General Ship Specification
Class. Implacable. Indefatigable's boat decks are one higher than Implacable's
Displacement. 23,450 tons, Standard, 32,110 tons deep load
Speed. 32 Knots
Complement. 1,785 (Up to 2,467 by end of WW2). Aircraft 72 (81 with deck park)
Machinery. Parsons single reduction gear turbines. 4 shafts. 148,000 shp
Boilers. 8 Admiralty 3-drum type
Bunkerage. 4,690 Tons. Range 11,000 nautical miles at 14 knots
Armament. 16x4.5 inch dual purpose guns. 2 pdr pompoms. 48x40mm. 37x20mm Oerlikons. Refitted in Sydney to include 10x40mm Bofors
Armour. Main Belt 4.5 inches. Deck 3 to 2.5 inches.
Length. 673 ft (pp). 766 ft 6 ins (oa) 750 ft (fd)
Beam. 95 ft 6 ins (hull), 80 ft (fd)
Draught. 26 ft (mean), 28 ft 11 ins (deep load)
Radar. Types 281/277/293 system. Homing Beacon 72 DP
Ordered. 19.06.1939
Laid Down. 03.11.1939 at John Brown's Shipyard, Clydebank. (Delayed by P.M. in 1940)
Launched. 08.12.1942 by Victoria, Marchioness of Milford Haven, widow of Admiral of the Fleet, Prince Louis of Battenberg, Marquess of Milford Haven.
Completed. 03.05.1944
Commissioned. 08.12.1943