The Photo ID Needed to Board a Cruise Ship
by Carol Luther, Demand Media
Your cruise line can require a passport for boarding.
When you book a cruise from the United States to a foreign destination, your cruise line will tell you what type of photo ID you need to board the vessel. The qualifying identification depends on the type of voyage, the ports of call on the itinerary and federal regulations for U.S. entry. Your cruise line must verify that you have these documents before allowing you to board the ship