Question: Which medium-lift helicopter is operated by 829 Naval Air Squadron?
Context: The AgustaWestland AW101 is a medium-lift helicopter used in both military and civil applications.  It was developed by a joint venture between Westland Helicopters in the United Kingdom and Agusta in Italy in response to national requirements for a modern naval utility helicopter.  Several operators, including the armed forces of Britain, Denmark, Norway and Portugal, use the name Merlin for their AW101 aircraft.  It is manufactured at factories in Yeovil, England and Vergiate, Italy; licensed assembly work has also taken place in Japan and the United States. 706 Naval Air Squadron (706 NAS) was a Naval Air Squadron of the Royal Navy's Fleet Air Arm.  Established as a fighter and torpedo-bomber training unit in Australia at the end of World War Two, it was briefly reformed as a helicopter squadron in the early 1950s, before becoming a helicopter training unit in 1962, and operating until 1998. 829 Naval Air Squadron is a squadron of the Royal Navy Fleet Air Arm.  It operates the AgustaWestland Merlin HM.2 helicopter. The 3rd Carrier Air Group of the Royal Navy's Fleet Air Arm was formed on 2 August 1945.  It was a spare air group for the British Pacific Fleet based at HMAS Albatross, Australia.  It was formed too late for service in the war, and it contained 854 Naval Air Squadron flying the Grumman TBF Avenger, 1843 Naval Air Squadron and 1845 Naval Air Squadron flying the Vought F4U Corsair.  It was disbanded on 20 October 1945, and its personnel returned to the United Kingdom on board a merchant ship. The 8th Carrier Air Group of the Fleet Air Arm was formed on 30 June 1945.  It was based on the aircraft carrier HMS "Implacable" for service in the British Pacific Fleet and contained 828 Naval Air Squadron flying the Grumman TBF Avenger, 801 Naval Air Squadron and 880 Naval Air Squadron flying the Supermarine Seafire and 1771 Naval Air Squadron flying the Fairey Firefly.  It was disbanded in April 1946, but some of its squadrons disbanded earlier. 857 Naval Air Squadron was a squadron of the Royal Navy Fleet Air Arm.  It was first formed on 1 April 1944 at Squantum NAS in the United States as a torpedo reconnaissance unit with Grumman Avenger IIs.  It reformed in its present state on 13 December 2006, when 849 Naval Air Squadron B Flight recommissioned as 857 Naval Air Squadron. 782 Naval Air Squadron (782 NAS) was a Naval Air Squadron of the Royal Navy's Fleet Air Arm.  It initially formed in November 1939 as an Armament Training Squadron but disbanded in December to provide personnel for 774 Naval Air Squadron. 792 Naval Air Squadron (792 NAS) was a Naval Air Squadron of the Royal Navy's Fleet Air Arm and was originally formed at RNAS St Merryn in August 1939 as an Air Target Unit, equipped with six Blackburn Skuas.  The squadron disbanded in 1945 and merged with 794 Naval Air Squadron. The Indian Navy currently operates twenty-one air squadrons. Of these, ten operate fixed-wing aircraft, eight are helicopter squadrons and the remaining three are equipped with unmanned aerial vehicles (UAV).  Building on the legacy inherited from the Royal Navy prior to Indian independence, the concept of naval aviation in India started with the establishment of Directorate of Naval Aviation at Naval Headquarters (NHQ) in early 1948.  Later that year officers and sailors from the Indian Navy were sent to Britain for pilot training.  In 1951, the Fleet Requirement Unit (FRU) was formed to meet the aviation requirements of the navy.  On 1 January 1953, the charge of Cochin airfield was handed over to the navy from the Directorate General of Civil Aviation.  On 11 March, the FRU was commissioned at Cochin with ten newly acquired Sealand aircraft.  The navy's first air station, INS "Garuda", was commissioned two months later.  From February 1955 to December 1958, ten Firefly aircraft were acquired.  To meet the training requirements of the pilots, the indigenously developed HAL HT-2 trainer was inducted into the FRU.  On 17 January 1959, the FRU was commissioned as Indian Naval Air Squadron (INAS) 550, to be the first Indian naval air squadron.  In the following two years, three more naval air squadrons—INAS 300, INAS 310 and INAS 551—were commissioned.  The first two operated from the newly purchased aircraft carrier INS "Vikrant" flying Sea Hawks and Alizés, whereas the latter one, equipped with Vampires, was used for training purposes. The 7th Carrier Air Group was part of the Royal Navy's Fleet Air Arm and was formed on 30 June 1945.  It was based on the aircraft carrier HMS "Indefatigable" for service in the British Pacific Fleet and contained 820 Naval Air Squadron flying the Grumman TBF Avenger, 887 Naval Air Squadron and 894 Naval Air Squadron flying the Supermarine Seafire and 1700 Naval Air Squadron flying the Fairey Firefly.  It was disbanded in March 1946.
Answer: The AgustaWestland AW101