Détroits
The Turkish Directorate General of Coastal Safety operates 11 ETVs along with numerous SAR, oil spill response and fire fighting vessels at Bosphorus and Dardanelles, where the organization has a "de jure" monopoly for marine salvage along with the Sea of Marmara. Some of these ETVs also serve as escort tugs for vessels passing through Bosphorus and Dardanelles, which make up the Turkish Straits System, one of the busiest and dangerous seaways all around the world. The organisation also deals with navigational aids all around Turkey, SAR, pilotage at both straits and some other Turkish ports and most importantly Turkish Straits Vessel Traffic Systems.