1. Black Sea, Turkey, Si̇nop and approaches Yale Public content 1992. 2011-12-07T19:09:59Z. 2015-10-21T15:07:22Z. United States. Defense Mapping Agency. Hydrographic/Topographic Center. The Center ; USGS Branch of Distribution, Box 25286, distributor. English. Public. Black Sea, Turkey, and Sinop.