In `your final documentation package, you will receive contact information for all accomodations on the trip, including the ships. In addition, with a copy to give your family. The GCT office will also be able to contact the ship. You can also call from the ship, but it is not cheap and internet access is available.
We have had fellow travelers informed of emergencies at home, but have not had to be contacted, fortunatley. If an emergency requires that you leave the trip. The program director will assist you