Thanks for all the info!
If you have booked a yacht/sailing boat in the Adriatic sea, we offer affordable transfers to marinas/islands. More at Taxi boat Split to Hvar
Be sure you are aware of the complexities of a "Schengen visa" and the time limits.
Also that be aware different limits apply to boats and people.
As countries are computerising the clearance procedures more and more have an easy way to identify overstayers.
Penalties can be draconian.
I'm a UK yachtsman and would be very happy to help you if I can,