drron, if you don't mind a bit of a tangent.
If you do a long, say RTW cruise, and a pax needs a visa for, say 5 of the countries, is it up to them to get their visa beforehand in the normal way (as if they were flying there)? Or are cruise ship pax given a 'special process' where visas are granted to those that need them on arrival, on board the ship?
In either case, do you need to register your visa (in the first case ) or need for a vias (second case) with the vessel before sailing?