You can use your mobile services onboard maritime vessels while the ship is at sea. When you make a call, send an SMS or use data services you will be charged the Roaming rate for the zone of Maritime (Other [Sat , Aero & Marine]). Once the ship reaches port, you can connect to the local network at which point you will be charged the Roaming rate for the country you are in. To find which cruise can you use your mobile, you may access www.mcp.com; www.cellularatsea.com; www.siminn.co.uk and www.seanet.se.