Answer 1

I work on a vessel and for the maximum range, I use Poynting antennas, we usually sit in a stationary position for long periods of time so I can aim these directional antennas at the shore and the maximum working range I've found is around 50KM offshore.

here is the link to the antennas I use if you are interested.

https://poynting.tech/antennas/xpol-2-5g/

Answer 2

I would suggest you use Yagi antenna