Sir John Hunter. Eric Yarrow had followed his father on his death as chairman in 1962, becoming the third generation of the family to lead the firm. During this period, Yarrow was involved in designing and building many of the Royal Navy's post-war escort fleet; including the Type 81 Tribal class, Type 14 Blackwood class and the Type 12M Rothesay-class frigates. The company was also involved in the Leander class programme. During the 1960s ships were built for the navies of South Africa, Chile, Malaysia, Thailand, New Zealand and Iran. Upper Clyde Shipbuilders and aftermath In 1968 the Company became part of Upper Clyde Shipbuilders which collapsed in 1971. Yarrows had already left the UCS joint venture by April 1970 however, as the only profitable division of the joint venture. In 1974 it acquired the neighbouring Elderslie Dockyard, owned by Barclay Curle, which lay to the west of the Yarrow yard and included an extensive complex of three drydocks originally built in 1904 (No. 1 Dry Dock), 1933 (No. 2 Dry Dock) and 1965 (No. 3 Dry Dock). During this period Yarrow was involved in the Type 12I Leander-class frigate programme as well as the for the Chilean Navy and the design of the for the Indian Navy. The long-term investment in facilities and strong manufacturing credentials, combined with the development of the Yarrow Admiralty Research Department (YARD) ensured that when the number of warship yards was dramatically reduced by the Navy in the 1970s, Yarrows was chosen as one of mainstream contractors alongside Swan Hunter, Vosper (for the Type 21s) and Cammell Laird. The Type 21 was the first type in the Navy to be a combined Gas Turbine and Diesel design, using the marine variant of the Rolls-Royce Olympus gas turbine (also used in Concorde). 5 out of 8 Type 21s, 10 out of 14 Type 22s, 12 out of 16 Type 23s and all the Type 45s were built at Scotstoun, demonstrating the firm's dominance in the market for medium-sized RN surface vessels. The sleek, good looks and the sporting performance of the Type 21 frigates led to the captains of the ships being called "boy racers". The vessel could stop from full speed in twice the length of the ship. HMS Ardent was destroyed by Argentinian aircraft in Falkland Sound in May 1982. All of the Yarrow built Type 21s served in the Falklands Nationalisation In