4th rate ship of the line

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The fourth rate is the smallest vessel styled a “ship of the line” (of battle), carrying as many as 60 guns.

Ships of the line of battle are the mainstay of fighting fleets: strong and stable gun platforms for battering enemy vessels into submission. The designation of “fourth rate” for ships of this size is a British Royal Navy one, and covers a number of designs, all with very similar handling and combat power. All fourth rates are square-rigged, two-deck ships, with up to 60 guns on board in a mixture of calibres: usually a mixture of 24-, 18- and 12-pounders, with the heavier guns mounted on the lower deck.

Even though fourth rates are obviously smaller than the third-rate 74s, their firepower is much lower than a simple number-of-guns comparison would indicate. There is no structural strength or space for coping with the recoil of massive guns. As a result, a fourth rate may only have half the weight of fire of a larger ship, although partially it makes up for this by being a handier sailing vessel, especially in shallow waters.

Historically, it was obvious by the 1750s that ships of this size were not tough enough to stand in the line of battle against larger vessels. Over time, various admiralties removed these smaller battle ships from the active service, or sent them to minor stations where they were unlikely to encounter powerful enemies. Some survived as converted transports.

The fourth rate is the smallest vessel styled a "ship of the line" (of battle), carrying as many as 60 guns.

Ships of the line of battle are the mainstay of fighting fleets: strong and stable gun platforms for battering enemy vessels into submission. The designation of “fourth rate” for ships of this size is a British Royal Navy one, and covers a number of designs, all with very similar handling and combat power. All fourth rates are square-rigged, two-deck ships, with up to 60 guns on board in a mixture of calibres: usually a mixture of 24-, 18- and 12-pounders, with the heavier guns mounted on the lower deck.

Even though fourth rates are obviously smaller than the third-rate 74s, their firepower is much lower than a simple number-of-guns comparison would indicate. There is no structural strength or space for coping with the recoil of massive guns. As a result, a fourth rate may only have half the weight of fire of a larger ship, although partially it makes up for this by being a handier sailing vessel, especially in shallow waters.

Historically, it was obvious by the 1750s that ships of this size were not tough enough to stand in the line of battle against larger vessels. Over time, various admiralties removed these smaller battle ships from the active service, or sent them to minor stations where they were unlikely to encounter powerful enemies. Some survived as converted transports.

General Information[]

Fourth rate ships are the smallest true "ship of the line." Although only marginally larger than 5th rates, they have stronger hulls and greater throw weight, carrying 54 cannon of various sizes. Well able to hold their own in a pitched battle, they are useful and flexible warships.

Fourth rates are the lightest ships to have the inferior range of 400. This means that they have a distinct disadvantage against Fifth Rates, which can kite them relatively easily.

Some factions' ship statistics are different from others; differences are listed below (traits that to not differ are not listed).

In 1603 all English warships with a compliment 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.[1] 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 compliment size was 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.

In the rating system of the Royal Navy used to categorize sailing warships in the 18th century, a fourth-rate was a ship of the line with 46 to 60 guns mounted. They were phased out of ship of the line service during the French Revolutionary and Napoleonic Wars, as their usefulness was declining; though they were still in service, especially on distant stations such as the East Indies. Fourth-rates took many forms, initially as small two decked warships, later as large frigates razéed from the initial two deck warships, and occasionally even heavily armed merchant ships such as HMS Calcutta.

Small two decked warships[edit]

A fourth-rate was, in the British Royal Navy during the first half of the 18th century, a ship of the line mounting from 46 up to 60 guns. While the number of guns stayed in the same range until 1817, after 1756 the ships of 50 guns and below were considered too weak to stand in the line of battle, although the remaining 60-gun ships were still classed as fit to be ships of the line. However, the 50-gun ship continued to be used largely during the Seven Years' War, and during the time of the American Revolution a whole new group of 50-gun ships was constructed, not for the battlefleet, but to meet the needs of combat in the shallow waters off North America where the larger ships found it difficult to sail. 50-gun ships were also suitable as convoy escorts and for service on foreign stations, where larger enemy vessels were unlikely to be encountered. Some saw service as flagships since, as two-deckers, they were able to accommodate a flag officer and his retinue, and they also had the physical presence of a flagship. Their usefulness was declining, however, and during the French Revolutionary and Napoleonic Wars few 50s were built, although several remained in service, especially on distant stations such as the East Indies. The 60-gun ships were also dying out, superseded initially by the 74-gun third-rates, although by 1793 there were still four 60-gun ships left in harbour service.

Some fourth-rates did remain in active service even during the Napoleonic Wars, especially in the shallow North Sea, where the Royal Navy's main opponents were the Baltic powers and the Dutch, whose own fleet consisted mainly of 50- to 64-gun ships (e.g. the 56-gun Delft). However, HMS Leander, 50 guns, was with Horatio Nelson at the Battle of the Nile. As late as 1807, fourth-rates were active in combat zones, illustrated by the fatal incident between HMS Leopard (50 guns), and the US frigate Chesapeake (38 guns), an incident which nearly led to war.

Large frigates and spar-decked frigates[edit]

American 44-gun frigates Constitution, United States and President were never in operational use armed with fewer than 50 guns including carronades, and were generally seen as equivalent to fourth-rates.[citation needed] The larger British 24-pounder frigates such as the later 1813 Leander and Newcastle, were of similar firepower to those big American 44s. The latter were launched (or razéed – i.e. converted by cutting down by one deck from existing smaller third-rate 74-gun two-deckers) during the last years of the Napoleonic War and the War of 1812 and were classed as fourth-rates in Royal Naval service under the revised rating system. This convention continued into the 19th century. Any of these later large fourth-rate frigates threw a close-range broadside (including from their heavy carronades) far superior to the earlier two-decker 50s or even to third-rate 64s.

Merchant conversions[edit]

Some ships of commerce such as the East Indiamen were heavily armed to protect themselves from pirates and privateers, effectively making them equivalent to fourth-rate ships of the line. The Royal Navy also converted some East Indiamen into fourth-rates for convoy duty, such as HMS Calcutta.

What is a fourth rate ship of the line?

What was a 5th rate ship of the line?

What is a third rate ship?

What are ship rates?