Yes, Facebook Messenger works on cruise ships, but its functionality depends entirely on the type of internet package you purchase. In 2026, most major cruise lines like Royal Caribbean, Carnival, and Norwegian have upgraded their fleets to high-speed Starlink maritime internet, which allows for seamless text messaging, photo sharing, and even video calls. If you buy a full "Wi-Fi" or "Premium" package, Messenger will behave exactly as it does on land. However, if you only purchase a "Social" or "Value" package, you may be restricted to text only, with video calls and large file transfers blocked to save bandwidth. Some cruise lines also offer a "Social Pass" specifically for apps like Messenger, WhatsApp, and Instagram. If you do not buy a package at all, Messenger will not work unless you are in a port and using local cellular roaming or free port Wi-Fi. It is important to put your phone in Airplane Mode and then turn on Wi-Fi once on board to avoid massive "At Sea" cellular roaming charges while using the app to stay in touch with family.