Brač Island also has interesting leftovers from ex Yugoslavian army. There are underground docks for submarines and battleships.
The docks are usually nicely masked with rocks with artificial rocks. You can dock there with larger sailboats and even go into the underground dock on foot or with your dinghy. The depth in the dock is usually about 5-6 meters. And it is about 8 meters wide.
The sailboat on the photo is Bavaria 36.