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In the rating system of the Royal Navy, a third rate was a ship of the line which from the 1720s mounted between 64 and 80 guns, typically built with two gun decks (thus the related term two-decker).
When the rating system was first established in the 1620s, the third rate was defined as those ships having at least 200 but not more than 300 men; previous to this, the type had been classified as "middling ships". By the 1660s, the means of classification had shifted from the number of men to the number of carriage-mounted guns, and third rates at that time mounted between 48 and 60 guns. By the turn of the century, the criterion boundaries had increased and third rate carried more than 60 guns, with second rates having between 90 and 98 guns, while first rates had 100 guns or more, and fourth rates between 48 and 60 guns. By the latter half of the 18th century, they carried between 500 and 720 men.
This designation became especially common because it included the seventy-four gun ship, which eventually came to be the most popular size of large ship for navies of several different nations. It was an easier ship to handle than a first- or second-rate ship, but still possessed enough firepower to potentially destroy any single opponent other than a three-decker. It was also cheaper to operate.
By the end of the 18th century, ships of the line were usually categorized directly by their number of guns, the numbers even being used as the name of the class, as in "a squadron of three 74s", but officially the rating system continued until the end of the Age of Sail, only undergoing a modification in 1817.
Note that the use of terms like "third-rate" in literature can lead to confusion: The French Navy had a different system of five rates or rangs, but some British authors use the Royal Navy's rating of "third rate" when speaking of a French 74.
In the rating system of the Royal Navy used to categorise sailing warships, a first rate was the designation for the largest ships of the line. Originating in the Jacobean era with the designation of Ships Royal capable of carrying at least 400 men, the size and establishment of first-rates evolved over the following 250 years to eventually denote ships of the line carrying at least 80 guns across three gundecks. By the end of the eighteenth century, a first-rate carried no fewer than 100 guns and more than 850 crew, and had a measurement (burthen) tonnage of some 2,000 tons.
In 1603 all English warships with a complement of fewer than 160 men were known as 'small ships'. In 1625/26 to establish pay rates for officers, a six-tier naval ship rating system was introduced. These small ships were divided into three tiers: fourth-, fifth- and sixth-rates. Up to the end of the 17th century, the number of guns and the complement size were adjusted until the rating system was actually clarified. A 'fourth-rate' was nominally a ship of over thirty guns with a complement of 140 men.
During the 18th and 19th centuries, a sloop-of-war was a warship of the British Royal Navy with a single gun deck that carried up to 18 guns. The rating system of the Royal Navy covered all vessels with 20 or more guns; thus, the term encompassed all unrated warships, including gun-brigs and cutters. In technical terms, even the more specialised bomb vessels and fire ships were classed by the Royal Navy as sloops-of-war, and in practice these were employed in the role of a sloop-of-war when not carrying out their specialised functions.
In the rating system of the Royal Navy used to categorise sailing warships, a second-rate was a ship of the line which by the start of the 18th century mounted 90 to 98 guns on three gun decks; earlier 17th-century second rates had fewer guns and were originally two-deckers or had only partially armed third gun decks. A "second rate" was the second largest class of warships in a hierarchical system of six "ratings" based on size and firepower.
In the rating system of the Royal Navy used to categorise sailing warships, a fifth rate was the second-smallest class of warships in a hierarchical system of six "ratings" based on size and firepower.
In the rating system of the Royal Navy used to categorise sailing warships, a sixth-rate was the designation for small warships mounting between 20 and 28 carriage-mounted guns on a single deck, sometimes with smaller guns on the upper works and sometimes without. It thus encompassed ships with up to 30 guns in all. In the first half of the 18th century the main battery guns were 6-pounders, but by mid-century these were supplanted by 9-pounders. 28-gun sixth-rates were classed as frigates, those smaller as 'post ships', indicating that they were still commanded by a full ('post') captain, as opposed to sloops of 18 guns and less, which were under commanders.
