I'll second the Bullet, as long as you have some clue about programming wifi units and/or money
is tight. The Rogue is a Bullet plus antenna
, but has customized firmware that makes it easier for non-techies to use as a client, at more than double the price
. Depending on the user either can be the best answer.
Ubiquiti Bullets are readily available online, and often at local wifi specialists. The best model to get for marine
use is the relatively new Bullet Titanium, as it has a much better system for sealing the ethernet cable entry. The version you will want is the M2HP.
If you go with the Bullet you will have to arrange for the external ethernet cable (preferably shielded) and POE insertion device, along with a power supply. And you will need to find a 12dB antenna
. Ask and I will get a source for the antenna.