I am using a Ubiquiti Bullet with good results. I have it connected to an Asus Travel router (ASUS WL-330N3G 6-in-1 Wireless-N Mobile Router, world's smallest multi-role device) all running on 12 volt
power. Uses very little juice. This gives me a
boat wide wifi
network for all the phones and computers/tablets. I can even pick up the router at the Tiki Bar 100 yards away from the
boat. I also have a Ubiquiti Nanostation M which is supposed to pick up weaker signals from farther away. The Bullet beats it hands down. I have the Titanium version of the Bullet for supposed greater
weather protection, but I don't think it is really worth the extra
money except under extreme conditions. Very easy setup. Lots of information on the net. No USB wires to worry with.