in 2014. In an analysis of the SAF humanitarian response to Typhoon Haiyan in 2013, Defence Minister Ng Eng Hen noted that the disruption of communications on the ground underscored the need for a platform which could provide "centralised ability for command and control" in the air. The RSN celebrated its 50th anniversary in 2017 and hosted an international fleet review, with twenty nations participating. In October 2018, Malaysia extended its Johor Bahru port limits past its 1979 maritime claims into waters off the reclaimed Tuas sector which Singapore claims as its own. Singapore responded by extending its port limits to overlap with Malaysia's new port limits. As Malaysia deployed elements of the Malaysia Coast Guard and government ships to enforce their claims, the RSN's littoral mission vessels were stationed on location 24/7 with the Police Coast Guard. Both side eventually suspended the overlapping port limits and withdrew from the area following successful negotiations. The Navy underwent a comprehensive restructuring in June 2020 which dissolved all the existing squadrons, reorganizing each class of ship into its separate flotilla. The Maritime Security Task Force was restructured, with the newly created Sea Security Group and Force Protection Group placed under it. Future procurement plans The Navy launched its first newly built Invincible-class submarine in 2019, with the second and third submarines RSS Impeccable and RSS Illustrious launched on 13 December 2022. All three submarines will be expected to be commissioned in 2023, with an operationalization date set for 2024. The last submarine RSS Inimitable remains in construction. Procurement plans are in process for a multi-role combat vessel (MRCV) and joint multi mission ship (JMSS). The MRCV will act as a 'mothership' for unmanned assets and host mine-countermeasure Venus 16 USVs, while the JMSS will increase the RSN's aviation capabilities in supporting disaster relief operations. A new class of patrol vessels to operate alongside the existing littoral mission vessels are to enter service in 2026. Organisation Command structure The Republic of Singapore Navy is led by the Chief of Navy (CNV), who reports directly to the Chief of Defence Force (CDF). The CNV is responsible for the RSN's overall operational capabilities and administration. The organisational chart shows the peacetime administrative chain of command with five formations: the Fleet, Maritime Security Command, Naval Logistics Command, Naval Diving Unit, and the Maritime Training and Doctrine Command. The current Chief of Navy is Rear Admiral Aaron