Königsberg class light cruiser (1915)
Encyclopedia
The Königsberg class of light cruiser
Light cruiser
A light cruiser is a type of small- or medium-sized warship. The term is a shortening of the phrase "light armored cruiser", describing a small ship that carried armor in the same way as an armored cruiser: a protective belt and deck...

s was a group of four ships commissioned into Germany's Imperial Navy
Kaiserliche Marine
The Imperial German Navy was the German Navy created at the time of the formation of the German Empire. It existed between 1871 and 1919, growing out of the small Prussian Navy and Norddeutsche Bundesmarine, which primarily had the mission of coastal defense. Kaiser Wilhelm II greatly expanded...

 shortly before the end of World War I
World War I
World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

. The class comprised , , , and , all of which were named after light cruisers lost earlier in the war. The ships were an incremental improvement over the preceding s, and were armed with a main battery of eight 15 cm SK L/45 guns and had a designed speed of 27.5 kn (15 m/s).

Königsberg and Nürnberg saw action at the Second Battle of Heligoland Bight
Second Battle of Heligoland Bight
The Second Battle of Heligoland Bight was a naval engagement during the First World War. On 17 November 1917, German minesweepers clearing a path through the British minefield in the Heligoland Bight near the coast of Germany were intercepted by two British light cruisers, and , performing...

, where Königsberg was hit by a shell from the battlecruiser
Battlecruiser
Battlecruisers were large capital ships built in the first half of the 20th century. They were developed in the first decade of the century as the successor to the armoured cruiser, but their evolution was more closely linked to that of the dreadnought battleship...

 . Three of the four ships were to participate in a climactic fleet operation to attack the British Grand Fleet in the final days of the war, but revolts in the fleet
Wilhelmshaven mutiny
The Kiel mutiny was a major revolt by sailors of the German High Seas Fleet on 3 November 1918. The revolt triggered the German revolution which was to sweep aside the monarchy within a few days. It ultimately led to the end of the First World War and to the establishment of the Weimar Republic.-...

 forced the cancellation of the plan. Karlsruhe, Emden, and Nürnberg were interned at Scapa Flow
Scapa Flow
right|thumb|Scapa Flow viewed from its eastern endScapa Flow is a body of water in the Orkney Islands, Scotland, United Kingdom, sheltered by the islands of Mainland, Graemsay, Burray, South Ronaldsay and Hoy. It is about...

 after the end of the war, and were scuttled on 21 June 1919
Scuttling of the German fleet in Scapa Flow
The scuttling of the German fleet took place at the Royal Navy's base at Scapa Flow, in Scotland, after the end of the First World War. The High Seas Fleet had been interned there under the terms of the Armistice whilst negotiations took place over the fate of the ships...

, though only Karlsruhe was successfully sunk. The other two ships were beached by British sailors and ceded to the Allies. Königsberg was transferred to the French Navy as a war prize and commissioned as Metz; she served with the French Navy until the 1930s, when she was broken up for scrap.

Design

The design for the Königsberg was prepared in 1913. The design was an incremental improvement over the previous , with a larger hull and greater displacement, but with the same armament, speed, and armor protection. By 1916, thirteen German light cruiser
Light cruiser
A light cruiser is a type of small- or medium-sized warship. The term is a shortening of the phrase "light armored cruiser", describing a small ship that carried armor in the same way as an armored cruiser: a protective belt and deck...

s had been lost in the course of World War I; after they were commissioned, the ships of the Königsberg class took the names of four of these lost cruisers.

Königsberg was ordered as Ersatz
Ersatz
Ersatz means 'substituting for, and typically inferior in quality to', e.g. 'chicory is ersatz coffee'. It is a German word literally meaning substitute or replacement...

and laid down at the AG Weser
AG Weser
Aktien-Gesellschaft Weser was one of the great German shipbuilding companies, located at the Weser River in Bremen. Founded in 1873 it was finally closed in 1983. Altogether, AG Weser built about 1400 ships of different types, including many war ships...

 shipyard in Bremen
Bremen
The City Municipality of Bremen is a Hanseatic city in northwestern Germany. A commercial and industrial city with a major port on the river Weser, Bremen is part of the Bremen-Oldenburg metropolitan area . Bremen is the second most populous city in North Germany and tenth in Germany.Bremen is...

 in 1914. She was launched on 18 December 1915 and commissioned eight months later on 12 August 1916. Emden, ordered as Ersatz , followed her sister at AG Weser, also in 1914. She was launched on 1 February 1916 and commissioned into the fleet on 16 December 1916. Karlsruhe was ordered as Ersatz and laid down in 1915 at the Imperial Dockyard
Kaiserliche Werft Kiel
Kaiserliche Werft Kiel was a German shipbuilding company founded in 1867, first as Königliche Werft Kiel but renamed in 1871 with the proclamation of the German Empire...

 in Kiel
Kiel
Kiel is the capital and most populous city in the northern German state of Schleswig-Holstein, with a population of 238,049 .Kiel is approximately north of Hamburg. Due to its geographic location in the north of Germany, the southeast of the Jutland peninsula, and the southwestern shore of the...

