Caledonia-class ship of the line

Class overview
Launch of HMS Trafalgar
Name:	Caledonia
Operators:	Royal Navy
Succeeded by:	Nelson class
In service:	25 June 1808 – 1918
Planned:	10
Completed:	9
General characteristics
Type:	Ship of the line
Length:	205 ft (62 m) (gundeck) 170 ft 11 in (52.10 m) (keel) Broadened: 205 ft 5 ¹⁄₂ in (62.624 m) (gundeck) 170 ft 6 in (51.97 m) (keel)
Beam:	53 ft 6 in (16.31 m) 54 ft 6 in (16.61 m) (broadened)
Depth of hold:	23 ft 2 in (7.06 m)
Propulsion:	Sails
Armament:	120 guns: Gundeck: 32 × 32-pounders Middle gundeck: 34 × 24-pounders Upper gundeck: 34 × 18-pounders Quarterdeck: 6 × 12-pounders, 10 × 32-pounder carronades Forecastle: 2 × 12-pounders, 2 × 32-pounder carronades Poop deck: 2 × 18-pounder carronades
Notes:	Ships in class include: Caledonia, Britannia, Prince Regent, Royal George, Neptune, Royal William, Waterloo, St George, Trafalgar

The Caledonia-class ships of the line were a class of nine 120-gun first rates, designed for the Royal Navy by Sir William Rule. A tenth ship (Royal Frederick) was ordered on 29 October 1827 to the same design, but was launched in 1833 as Queen to a fresh design by Sir William Symonds.

The armament remained the same for the first three ships of the class, with the exception of an increase in firepower on the poop deck from 2 to 6 18-pounder carronades. The armament for the fourth ship was significantly modified, with two of the 32-pounders on the main gun deck being replaced with 68-pounder carronades, all guns on the middle and upper gun decks being replaced with the same number of 32-pounders, four of the 12-pounder guns on the quarterdeck were replaced with 32-pounder carronades, and the remaining two were increased to 18-pounders, along with the two 12-pounders on the forecastle, and the carronades on the poop deck were removed. The remaining five ships were built to a slightly broadened version of the draught, and this sub-class was armed in the same way as the last of the standard Caledonias, HMS Royal George. Except for Caledonia herself, all these ships were converted into steam-powered screw battleships during the 1850s.

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