Whether you should bring your physical passport on a shore excursion is a common debate among cruisers, and the answer often depends on the specific port and your risk tolerance. Most cruise experts and cruise lines recommend leaving your original passport in your stateroom safe and instead carrying a high-quality color photocopy or a digital photo of it on your phone, along with a government-issued photo ID like a driver's license. This minimizes the risk of losing your most vital document or having it stolen while exploring. However, you must carry your original passport if the local government specifically requires it for entry (which your cruise director will announce) or if you are planning to travel far from the port on an independent excursion where you might miss the ship's departure. In the rare event that you miss the ship or have a medical emergency, having your original passport on your person makes arranging international travel much easier. Ultimately, always check the "Daily Program" provided on board for the specific requirements of each destination.