Intrepid-class ship of the line

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HMS Diadem at the capture of the Cape of Good Hope
Class overview
Name	Intrepid
Operators	Royal Navy
Preceded by	Ardent class
Succeeded by	Worcester class
In service	4 December 1770 - 1827
Completed	15
Lost	3
General characteristics
Type	Ship of the line
Length	159 ft 6 in (48.62 m) (gundeck) 131 ft 0 in (39.93 m) (keel)
Beam	44 ft 4 in (13.51 m)
Depth of hold	19 ft (5.8 m)
Propulsion	Sails
Complement	500 officers and men (491 from 1794)
Armament	64 guns: Gundeck: 26 × 24 pounders Upper gundeck: 26 × 18 pdrs Quarterdeck: 10 × 4 pdrs Forecastle: 2 × 9 pdrs

The Intrepid-class ships of the line were a class of fifteen 64-gun third rates, designed for the Royal Navy by Sir John Williams. His design, approved on 18 December 1765, was slightly smaller than Sir Thomas Slade's contemporary Worcester-class design of the same year, against which it was evaluated competitively. Following the prototype, four more ships were ordered in 1767–69, and a further ten between 1771 and 1779.