Sorry I was not clear enough. Projects like Serval Mesh not only are useful when something bad happens in the communication system, but also when companies, like cruiser companies, want to stop you from communicating with a reasonable price. So if a family of N members want to communicate using phones inside of a cruiser, the phones will all connect to the GSM cell in the ship itself, that costs like a lot of money per minute in roaming fees. However there is a wifi network in the ship (also super costly) that Serval Mesh is able to use in order to let your family communicate free of charge (you don't need to really access the internet service provided via wifi, just to connect to the open/free internal wifi network).
