coastal patrol crafts. They were gradually replaced by the patrol vessels built locally by ST Marine to replace the aging coastal patrol craft, with all ships in commission by August 1989. The first six vessels of the Fearless class were armed for anti-submarine warfare missions and placed under the Fleet as 189 Squadron, with the remaining six being allocated to 182 Squadron under Coastal Command. was badly damaged in a collision with a container ship in the Singapore Strait in January 2003 and removed from service. 189 Squadron was subsequently transferred to Coastal Command in January 2005, placing all eleven ships under the same formation; the anti-submarine suite was also gradually removed as the RSN refocused its ASW capability on other platforms. The eleven patrol vessels formed the combined 182/189 Squadron until May 2016 when the first Independence-class littoral mission vessel completed its sea trials; 189 Squadron was subsequently subsumed into 182 Squadron. On 11 December 2020, the final two patrol vessels RSS Gallant and RSS Freedom were decommissioned. Four vessels of the class were converted into Sentinel-class maritime security and response vessels. Bases Tuas Naval Base Tuas Naval Base (TNB) is located at the western tip of Singapore and occupies 0.28 km2 (0.11 mi2) of land. It was officially opened on 2 September 1994 by Prime Minister Goh Chok Tong. For about two decades, Brani Naval Base was the RSN's only base. An expansion of the fleet in the early 1980s meant that more space was needed for the fleet and its shore infrastructure. However, this was not possible as the land around Brani was reserved for use by the port authority to develop container facilities. As a result, Tuas was selected as the site for a new naval base. Better utilisation of space at TNB resulted in two and a half times more berthing space than Brani, even though TNB only has a shoreline of 850 m (0.5 mi). Provision was also made for recreational facilities. Automation was incorporated into the design of TNB to reduce manpower requirements, such as mechanical ramps for the loading and unloading of vehicles and an automatic storage and retrieval system. It also has a floating dock which can lift 600 tonnes and transfer a ship from sea to land to facilitate repairs and maintenance. The base has since been enclosed to the west by land reclamation in Tuas South. The missile corvettes,