The port of Naples runs several public ferry, hydrofoil and SWATH catamaran services, linking numerous locations in both the Neapolitan province, including Capri, Ischia and Sorrento, and the Salernitan province, including Salerno, Positano and Amalfi. Services are also available to destinations further afield, such as Sicily, Sardinia, Ponza and the Aeolian Islands. The port serves over 6 million local passengers annually, plus a further 1 million international cruise ship passengers. A regional hydrofoil transport service, the Metropolitana del Mare, runs annually from July to September, maintained by a consortium of shipowners and local administrations.