First time cruiser and I’m stressing about required travel documentation. We are cruising to Cozumel, George Town (Grand Cayman), and Falmouth, Jamaica in April 2019 aboard Liberty of the Seas. Embarking and deparking from Galveston, Texas. So I understand this is considered a “closed loop” cruise. However I find a definite answer whether or not passports are required. For closed loop cruises, generally speaking it states a valid I.D. and birth certificate is sufficient, however it says to check with each specific port. So my question is: does Cozumel, Grand Cayman, or Jamaica require a passport even if I’m on a closed loop cruise? Thanks for the help!