Late dining is usually assigned to 8:00 AM breakfast on debarkation day. You have to be out of your stateroom by 8:00 AM. You can leave the ship at any time after the ship has been cleared. If you go to the dining room breakfast, you will probably be done with breakfast at about 8:30-8:40, you will then be asked to join the line to leave the ship. If you want to get off earlier, go to the buffet at Cabanas then leave at your leisure.