Yes, cruise ships employ a security screening process that is remarkably similar to airport protocols, and they will thoroughly go through your bags—both carry-on and checked—before you are allowed to board. Every piece of luggage is passed through an X-ray machine to scan for prohibited items such as weapons, explosives, illegal drugs, and high-heat appliances like irons or hot plates which pose a significant fire risk at sea. Furthermore, cruise lines are particularly vigilant about "bootlegged" alcohol; security teams specifically look for the density and shape of bottles that might indicate a passenger is trying to bypass the ship's bar revenue. If a suspicious item is detected during the X-ray scan, security personnel have the authority to physically open and inspect the bag, often in the presence of the passenger at a designated "naughty room" or security desk. In 2026, many major lines also utilize narcotics-detection dogs at the terminal as an additional layer of security. This rigorous screening ensures the safety of the thousands of passengers and crew members confined to the vessel and helps the cruise line enforce its strict on-board policies and international maritime safety regulations.