The Dardanelles (; (トルコ語:Çanakkale Boğazı), (ギリシア語:Δαρδανέλλια, ''Dardanellia'')), formerly known as Hellespont
(; , ''Hellespontos'', literally "Sea of Helle"), is a narrow strait in northwestern Turkey connecting the Aegean Sea to the Sea of Marmara. It is one of the Turkish Straits, along with its counterpart, the Bosphorus. It is located at approximately . The strait is long but only wide, averaging deep with a maximum depth of .〔Nautical Chart at GeoHack-Dardanelles, Map Tech〕 Water flows in both directions along the strait, from the Sea of Marmara to the Aegean via a surface current and in the opposite direction via an undercurrent.
Like the Bosphorus, it separates Europe (the Gallipoli peninsula) from the mainland of Asia (Anatolia). The strait is an international waterway, and together with the Sea of Marmara and the Bosporus, the Dardanelles connects the Black Sea to the Mediterranean Sea.
The Çanakkale Suspension Bridge has been planned, connecting Sarıçay (a district of Çanakkale Province) on the Asian side to Kilitbahir on the European side. This is the narrowest part of the strait.〔http://www.botek.info/detay_motor_12.html〕
The Turkish name ''Çanakkale Boğazı'' is derived from the major city adjoining the strait, Çanakkale (which takes its name from its famous castles; ''kale'' means "castle").
The name ''Dardanelles'' derives from Dardanus, an ancient city on the Asian shore of the strait which in turn takes its name from Dardanus, the mythical son of Zeus and Electra.
The Greek name (''Hellespontos'') means "Sea of Helle", and was the ancient name of the narrow strait. It was variously named in classical literature ''Hellespontium Pelagus'', ''Rectum Hellesponticum'', and ''Fretum Hellesponticum''. It was so called from Helle, the daughter of Athamas, who was drowned here in the mythology of the Golden Fleece.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』