If you've never been on a cruise and wonder what's there to do on a ship, here's a glimpse of what there's all to do aboard a Royal Caribbean Cruise. We boarded an 11-night Southern Caribbean Cruise from April 9 to April 20. Every day we were given a newsletter of activities and things to do on the ship. They call it the "Cruise Compass". Learn more about the Headliners and Entertainment while on this cruise.