Mavi Koy
Island
Hasır Adası
Hasır Adası is one of the OpenStreetMap island records on the Marmara coast. Mavi Koy shows this point for cultural and geographic discovery, not nautical navigation, depth, anchoring, or safety advice.
Audio note
Hasır Adası is an open-data coastal point in Mavi Koy's Marmara coast layer. The aim is not to draw a route; it is to hear coastal names, islands, beaches, capes, and sea-visible geography inside a safe cultural atlas.
Mavi Koy is for cultural and geographic discovery. It is not nautical navigation, depth, weather, anchoring, or safety guidance.