Air and maritime transport is developing in Georgia, with the former mainly used by passengers and the latter for transport of freight. Georgia currently has four international airports, the largest of which is by far Tbilisi International Airport, hub for Georgian Airways, which offers connections to many large European cities. Other airports in the country are largely underdeveloped or lack scheduled traffic, although, as of late, efforts have been made to solve both these problems. There are a number of seaports along Georgia's Black Sea coast, the largest and most busy of which is the Port of Batumi; whilst the town is itself a seaside resort, the port is a major cargo terminal in the Caucasus and is often used by neighbouring Azerbaijan as a transit point for making energy deliveries to Europe. Scheduled and chartered passenger ferry services link Georgia with Bulgaria, Romania, Turkey and Ukraine.