Does the eSIM work on the Cruise Ship while we are at sea?

Important distinction: No. Standard mobile eSIMs rely on land-based towers. When your ship is sailing in the middle of the ocean, you are out of range of these towers. However, the eSIM will work perfectly as soon as the ship docks at the port in Nassau, Freeport, or gets close to the islands. It is the best way to avoid the cruise line's expensive satellite Wi-Fi packages while you are exploring the ports.