HMS Swiftsure (1903)

HMS Swiftsure

Company type	Pre-dreadnought battleship
Industry	Naval warfare
Founded	26 February 1902 (keel laid)
Defunct	1920 (sold for dismantling)
Fate	Sold for dismantling
Headquarters	Elswick , United Kingdom
Products	Battleship
Number of employees	729 crew (1906)

HMS Swiftsure Overview

HMS Swiftsure—initially named Constitución—served as the lead vessel of the Swiftsure-class series of pre-dreadnought battleships. Originally commissioned by the Chilean Navy, the ship was acquired by the United Kingdom to help resolve the Argentine–Chilean naval arms race. Upon entering British service, Swiftsure was first deployed with the Home Fleet and Channel Fleet, before joining the Mediterranean Fleet in 1909. She returned to the Home Fleet in 1912 and subsequently transferred to the East Indies Station in 1913, where she served as flagship.

Following the outbreak of World War I in August 1914, Swiftsure undertook escort missions for troop convoys across the Indian Ocean. In December of that year, she was reassigned to patrol duties along the Suez Canal. During early 1915, the battleship played a defensive role against Ottoman assaults on the Canal. In February, she was redeployed to the Dardanelles, participating in naval bombardments targeting Ottoman fortifications as part of the Dardanelles Campaign. From early 1916 onward, Swiftsure performed convoy escort operations in the Atlantic Ocean until her decommissioning in April 1917, when her crew was redirected to man anti-submarine vessels. In mid-1918, she was disarmed with plans to serve as a blockship during a proposed second assault on Ostend. Ultimately, Swiftsure was sold for dismantling in 1920.

Construction and Specifications

Ordered in 1901 by Chile and built by Armstrong Whitworth at Elswick (yard number 733), the ship’s keel was laid on 26 February 1902. She was launched on 12 January 1903 and subsequently renamed HMS Swiftsure upon her acquisition by Britain on 3 December 1903. Completion occurred in June 1904, with commissioning following on 21 June of that year.

The vessel displaced 12,175 long tons (12,370 t) under normal load and up to 13,840 long tons (14,060 t) when fully loaded. Her overall length measured 475 feet 3 inches (144.86 m), with a beam of 71 feet 1 inch (21.67 m) and a deep draught of 27 feet 4 inches (8.33 m). Propulsion was provided by two vertical triple-expansion steam engines driving two shafts, powered by twelve Yarrow boilers generating 12,500 indicated horsepower (9,300 kW). This configuration enabled a maximum speed of 19 knots (35 km/h; 22 mph) and a range of approximately 6,210 nautical miles (11,500 km; 7,150 mi) at cruising speed of 10 knots (19 km/h; 12 mph).

Armament included two BL 10-inch Mk VI guns mounted in twin turrets, supplemented by fourteen BL 7.5-inch guns and fourteen QF 14-pounder Mk I guns. Additional weaponry comprised four QF 6-pounder Hotchkiss guns and two submerged 18-inch torpedo tubes.

Protection featured a belt armor thickness ranging from 3–7 inches (76–178 mm), bulkheads between 2–6 inches (51–152 mm), decks from 1–3 inches (25–76 mm), an eleven-inch conning tower, turrets armored between 8–10 inches (200–250 mm), barbettes from 2–10 inches (51–254 mm), and casemates at seven inches. The crew complement stood at 729 personnel as of 1906.

Design and description

Originally commissioned by Chile under the name Constitución, Swiftsure was ordered as a countermeasure to Argentina's acquisition of two armoured cruisers from Italy amid escalating tensions. Following the easing of the dispute, Chile encountered financial difficulties and decided to sell the vessel in early 1903. Fearing that Russia might acquire the incomplete ships, the United Kingdom intervened and purchased them from Chile on 3 December 1903 for £2,432,000. The design adhered to Chilean requirements, particularly the necessity to fit within the graving dock at Talcahuano, and was classified by British standards as a second-class battleship.

General characteristics

Swiftsure measured an 475 feet 3 inches (144.9 m) overall length, with a beam spanning 71 feet 1 inch (21.7 m), and had a draught of 28 feet 6 inches (8.7 m) when fully loaded. The vessel displaced 12,175 long tons (12,370 t) under standard load conditions and 13,840 long tons (14,060 t) at full load. At deep load, her metacentric height was calculated at 4.01 feet (1.22 m). In 1906, her complement consisted of 729 officers and enlisted personnel.

