One of the buses that shuttle passengers between Molo Beverello (where you'll find
hydrofoils to Ischia, Capri, Procida, Sorrento etc, as well as the cruiseship terminal)
and the other quay further round the harbour, at the Porta di Massa - used by the
ferry ships which carry cars, coaches, lorries etc to Ischia, Capri and Procida....
Note that not all of the buses are decorated in quite the same way - and several have
just the standard 'Di Sarno' company logo..