Two Carnival Cruise Line passengers missed their cruise because of a traffic accident on the way to the port. [Carnival Cruise Line FAQs]If your name is not on that list at that time, the cruise line has no choice but to deny you boarding the ship. Related: How fake Carnival Cruise Line customer service is scamming passengersHow to avoid losing your cruise dollars if you miss the shipIn the past 10 years, I have responded to hundreds, maybe even thousands, of emails from cruise ship passengers who missed the boat. Consider buying the cruise line’s travel protectionNow to Heald’s number one piece of advice for the cruise ship passengers: purchase travel protection from Carnival. (Michelle Couch-Friedman, Founder of Consumer Rescue)Before you go: 2 more cruise ship passengers say they were scammed in Nassau.