Propulsion

Propulsion was provided by two four-cylinder inverted vertical triple-expansion steam engines, each connected to a separate propeller shaft. Steam was generated by twelve Yarrow water-tube boilers, enabling the engines to produce a combined output of 12,500 indicated horsepower (9,300 kW), designed to achieve speeds of up to 19.5 knots (36.1 km/h; 22.4 mph). However, during sea trials, Swiftsure surpassed expectations by exceeding 20 knots (37 km/h; 23 mph). Her coal capacity reached a maximum of 2,048 long tons (2,081 t), which allowed for a range of approximately 6,210 nautical miles (11,500 km; 7,150 mi) at a cruising speed of 10 knots (19 km/h; 12 mph). Operational experience revealed that both she and her sister ship were more fuel-efficient than initially estimated, with an extended range near 12,000 nautical miles (22,000 km; 14,000 mi) at 10 knots.

Armament

Swiftsure anchored circa 1908

The main battery comprised four 45-calibre BL 10-inch Mk VI guns, arranged in two twin gun turrets positioned fore and aft of the superstructure. These guns fired shells weighing 500 pounds (230 kg) at a muzzle velocity of 2,656 feet per second (810 m/s), achieving a maximum range of 14,800 yards (13,500 m) at an elevation angle of 13.5°. The Mk VI guns had a firing rate estimated at one round every 15 seconds. Each gun was supplied with an ammunition stockpile of 90 rounds.

The secondary armament included fourteen 50-calibre 7.5-inch Mk III guns. Ten were installed within a central battery on the main deck; the remaining four were placed in casemates adjacent to the fore- and mainmasts on the upper deck. A significant drawback was that the main deck guns were mounted only about 10 feet (3.0 m) above the waterline at full load, rendering them ineffective during high-speed operation or rough seas due to their muzzles dipping below the water when rolling beyond 14°. These guns fired projectiles weighing 200 pounds (91 kg) with a muzzle velocity of 2,781 feet per second (848 m/s), capable of delivering four rounds per minute. Their maximum range at an elevation of 15° was roughly 14,000 yards (13,000 m). Each gun carried an allotment of 150 shells.

For defense against torpedo boats, fourteen QF 14-pounder Mk I guns were installed; these were adapted to fire the standard 12.5 pounds (5.7 kg) shell used by British (QF) 12 pounder 18 cwt guns. The guns discharged 3 inches (76 mm), 12.5-pound shells at a muzzle velocity of approximately 2,548 feet per second (777 m/s); however, their maximum effective range and firing rate remain undocumented. Each carried an ammunition reserve of around 200 rounds. Additionally, four QF 6 pounder Hotchkiss guns were mounted in the ship's fighting tops but were removed between 1906 and 1908.

The torpedo armament consisted of two submerged torpedo tubes measuring 18 inches (450 mm), one located on each broadside. The vessel carried nine torpedoes in total.

Armour

The armour arrangement of the Swiftsure closely resembled that found on the Duncan class. The primary waterline belt consisted of Krupp cemented armour (KCA) with a thickness of approximately 7 inches (178 mm). This belt extended vertically about 8 feet (2.4 m), with roughly 5 feet 3 inches (1.6 m) submerged below the waterline under normal load conditions. On either side of the 2–6-inch (51–152 mm) angled bulkheads that linked the belt to the barbettes, the belt persisted but with diminished thickness. Adjacent to the barbettes, it measured six inches, tapering down to two inches both forward and aft of them. The belt extended forward to the bow, providing support for the ship’s spur-type ram, and stretched aft to conclude at a 3-inch (76 mm) transverse bulkhead protecting the steering gear compartment. An upper band of 7-inch armour shielded the vessel’s sides from behind the barbettes up to the upper deck level. The casemates on the upper deck were guarded by 7-inch plates on their fronts and sides, enclosed at the rear by 3-inch armour. The main deck’s 7.5-inch guns were separated by 1-inch (25 mm) thick screens, with half-inch plating safeguarding the funnel uptakes positioned behind them. A longitudinal bulkhead, one inch thick, bisected the battery along its centreline.