. Launching ceremonies took place on 31 January 1916, and after fitting-out
Fitting-out
Fitting-out, or "outfitting”, is the process in modern shipbuilding that follows the float-out of a vessel and precedes sea trials. It is the period when all the remaining construction of the ship is completed and readied for delivery to her owners...

 work was completed, she was commissioned on 15 November 1916. The last ship of the class, Nürnberg, was laid down as Ersatz at the Howaldtswerke
Howaldtswerke
Howaldtswerke-Deutsche Werft is a German shipbuilding company, headquartered in Kiel. In 2009 it was the largest shipyard in Germany and has more than 2,400 employees. It has been part of ThyssenKrupp Marine Systems owned by ThyssenKrupp, since 2005...

 shipyard in Kiel in 1915. She was launched on 14 April 1916 and commissioned on 15 February 1917.

General characteristics and machinery

The ships of the class were 145.8 metres (478.3 ft) long at the waterline and 151.4 m (496.7 ft) long overall. They had a beam
Beam (nautical)
The beam of a ship is its width at the widest point. Generally speaking, the wider the beam of a ship , the more initial stability it has, at expense of reserve stability in the event of a capsize, where more energy is required to right the vessel from its inverted position...

 of 14.2 m (46.6 ft) and a draft
Draft (hull)
The draft of a ship's hull is the vertical distance between the waterline and the bottom of the hull , with the thickness of the hull included; in the case of not being included the draft outline would be obtained...

 of 5.96 m (19.6 ft) forward and 6.32 m (20.7 ft) aft. The ships had a designed displacement of 5440 metric tons (5,354.1 LT), and at full combat load, they displaced 7125 MT (7,012.5 LT). Their hulls
Hull (watercraft)
A hull is the watertight body of a ship or boat. Above the hull is the superstructure and/or deckhouse, where present. The line where the hull meets the water surface is called the waterline.The structure of the hull varies depending on the vessel type...

 were built with longitudinal steel frames. The hulls were divided into eighteen watertight compartments and incorporated a double bottom
Double bottom
A double bottom is a ship hull design and construction method where the bottom of the ship has two complete layers of watertight hull surface: one outer layer forming the normal hull of the ship, and a second inner hull which is somewhat higher in the ship, perhaps a few feet, which forms a...

 that extended for forty-five percent of the length of the keel
Keel
In boats and ships, keel can refer to either of two parts: a structural element, or a hydrodynamic element. These parts overlap. As the laying down of the keel is the initial step in construction of a ship, in British and American shipbuilding traditions the construction is dated from this event...

. The ships had a complement of 17 officers and 458 enlisted men. They carried several smaller vessels, including one picket boat, one barge, one cutter, two yawl
Yawl
A yawl is a two-masted sailing craft similar to a sloop or cutter but with an additional mast located well aft of the main mast, often right on the transom, specifically aft of the rudder post. A yawl (from Dutch Jol) is a two-masted sailing craft similar to a sloop or cutter but with an...

s, and two dinghies
Dinghy
A dinghy is a type of small boat, often carried or towed for use as a ship's boat by a larger vessel. It is a loanword from either Bengali or Urdu. The term can also refer to small racing yachts or recreational open sailing boats. Utility dinghies are usually rowboats or have an outboard motor,...

. The German Navy regarded the ships as good sea boats, having gentle motion. The ships were highly maneuverable and had a tight turning radius, and but lost speed going into a turn. In hard turns, they lost up to sixty percent speed. The ships were stern-heavy.

The propulsion systems for Königsberg, Emden, and Nürnberg consisted of two steam turbine
Steam turbine
A steam turbine is a mechanical device that extracts thermal energy from pressurized steam, and converts it into rotary motion. Its modern manifestation was invented by Sir Charles Parsons in 1884....

s, while Karlsruhe was outfitted with two sets of high-pressure geared turbines. The turbines for all four ships were powered by ten coal-fired boilers and two oil-fired double-ended boilers
Water-tube boiler
A water tube boiler is a type of boiler in which water circulates in tubes heated externally by the fire. Fuel is burned inside the furnace, creating hot gas which heats water in the steam-generating tubes...

. The turbines drove a pair of three-bladed screws, which were 3.5 m (11.5 ft) in diameter. The engines were rated at 31000 shp for a top speed of 27.5 knots (15 m/s). On trials, Königsberg reached 45900 shp and a top speed of 27.8 kn (15.1 m/s), while Karlsruhe made 55700 shp and 27.7 kn (15.1 m/s). Emden reached 50216 shp and 27.7 kn; Nürnbergs trials figures are not recorded. The trials were conducted in shallow water due to the war; in deep water, the ships would have exceeded 29 kn (15.8 m/s).

