on board that cruise ship. the ship is on the move at this house. 300 passengers have been kept on board. what they have to do or they won't let them off. abc's victor oquendo again tonight. >> reporter: tonight, we're learning the 300 passengers and crew aboard the freewinds cruise ship will remain quarantined when they arrive at the ship's home port on the island of curacao. curacao's ministry of health telling abc news -- "all of our efforts are geared toward trying to avoid any further spread of disease." everyone on board has been stuck on the ship since arriving in st. lucia tuesday when a doctor confirmed a single case of measles. the freewinds shown here in a promotional video is reportedly owned by the church of scientology and used for religious retreats and advanced spiritual counseling. that ship now hours away from curacao. health officials say when it will arrive they will board and assess who was vaccinated or needs to be beforehand and those may be allowed to disembark. if all goes well, that ship