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Agun-brig was a smallbrig-rigged warship that enjoyed popularity in theRoyal Navy during the Napoleonic Wars, during which large numbers were purchased or built. In general these were vessels of under 200 tonsburthen, and thus smaller than the more commonCherokee-classbrig-sloops or the even largerCruizer-classbrig-sloops. The gun-brigs generally carried 12 guns, comprising two long guns in thechase position and tencarronades on the broadsides.

For brig-rigged sloops, seeList of corvette and sloop classes of the Royal Navy. For gunboats, seeList of gunboat and gunvessel classes of the Royal Navy.

The earliest gun-brigs were shallow-draught vessels. Initially they were not brigs at all, but were classed as 'gunvessels' and carried aschooner orbrigantine rig. They were re-rigged asbrigs about 1796 and re-classed under the new term 'gun-brig'. They were designed as much to row as to sail, and carried their primary armament firing forward - a pair of long 18-pounders or 24-pounders, weapons which in any practical sense could only be trained and fired with the vessel under oars.

The 1797 batch introduced means to improve their sailing ability. Each was fitted with a Schank drop keel,^[a] and lighterbow chasers replaced the heavy pair of guns firing forward over the bows; in later vessels one of the bow chasers would be moved aft to become a stern chaser, both of these guns then being mounted on the centreline and able to pivot. The broadside weapons consisted of 18-pounder carronades mounted on slides along both sides.

The later gun-brigs developed from this beginning into smaller versions of the brig-sloops with increased draught and seaworthiness, but were less suited for inshore warfare. Compared with the flat-bottomed hulls of the 1794-1800 designs, by the time of theConfounder class the hulls had achieved a relatively sharp cross-section, as performance under sail had become a more important consideration than ease of rowing. By now they were clearly seen as small versions of the brig-sloop rather than enlarged gunboats.

The early gun-brigs were seen as inshore and coastal vessels, and saw their first service in coastal operations, notably in the Channel, where they sought out French coastal shipping. As their numbers grew and more seaworthy designs emerged, they were deployed worldwide, notably in the Baltic where many were involved in confrontations with the myriad of Danish gunboats during theGunboat War, but also on such distant stations as the East Indies.

The purpose-built gun-brigs were all established with a complement of 50 men, and maintained this level throughout their main period of operation, although the actual number carried varied with availability. The final batch saw the complement raised to 60. Each gun-brig had a lieutenant in command (unlike brig-sloops, which were under commanders), and while he was the only commissioned officer aboard, he was assisted by a midshipman and a number of warrant officers - a master's mate (ranked as 'master and pilot') to share the watches, carpenter's mate, gunner's mate, boatswain's mate and surgeon's mate. Other petty officers included a ropemaker, sailmaker, clerk, quartermaster and quartermaster's mate. There were fifteen marines on board - a sergeant to command, a corporal, and thirteen privates. The rest of the crew were ranked as seamen - able seamen, ordinary seamen or landsmen.

The naval historian and novelistC. S. Forester commented in relation to the gun-brigs that:

The type was a necessary one but represented the inevitable unsatisfactory compromise when a vessel has to be designed to fight, to be seaworthy and to have a long endurance, all on a minimum displacement and at minimum expense. Few men in the Royal Navy had a good word to say for the gun-brigs, which rolled terribly and were greatly over-crowded, but they had to be employed.

In this criticism of the gun-brig, Forester was perhaps being a little unfair; the class had been designed largely as convoy escorts for coastal operations and it is little wonder they rolled heavily in the open sea. They performed sterling service in a wide range of conditions not envisaged by their designers, making them analogous in this respect to theFlower-classcorvette of World War II; cheap, uncomfortable, over-crowded, and lightly armed but completely essential.

The following sub-sections describe the sequence of the gun-brigs built to individual designs from the earliest acquisitions of 1793 until the last gun-brigs joined the Navy in 1813.

Three vessels of about 140 tons each were purchased in 1793, and armed with two 18-pounder long guns and ten 18-pounder carronades. They were numbered (not named)GB No. 1,GB No. 2 andGB No. 3.^{[Note 1]} No further details were recorded, but their existence probably explains why the initial numbering of theAcute class below (prior to their being given names) began withGB No. 4.

