Mare clausum defended a "Mare clausum" policy during the age of discovery. This was soon challenged by other European nations. From 30 BC to 117 AD the Roman Empire came to surround the Mediterranean by controlling most of its coasts. Romans started then to name this sea "mare nostrum" (Latin for "our sea"). At those times the period between November and March was considered the most dangerous for navigation, so it was declared ""mare clausum"" (closed sea), although bans on navigation were probably never enforced. In classical law the ocean was not territorial. However, since the Middle Ages maritime republics like the
Air Nostrum Air Nostrum and CityJet of Ireland announced they would merge to form the largest regional airline in Europe, however will remain as separate brands. As of December 2018, the Air Nostrum fleet consists of the following aircraft: Air Nostrum Air Nostrum, legally incorporated as "Air Nostrum, Líneas Aéreas del Mediterráneo, S.A.", is a Spanish regional airline based in Valencia. Air Nostrum is an independent carrier. It currently operates as a franchisee of Iberia as Iberia Regional and an affiliate member of the Oneworld airline alliance. Air Nostrum operates 91 domestic and international routes to 51 destinations, and charter flights. Its