Strait of Gibraltar These "internal waves" continue to flow eastward and to refract around coastal features. They can sometimes be traced for as much as , and sometimes create interference patterns with refracted waves. Except for its far eastern end, the Strait lies within the territorial waters of Spain and Morocco. The United Kingdom claims around Gibraltar on the northern side of the Strait, putting part of it inside British territorial waters. As this is less than the maximum, it means, according to the British claim, that part of the Strait lies in international waters. The ownership of Gibraltar and its territorial waters
Gibraltar South Mole Lighthouse round, white tower, 56 feet in height. The Gibraltar "A" Head Lighthouse continues to be active and is utilised as an aid to navigation, in and near the harbour. Its light characteristic is a flashing white light, with one flash every two seconds, and the range is fifteen nautical miles. The operational lighthouse has a focal plane of 18 metres (60 feet). The lighthouse tower and the site are both closed to the public. The South Mole Lighthouse is operated by the Gibraltar Port Authority. The United Kingdom Hydrographic Office Admiralty number for the lighthouse, which originates from Volume D