mainland was called Čukarica Arm (Чукарички рукавац). Serbian Shipping Society, which was founded in 1890, decided to use the arm as the zimovnik, or winter shelter for ships and boats. Upstream from Čukarica, at the time suburban village of Belgrade, the Society dammed the arm with slanted, shackled, thick triangular piles, called pilotne. Facing the stream, they stopped the ice which would then elevate itself slab by slab until it reaches over the top of the piles and breaks into pieces. The stream would then take smaller pieces next to the docked ships. In the case of complete freezing of the river, the tugboats were deployed, with crew members being armed with axes, grappling hooks and dynamite. As the Society built and kept zimovnik on its own, without state help, they charged the use of the object. In the arm's central section, on Čukarica bank, the first shipbuilding facility in Serbia was opened. Though the engines had to be acquired abroad, the shipyard was producing smaller and medium-sized steamboats. Known as the Čukarica Shipyard (Čukarička brodarnica), it also repaired all Serbian ships and continuously produced iron-made barges of all kinds and sizes for Serbian and Bulgarian markets. When Ada was connected to the mainland via the embankments in 1967, northern section of the arm was transformed into the Čukarica Bay (Чукарички залив), though the previous name survived, too. The arm is elongated in the southwest-northeast direction, bounded by the northern tip of Ada Ciganlija, the embankment and the right bank of the Sava (neighborhoods of Careva Ćuprija and southern stretch of Bara Venecija, formerly known as Šest Topola). This is where the Topčiderka river flows into the Sava. Near the connection point with the main flow of the Sava, the bay is today crossed by the Ada Bridge. The bay is used for the sports and leisure activities as the kayaking clubs were located in it, so as the marina for small boats, while the banks are encircled with the bicycle paths. The bay is long and wide. Surface of the bay itself is , but the area which city administration included in the bay locality includes and additional of aquatorium and of the surrounding land. In March 2018 city announced an urban design competition for the adaptation of the total bay area (). The forested area on the mainland, at the entrance into the bay, administratively belongs to the