Class overview
Name	Conquest-class gun-brig
Operators	Royal Navy
In service	1794–1817
Completed	12
General characteristics
Type	Gun-brig
Tons burthen	14641⁄94bm[2]
Length	75 ft (23 m) (gundeck) 62 ft3+1⁄8 in (18.977 m) (keel)
Beam	21 ft (6.4 m)
Depth of hold	7 ft (2.1 m)
Sail plan	Brig
Complement	50
Armament	2 × 24-pounder bow guns 10 × 18-pounder carronades

The first batch of twelve gun-brigs were all built by contract to a design bySurveyor of the NavySir John Henslow, and ordered on 6 March 1794; they were all named and registered on 26 May. They were designed to be rowed (with 18 oars) as well as sailed, for which purpose they carried a brig rig, though it was originally planned to rig them asschooners orbrigantines. The initial plan was that they would mount a main armament of 4-pounderlong guns, but this was rapidly substituted by a broadside battery of ten 18-poundercarronades, with two 24-pounders aschase guns in the bow and two 4-pounders as chase guns in the stern. The 4-pounders were soon deleted, making them all 12-gun vessels.

From March 1795 all twelve of the class were attached to the Inshore Squadron commanded by Captain SirSidney Smith.

Class overview
Name	Acute-class gun-brig
Operators	Royal Navy
In service	1797–1805
Completed	15
General characteristics
Type	Gun-brig
Tons burthen	15863⁄94bm[3]
Length	75 ft (23 m) (gundeck) 61 ft7+5⁄8 in (18.786 m) (keel)
Beam	22 ft (6.7 m)
Depth of hold	7 ft 11 in (2.41 m)
Sail plan	Brig
Complement	50
Armament	2 × 24-pounder bow guns 10 × 18-pounder carronades

A further design by John Henslow, to which fifteen vessels were ordered on 7 February 1797. In this design, the breadth was increased by a foot from theConquest class, and the depth of the hold was increased by eleven inches. All were brig-rigged and receivedSchank sliding or dropkeels.^[3]

Initially these were intended to be classed as gunboats, and were given numbers (nos.GB No. 4 toGB No. 18)^{[Note 1]} rather than names, but on 7 August they were re-classed as gunbrigs and given names. They carried the same armament as their predecessors.

Class overview
Name	Courser-class gun-brig
Operators	Royal Navy
In service	1797–1803
Completed	15
General characteristics
Type	Gun-brig
Tons burthen	16750⁄94bm[4]
Length	76 ft (23 m) (gundeck) 62 ft2+5⁄8 in (18.964 m) (keel)
Beam	22 ft 6 in (6.86 m)
Depth of hold	8 ft 3 in (2.51 m)
Sail plan	Brig
Complement	50
Armament	2 × 24-pounder bow guns 10 × 18-pounder carronades

At the same time as John Henslow was designing theAcute class, his colleague, fellow-Surveyor Sir William Rule, was ordered to produce an alternative design. Rule's design too incorporated a Schank drop or sliding keel.^[4]

Fifteen vessels to this design - theCourser class - were ordered at the same time as those to theAcute class. A sixteenth unit was added to the order a month later. Originally numberedGB No. 19 toGB No. 33, plusGB No. 45,^{[Note 1]} the following sixteen vessels were all given names on 7 August 1797.

The first ten of these small mercantile brigs were all purchased at Leith and fitted there for naval service, being registered on the Navy List on 5 April 1797. An eleventh vessel (Staunch) was purchased in frame in Kent and registered on 15 April 1797. These assorted vessels did not constitute a single class, but as procured as a group they are here treated similarly. Originally numberedGB No. 34 toGB No. 44,^{[Note 1]} the following eleven vessels were all given names on 7 August 1797.

Built in 1798 as a cutter, and re-rigged by the Navy as a brig, this was a very small vessel of only 60 tons, established with just 18 men and six 3-pounder guns. One should perhaps consider this vessel in practice simply as a gunboat, although she was rated as a gun-brig. In 1825 Malay pirates captured her and massacred her entire crew before wrecking her onBabar Island in the southernMoluccas.

