We have their predessor to their MWB 200. It comes more self-contained and complete. We located the antenna/receiver in the seahood, then ran their service cable to router. We then have independent WIFI at multiple wired locations on the boat. It works fine for us. PortNetworks made the service cable a bit longer for us and provided an extension for the antenna do that we could work-out the mehanics in the seahood. PortNetworks have been very helpful when I've had to ask them about configuration changes (from various "upgrades" and systems changes.

If you want to go to the trouble of locating an antenna higher (like at one of the spreaders), then you could with the their MWB 250.

http://www.portnetworks.com/p/products.html