Question: is a passport required on a cruise ship?
Answer: Passports. If you're British or Irish, you'll need a full 10-year passport (5 years for infants or 3 years for Irish infants up to 3 years of age). Most cruise lines recommend that the expiry date is valid at least 6 months before your return date – with some cruise lines (such as Cunard) noting this to be mandatory.