non-Americans on an American-owned/non-American-owned cruise ship. For extra credit, think about how the situation might change as the boat travels from the U.S. to the Bahamas.