The Bosphorus is a passage about 30 kilometers long where the Marmara Sea and the Black Sea join to each other. The depth of the Bosphorus, which is determined to have fashioned 7 thousand years ago, is 60 and the deepest is about one hundred – 120 meters. The width is very variable and the widest region is 3 thousand 500 meters. The narrowest section is around Rumeli Hisari and is about 760 meters. The length of the coasts differs between the European and Asian sides. The European coast which is more indented is fifty-five km. While the Asian coastline is 35 km long.
Due to the truth that the Black Sea is the solely way to join the Black Sea to the open seas, the Bosphorus has an extremely good geopolitical and financial importance in all a while of records and consequently continues to characterize as a water route that international locations prefer to control. The Bosphorus is nevertheless the only gateway to the Black Sea coast, with the coasts of the Marmara, Aegean, Mediterranean and in the end the ocean. That is why every year thousands of commercial ships and tankers carry more than a few loads, such as hazardous materials such as crude oil and LPG, via the Istanbul Bosphorus. International use of the Bosphorus on marine transportation is regulated by using the Montreux Straits Convention, which was once signed on 20 July 1936.
At the identical time, the Bosphorus separates Europe from Asia. The first connection between the two continents was once established in 1973 with the Bosphorus Bridge (Now, the name of the bridge is 15 Temmuz Şehitler Bridge). Fatih Sultan Mehmet Bridge, the 2nd bridge of the Bosphorus, entered provider in 1988 and related Europe with Asia for the 2d time. In 2017, the third bridge of the Bosphorus, Yavuz Sultan Selim Bridge, entered service.