Neptune-class ship of the line

	HMS Neptune at the Battle of Trafalgar
Class overview
Name	Neptune class
Operators	Royal Navy
Preceded by	Boyne class
Succeeded by	Boyne class
In service	28 January 1797–1857
Completed	3
General characteristics
Type	Ship of the line
Length	185 ft (56 m) (gundeck); 152 ft 6+1⁄2 in (46.5 m) (keel);
Beam	51 ft (16 m)
Propulsion	Sails
Armament	98 guns:; Gundeck: 28 × 32 pdrs; Middle gundeck: 30 × 18 pdrs; Upper gundeck: 30 × 18 pdrs; Quarterdeck: 8 × 12 pdrs; Forecastle: 2 × 12 pdrs;
Notes	Ships in class include: Neptune, Temeraire, Dreadnought

The Neptune-class ships of the line were a class of three 98-gun second rates, designed for the Royal Navy by Sir John Henslow. All three of the ships in the class took part in the Battle of Trafalgar in 1805.