
by using his built in cellular device, you should be able to play multilpayer. put up a LAN with 4 clients + server on a boat and (only) the server hast internetconnection, e.g. Basically from what i saw from all my traffic, this should work with minimal internet connectivity (like GPRS) and should even work if the clients have no internet access, but only the server. That's very few traffic volume and not time critical (at least not in matter of ping times, of course the requests will timeout at some time). The server in opposite only verifies the logindata of players via internet.

If playing in LAN, THIS connection part is way faster than 3G.

The connection speed between clients and server should be at least at 3G-speed.
