Strait of Hormuz: It separates Iran and Oman linking the Persian Gulf to the Gulf of Oman and the Arabian Sea. The Strait is 33 km wide at its narrowest point. The shipping lane is just three km wide in either direction. Most crude exported from OPEC countries is shipped through this waterway. Strait of Bosporus: It connects the Black Sea with the Sea of Marmara. It forms part of the continental boundary between Europe and Asia. It divides Turkey by separating Anatolia from Thrace. Strait of Gibraltar: It is a narrow strait that connects the Atlantic Ocean to the Mediterranean Sea. It separates the Iberian Peninsula in Europe from Morocco in Africa .