I don't think I've ever seen this yet on a SA-MP server, but technically we could add cargo ships slowly moving around the state, like at a rate of "across the map once per entire gameweek"? I don't think the San Andreas Sound is fully navigable for them though due to the low-set Frederick Bridge, but random directions around the edges of the map should be okay. And maybe into the Easter Basin / Ocean Docks ? Potentially even take an already existing ship and make it sail away every once in a while? too laggy, ikr
Technically, it will work as a map consisting of an object group being bulk-moved in a straight line from A to B over the 7 game days.
This will add ambience. It's boring seeing the exact same ships in exactly the same places for over 20 years...