I've had a look and have several objections (by comparison) to the Surf:
It's got a brick. Unless that 12V were tolerant of house (10-15V) it would require an
inverter to run.
It's relatively (albeit WAY higher than, say, a household router, at ~70mw) weaker than the currently (regulated to no more than that) common 1000mw.
It's
interior rated. Either you'd have to come up with some means of enclosure, or be limited to having it inside.
It's got a 5bdi rubber duck
antenna. Great for short range, as the band is very fat, and motion would be of no issue. However, it doesn't have the guts, in or out, to go very far.
It does use a cat5 cable, so you could have it connected to a router rather than just a
single computer. Note that their other, on the right side of the three columns, uses POE, and a weatherproof box, but is a directional
antenna, useful only in fixed locations. That's a common means of doing straight-line, line-of-sight, comms between two
remote stations, but not useful for cruisers, typically.
L8R
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PS Moderators, my apologies for forgetting my sig stuff. If I knew how, I'd go back and edit out the offensive extra lines!