Class overview
Name	Archer-class gun-brig
Operators	Royal Navy
In service	1801–1815
Completed	10 (in 1801 batch)
General characteristics
Type	Gun-brig
Tons burthen	17731⁄94bm[6]
Length	80 ft (24 m) (gundeck) 65 ft10+1⁄4 in (20.072 m) (keel)
Beam	22 ft 6 in (6.86 m)
Depth of hold	9 ft 5 in (2.87 m)
Sail plan	Brig
Complement	50
Armament	2 × 18- or 32-pounder bow carronades + 10 × 18-pounder carronades

As in 1797, the two Surveyors were asked to produce alternative designs for the next batch of gun-brigs, which were lengthened by five feet from the previous classes. Ten vessels were ordered at the close of 1800 to Sir William Rule's design. One,Charger, received an 8-inch brass mortar in 1809.^[6]

Class overview
Name	Bloodhound-class gun-brig
Operators	Royal Navy
In service	1801–1815
Completed	10
Lost	4
General characteristics[7]
Type	Gun-brig
Tons burthen	18439⁄94 (bm)
Length	80 ft (24 m) (gundeck) 65 ft6+1⁄2 in (19.977 m) (keel)
Beam	23 ft (7.0 m)
Depth of hold	8 ft 6 in (2.59 m)
Sail plan	Brig
Complement	50
Armament	2 × 18- or 32-pounder bow carronades + 10 × 18-pounder carronades

Sir John Henslow produced his equivalent design to that of Rule'sArcher batch, and ten vessels were ordered to this design just nine days after those of his colleague's design.

During theFrench Revolutionary War, some twenty-one similar vessels were captured from the French (both naval vessels and privateers) and commissioned in the Royal Navy as gun-brigs. These assorted vessels did not constitute a single class, but as all were procured from the enemy during theFrench Revolutionary War they are here treated similarly.

• Espiegle^[8]
• Actif
• Requin
• Dixmunde
• Nieuport
• Ostend
• Resolue
• Lacedemonian
• Athenienne
• Venom
• Transfer
• Deux Amis
• Halifax
• Fortune
• Aventurier
• Anacreon
• Marianne, of 12 guns, captured byTigre on 1 March 1799, recaptured by the French, recaptured by the British in November 1799 and sold September 1801 at the end of the campaign in Egypt.^[9]

Commodore SirSidney Smith inTigre took a flotilla of seven vessels atAcre on 18 March 1799. The British took them into service.^[10]

• Negresse;
• Foudre;
• Dangereuse;
• Marie-Rose
• Vierge-de-Grâce
• Deux Freres;
• Torride.

• Guachapin

During theFrench Revolutionary War, two similar vessels were captured from the Dutch and commissioned in the Royal Navy as gun-brigs. These vessels did not constitute a single class, but as both were procured from the enemy during theFrench Revolutionary War they are here treated similarly.

• Amboyna
• Mongoose

Class overview
Name	Archer-class gun-brig
Operators	Royal Navy
In service	1804–post 1815
Completed	48 (in 1804 batch)
Lost	20
General characteristics
Type	Gun-brig
Tons burthen	17731⁄94bm[11]
Length	80 ft (24 m) (gundeck) 65 ft10+1⁄4 in (20.072 m) (keel)
Beam	22 ft 6 in (6.86 m)
Depth of hold	9 ft 5 in (2.87 m)
Sail plan	Brig
Complement	50
Armament	2 ×chase guns (varying calibres) + 10 × 18-pounder carronades

Most of the early gun-brigs were sold or broken up during the short-livedPeace of Amiens. Consequently, in the first half of 1804, the Admiralty ordered a further batch of forty-seven gun-brigs to the 1800William Rule design - 25 on 9 January, seven on 22 March and 15 during June - with an additional one ordered from Halifax Dockard, Nova Scotia on 1 October. Many reused the names of gun-brigs that had been disposed of or lost before 1804.

These four assorted vessels purchased in June 1804 did not constitute a single class, but as procured as a group they are here treated similarly.

