056 corvettes joined the BN in 2016 while two more were ordered in July 2015 and they are awaiting commissioning. Two large patrol craft (LPCs) were built in China and joined the BN in 2013. Two more ships of the same class with dedicated ASW capabilities were commissioned in 2017. Five Padma-class patrol vessels have been commissioned into the navy in 2013. Besides, multiple indigenous built LCUs and LCTs have been added to the navy. The Bangladesh Navy opened its aviation wing on 14 July 2011 with the induction of two AgustaWestland AW109 helicopters. Later on, two Dornier 228NG MPA were introduced in 2013. To attain underwater operational capabilities, the Bangladesh Navy inducted two off-the-shelf Type 035G (Ming class) submarines from China on 12 March 2017. A new base for the Bangladesh Navy, named BNS Sher-e-Bangla, is being constructed at Rabanabad in Patuakhali. It will be the largest naval base of the Bangladesh Navy with submarine berthing and aviation facilities. Meanwhile, a separate submarine base, named BNS Sheikh Hasina, is under construction at Pekua in Cox's Bazar. A full-fledged naval base, named BNS Sheikh Mujib, has been commissioned in Khilkhet, Dhaka. This is the only operational base in Dhaka naval region. UN missions, multinational exercises and naval diplomacy In 1993 the Bangladesh Navy joined United Nations Peacekeeping Operations. Its first UN mission came in 2005, when a Bangladesh Navy contingent was sent to Sudan as Force Riverine Unit (FRU). The Bangladesh Navy is currently serving in United Nations Interim Force in Lebanon (UNIFIL) in Lebanon since 2010, when two ships, and , were deployed there in May of that year. The BN is the third Asian and only subcontinental navy to serve in the volatile region. The BN maintained the two ships thousands of miles from Bangladesh in the Mediterranean Sea for four years until June 2014, when the ships were replaced by and . BN ships regularly participate in exercises with other navies, gaining valuable experience and improving their fighting capabilities. CARAT is a yearly exercise conducted with the United States Navy in the Bay of Bengal since 2011. The BN has sent an OPV to every MILAN multinational naval exercise held near the Andaman Islands since 2010. AMAN, another multinational exercise held every two years in the Arabian Sea, organised by the Pakistan Navy, has also seen participation by BN frigates since 2009. BNS Bangabandhu participated in Exercise