Turkish Straits: the Bosphorus and the Dardanelles – March 9th, 201140.6N 28.2E
Various straits and seas can be observed in this image of Turkey. In the upper left corner is the Black Sea, connected to the Sea of Marmara (center) by the Bosphorus Strait. Visible on either side of the Bosphorus is the city of Istanbul.
To the west, the Sea of Marmara is connected to the Aegean Sea by the Dardanelles. The strait is 61 kilometres (38 mi) long but only 1.2 to 6 kilometres (0.75 to 4 mi) wide, averaging 55 metres (180 ft) deep with a maximum depth of 82 metres (300 ft). 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.