The turret faces featured armour thickness of 9 inches (229 mm), while their sides and rears were protected by plates measuring 8 inches (203 mm). The roofs of these turrets were covered with two-inch armour, and the gunners’ sighting hoods were shielded by 1.5 inches (38 mm) thick protection. Above the upper deck, barbette faces were fortified with 10 inches (254 mm) armour, reducing to eight inches on their rear sections. Below this deck level, thickness tapered to three inches on the front and two inches at the back. The conning tower boasted face armour of 11 inches (279 mm) and eight inches on its rear side. Deck armour within the central citadel varied between 1 and 1.5 inches in thickness, while outside this area, the lower deck was protected by three-inch plates that sloped inward to meet the lower edge of the belt armour.

Construction and service

Pre-World War I

Originally ordered by Chile under the name Constitución, Swiftsure was constructed by Armstrong Whitworth at their Elswick yard, with her keel laid down on 26 February 1902. She was launched on 12 January 1903 and completed by June 1904. Commissioning took place at Chatham Dockyard on 21 June 1904 for deployment within the Home Fleet. Following a fleet restructuring in January 1905, this fleet was renamed as the Channel Fleet. On 3 June 1905, Swiftsure collided with her sister ship Triumph, resulting in damage to her propellers, sternwalk, and aft hull section. She underwent repairs and refitting at Chatham Dockyard during June and July 1906. The vessel was placed briefly into reserve status at Portsmouth Dockyard from 7 October 1908 until recommissioning on 6 April 1909 for service in the Mediterranean Fleet. On 8 May 1912, she returned to Home Fleet duties before entering an extensive refit period lasting from September 1912 until March 1913. Following this overhaul, Swiftsure was recommissioned on 26 March and assigned as flagship to the East Indies Station.

World War I

Swiftsure engaging Ottoman defenses while providing cover for the landings at West Beach, Cape Helles, 25 April 1915.

Throughout the First World War, the vessel initially escorted convoys of Indian troops traveling from Bombay to Aden between September and November 1914. This escort mission became redundant following the sinking of the German light cruiser SMS Emden, which had been conducting raids in the Indian Ocean. Subsequently, on 1 December, she was reassigned to the Suez Canal Patrol to assist in protecting the Canal, although she continued to serve as flagship of the East Indies Station while stationed at Suez. Between 27 January and 4 February 1915, she played a role in defending the Canal near Kantara during the Ottoman Empire's First Suez Offensive.

In February 1915, Swiftsure was succeeded as flagship of the East Indies Station by the armored cruiser Euryalus and redeployed to the Dardanelles for participation in the Dardanelles Campaign. She joined the Dardanelles Squadron on 28 February and engaged in the assault on Fort Dardanos on 2 March. Alongside Triumph, she was detached on 5 March for operations targeting forts at Smyrna, before returning to the Dardanelles on 9 March. The ship took part in the principal attack on the Narrows forts on 18 March and supported amphibious landings at West Beach, Cape Helles, on 25 April, as well as subsequent operations including the offensive against Achi Baba on 4 June. On 18 September, a German submarine launched an unsuccessful attack against her during a voyage from Mudros to Suvla Bay. Additionally, she participated in bombarding Dedeagatch on 18 January 1916.

Departing from the Dardanelles in February 1916, Swiftsure left Kephale on 7 February bound for Gibraltar, where she joined the 9th Cruiser Squadron tasked with Atlantic Patrol duties and convoy escort missions across the Atlantic. In March 1917, she left this squadron, sailing from Sierra Leone on 26 March and arriving at Plymouth on 11 April. The ship was decommissioned at Chatham on 26 April to provide personnel for anti-submarine vessels. Subsequently placed in reserve, she underwent refitting at Chatham mid-1917 and was repurposed as an accommodation ship starting February 1918. Later that year in autumn, she was disarmed and stripped in preparation for use as a blockship intended to obstruct entry to Ostend harbor during a planned second attempt; however, this operation was rendered unnecessary by the war's conclusion. Briefly serving as a target ship, Swiftsure was ultimately offered for sale in March 1920 and sold for dismantling to the Stanlee Shipbreaking Company on 18 June 1920.