We all want robust installed systems. I strongly recommend the Rogue Wave, have used it for some time now. Check the original review story here, and a recent update regarding the improved antenna base here.

Hi Simon

Currently sitting on board on the Hamble River and logged into the Universal Marina 's wifi Spark ( free so far). More importantly, using an Alfa system from Crucial Wifi. Antenna, adapter and router all for £90. So far so good.
Excellent service and advice from Crucial Wifi.

Peter

Hi All
we are in the immediate market for WiFi antenna and on board router. I note this thread is now over five years old. Does anyone have any updateson equipment recommendations?
We spent the past two seasons in Spain and Portugal. With the sole exception of RCN Vigo, reception in marinas was non-existent - forget about when at anchor. We both resorted to using mobile data via our smartphones.
Any advice will be most appreciated.
thanks in advance
Alex

Alex
We fitted a Digital Yachts WL510 a get years ago which works well for us. Not sure if they still make this model but it’s a good piece of kit.
Simon