Wifi extenders.

[mjcoon]

I think there may be a fundamental limitation. If you are at a location that is at the extreme range of shore-based wi-fi, that means that the signal-to-noise ratio is already bad. You can only make minor improvements on that from the receiver side. The real solution is to position an extender somewhere where the signal is better and relay from there. But you are still sharing out the available bandwidth. That is why most of the preferred solutions are to use the much longer-range mobile signal and ignore the shore wi-fi.

 

[biscuit]

Muama Ryoko with eg: Lebara or Flexiroam sim. 9 x 6 x1.5 cm. Can be put in poly bag and raise up mast if needed.
Worked well for years on W Cost Scotland wherever 3/4 G signal available. Can take on continental holidays too.