Recent research conducted in the & Idot;n & ouml;n & uuml; Cave, located on the coast in northwestern T & uuml;rkiye, has revealed significant findings regarding human traces from the Chalcolithic Age. The gold, stone, bone ornaments and tools found in the cave, along with other artifacts, have shown that & Idot;n & ouml;n & uuml; Cave is linked to the coastal cultures of Eastern Europe. This situation highlights the cultural interaction developing between the western and southern shores of the Black Sea. This cultural interaction provides clues to the social interaction and shared technological development that occurred thanks to maritime trade. In these early periods when the sea began to be used for the transfer of raw materials or finished products, the existence of short-distance commercial activity along the western shores of the Black Sea is already known. Ivanova has drawn attention to this topic with a very comprehensive perspective. The findings discovered and presented during the & Idot;n & ouml;n & uuml; Cave Excavations, which began afterward, have proven that the area of activity of the maritime trade was broader than previously thought, encompassing the Anatolian coasts as well. This article examines the relationship between the inhabitants of & Idot;n & ouml;n & uuml; Cave and the coast and sea, and the impact of these relationships on the findings from & Idot;n & ouml;n & uuml; Cave.