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


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