Class overview
Name	Confounder-class gun-brig
Operators	Royal Navy
In service	1804–post 1815
Completed	21
General characteristics
Type	Gun-brig
Tons burthen	17948⁄94bm[12]
Length	84 ft (26 m) (gundeck) 69 ft8+3⁄4 in (21.253 m) (keel)
Beam	22 ft (6.7 m)
Depth of hold	11 ft (3.4 m)
Sail plan	Brig
Complement	50
Armament	2 × 12-pounder chase guns, on traversing carriages, one in the bow and one in the stern; on some vessels 6- or 9-pounder guns replaced the 12-pounder guns[12] 10 × 18-poundercarronades

TheConfounder-class vessels were built to an 1804 design by William Rule. The design reflected learning from the experiences of the earlier gunbrig classes. As a result, theConfounder-class vessels were more "sea-kindly" and better able to handle long voyages.^[12] Two vessels were converted to mortar brigs in 1809.^[12]

These two vessels were the former Revenue cuttersSpeedwell andRanger respectively. These two assorted vessels did not constitute a single class, but as procured from the same source they are here treated similarly.

Class overview
Name	Bold-class gun-brig
Operators	Royal Navy
In service	1812–post 1815
Completed	18
General characteristics
Type	Gun-brig
Tons burthen	17947⁄94bm[13]
Length	84 ft (25.6 m) (gundeck) 69 ft8+3⁄4 in (21.3 m) (keel)
Beam	22 ft (6.7 m)
Depth of hold	11 ft 1 in (3.4 m)
Sail plan	Brig
Complement	60
Armament	2 × 6-pounder bow guns 10 × 18-pounder carronades

A revival of Sir William Rule'sConfounder class of 1804, this final group was built to a somewhat modified version of that design, and were commonly referred to as theBold class. Twelve were ordered in November 1811, and a further batch of six followed in November 1812. Unlike earlier brigs of this size, most were re-rated as brig-sloops at or soon after their completion, and were under commanders (rather than lieutenants), at least until 1815–17, when they reverted to being gun-brigs.^[13]

During the early years of theNapoleonic War, some seventeen similar vessels were captured from the French (both naval vessels and privateers) and commissioned in the Royal Navy as gun-brigs. These assorted vessels did not constitute a single class, but as all were procured from the enemy during theNapoleonic War they are here treated similarly.

• Caroline
• Saint Lucia
• Eclipse
• Papillon
• Cerf
• Hirondelle
• Morne Fortunee (i)
• Seaforth
• Hart
• Decouverte
• Unique
• Netley (i)
• Netley (ii)
• Tigress
• Morne Fortunee (ii)
• Swaggerer
• Carlotta (i)
• Carlotta (ii)
• Caledon

• Enchantress
• Linnet
• Pygmy
• Rolla − Purchased 1806; sold 1810
• Maria
• Nancy - Purchased 1809; sold 1813.

During theNapoleonic War, two similar vessels were captured from the Spanish and commissioned in the Royal Navy as gun-brigs. These vessels did not constitute a single class, but as both were procured from the enemy during this war they are here treated similarly.

• Leocadia
• Raposa

During theNapoleonic War, two similar vessels were captured from the Danes and commissioned in the Royal Navy as gun-brigs. These vessels did not constitute a single class, but as both were procured from the enemy during this war they are here treated similarly.

• Brev Drageren
• Warning

• Patriot
• Jahde
• Ems
• Mandarin (ex DutchMadurense)

• Mohawk (ex USSViper)

• Bibliography of 18th–19th century Royal Naval history

• Demerliac, Alain (1996).La Marine de Louis XVI: Nomenclature des Navires Français de 1774 à 1792 (in French). Éditions Ancre.ISBN 9782906381230.OCLC 468324725.
• Hepper, David J. (1994).British Warship Losses in the Age of Sail, 1650-1859. Rotherfield: Jean Boudriot.ISBN 0-948864-30-3.
• Winfield, Rif (2008).British Warships in the Age of Sail 1793–1817: Design, Construction, Careers and Fates. Seaforth Publishing.ISBN 978-1-86176-246-7.

• Lists of Royal Navy ships by type
• Lists of gunboats
• Military units and formations of the United Kingdom

• CS1 errors: ISBN date
• Articles with short description
• Short description with empty Wikidata description
• Use dmy dates from April 2017
• Use British English from April 2017
• All Wikipedia articles written in British English
• CS1 French-language sources (fr)