The rating system of the Royal Navy and its predecessors was used by the Royal Navy between the beginning of the 17th century and the middle of the 19th century to categorise sailing warships, initially classing them according to their assigned complement of men, and later according to the number of their carriage-mounted guns. The rating system of the Royal Navy formally came to an end in the late 19th century by declaration of the Admiralty. The main cause behind this declaration focused on new types of gun, the introduction of steam propulsion and the use of iron and steel armour which made rating ships by the number of guns obsolete.
HMS Cornwall was a 74-gun third-rate Vengeur-class ship of the line built for the Royal Navy in the 1810s. She spent most of her service in reserve and was converted into a reformatory and a school ship in her later years. The ship was broken up in 1875.
The Endymion class was a class of six Royal Navy 40-gun fifth-rate frigates, with the prototype launched in 1797 and five slightly amended versions built of fir launched from 1813 to 1814.
The Glorious First of June of 1794 was the first and largest naval action between the French and British fleets during the French Revolutionary Wars. The action was fought over 400 miles (640 km) west of Ushant, the most western point on Brittany in France, deep in the Atlantic Ocean. The British fleet under Lord Howe was attempting to defeat a French fleet under Villaret de Joyeuse which was in turn attempting to lure Howe away from a grain convoy destined for France from the United States. The future of the French Revolution depended on this 117-strong convoy, which would save France from famine if it arrived safely. Ultimately, both admirals were successful in their ambitions; Howe defeated Villaret in open battle and sunk or captured seven of his ships. Villaret managed to occupy Howe for long enough and inflict sufficient damage that the convoy escaped unscathed.
HMS Severn was a 50-gun fourth-rate ship of the line of the Royal Navy, launched at Blackwall Yard in 1695.
HMS Falmouth was a 50-gun fourth-rate ship of the line built for the Royal Navy in the first decade of the 18th century. The ship participated in several battles during the War of the Spanish Succession (1701–15) and the War of Jenkins' Ear (1739–48).
HMS Gloucester was a 50-gun fourth-rate ship of the line built at Deptford by Joseph Allin the elder for the Royal Navy in 1710/11. She participated in the War of the Spanish Succession. The ship was burned to prevent capture after she was damaged in a storm during Commodore George Anson's voyage around the world in 1742.
British Warships in the Age of Sail is a series of four books by maritime historian Rif Winfield comprising a historical reference work providing details of all recorded ships that served or were intended to serve in the (British) Royal Navy from 1603 to 1863. Similar volumes dealing with other navies during the Age of Sail have followed from the same publisher.
Post ship was a designation used in the Royal Navy during the second half of the 18th century and the Napoleonic Wars to describe a sixth-rate ship that was smaller than a frigate, but by virtue of being a rated ship, had to have as its captain a post captain rather than a lieutenant or commander. Thus ships with 20 to 26 guns were post ships, though this situation changed after 1817.
The Swan class were built as a 14-gun class of ship sloops for the Royal Navy, although an extra two guns were added soon after completion.
HMS Myrmidon was a 20-gun Hermes-class sixth-rate post ship built for the Royal Navy during the 1810s. She was commissioned in 1813 and was in the Mediterranean four years later. The ship was on the Africa Station in 1819 and was paid off three years later. Myrmidon was broken up in 1823.
HMS Thetis was a 46-gun Leda-class fifth-rate frigate built for the Royal Navy during the 1810s. She was first commissioned in 1823 and was assigned to the South America Station three years later. The ship was wrecked in 1830 off Cape Frio, Brazil, with the loss of 22 crewmen; most of her cargo of bullion was successfully salvaged.
HMS Arethusa was a 46-gun Leda-class fifth-rate frigate built for the Royal Navy during the 1810s. The ship was never commissioned and was converted into a lazarette in 1836. She was renamed HMS Bacchus in 1844 and was further converted into a coal hulk in 1851–52. The ship was sold for scrap in 1883.
