Carnival Cruise Line actually has a system of leaving notifications on pool and sun-deck chairs designed to warn passengers. It works when it's used, but it's not always used, even on very busy ships.

Carnival Cruise Line's fourth and fifth Excel-class ships will be called Carnival Festivale and Carnival Tropicale.

Carnival Cruise Line announced Sunday details on new ships including its next sister ship to Carnival’s Mardi Gras coming to ...