Coal storage was 350 MT (344.5 LT) as designed, though up to 1340 MT (1,318.8 LT) could be carried. Fuel oil was initially 150 MT (147.6 LT), and could be similarly increased to 500 MT (492.1 LT). At a cruising speed of 12 kn (6.5 m/s), the ships could steam for approximately 4850 nautical miles (8,982.2 km). At a higher speed of 27 kn (14.7 m/s), the range fell considerably, to 1200 nmi (2,222.4 km). Electrical power was provided by two turbo generators and one diesel
Diesel engine
A diesel engine is an internal combustion engine that uses the heat of compression to initiate ignition to burn the fuel, which is injected into the combustion chamber...

 generator, with a total output of 300 kilowatts at 220 volt
Volt
The volt is the SI derived unit for electric potential, electric potential difference, and electromotive force. The volt is named in honor of the Italian physicist Alessandro Volta , who invented the voltaic pile, possibly the first chemical battery.- Definition :A single volt is defined as the...

s. Steering was controlled by a single, large rudder.

Armament and armor

The ship was armed with eight 15 cm SK L/45 guns in single pedestal mounts. Two were placed side by side forward on the forecastle
Forecastle
Forecastle refers to the upper deck of a sailing ship forward of the foremast, or the forward part of a ship with the sailors' living quarters...

, four were located amidships, two on either side, and two were arranged in a super firing pair
Superfire
The idea of superfire is to locate two turrets in a row, one behind the other, but with the second turret located above the one in front so that the second turret could fire over the first...

 aft. These guns fired a 45.3 kilograms (99.9 lb) shell at a muzzle velocity
Muzzle velocity
Muzzle velocity is the speed a projectile has at the moment it leaves the muzzle of the gun. Muzzle velocities range from approximately to in black powder muskets , to more than in modern rifles with high-performance cartridges such as the .220 Swift and .204 Ruger, all the way to for tank guns...

 of 840 m/s. The guns had a maximum elevation of 30 degrees, which allowed them to engage targets out to 17600 m (57,742.8 ft). They were supplied with 1,040 rounds of ammunition, for 130 shells per gun. The ships also carried two 8.8 cm L/45
8.8 cm SK L/45 naval gun
The 8.8 cm SK L/45 The 8.8 cm SK L/45 The 8.8 cm SK L/45 (SK - Schnelladekanone (quick loading cannon) L - Länge (with a 45-caliber barrel) was a German naval gun that was used in World War I on a variety of mounts.-Description:...

 anti-aircraft guns mounted on the centerline astern of the funnels. These guns fired a 10 kg (22 lb) shells at a muzzle velocity of 750 metre per second. She was also equipped with four 50 cm (20 in) torpedo tube
Torpedo tube
A torpedo tube is a device for launching torpedoes. There are two main types of torpedo tube: underwater tubes fitted to submarines and some surface ships, and deck-mounted units installed aboard surface vessels...

s with eight torpedoes, two in deck-mounted swivel launchers and two submerged in the ships' hulls. The ships were also outfitted to carry up to 200 mines
Naval mine
A naval mine is a self-contained explosive device placed in water to destroy surface ships or submarines. Unlike depth charges, mines are deposited and left to wait until they are triggered by the approach of, or contact with, an enemy vessel...

.

The Cöln class ships were protected by an armored belt composed of Krupp cemented steel. It was 60 mm (2.4 in) thick amidships and 18 mm (0.708661417322835 in) forward. The stern was not protected by armor. The armored deck was 20 mm (0.78740157480315 in) thick in the stern, 40 mm (1.6 in) thick amidships, and 60 mm thick forward. Sloped armor 40 mm thick connected the deck and belt armor. The conning tower
Conning tower
A conning tower is a raised platform on a ship or submarine, often armored, from which an officer can con the vessel; i.e., give directions to the helmsman. It is usually located as high on the ship as practical, to give the conning team good visibility....

 had 100 mm (3.9 in) thick sides and a 20 mm thick roof. The main battery guns were protected with 50 mm (2 in) thick gun shields. A 20 mm thick deck and 30 mm thick side armor protected the mine hold
Hold (ship)
thumb|right|120px|View of the hold of a container shipA ship's hold is a space for carrying cargo. Cargo in holds may be either packaged in crates, bales, etc., or unpackaged . Access to holds is by a large hatch at the top...

.

Service history

On 17 November 1917, Königsberg and Nürnberg saw action at the Second Battle of Heligoland Bight
Second Battle of Heligoland Bight
The Second Battle of Heligoland Bight was a naval engagement during the First World War. On 17 November 1917, German minesweepers clearing a path through the British minefield in the Heligoland Bight near the coast of Germany were intercepted by two British light cruisers, and , performing...

. Along with two other cruisers from the II Scouting Group and the dreadnought
Dreadnought
The dreadnought was the predominant type of 20th-century battleship. The first of the kind, the Royal Navy's had such an impact when launched in 1906 that similar battleships built after her were referred to as "dreadnoughts", and earlier battleships became known as pre-dreadnoughts...

 battleship
Battleship
A battleship is a large armored warship with a main battery consisting of heavy caliber guns. Battleships were larger, better armed and armored than cruisers and destroyers. As the largest armed ships in a fleet, battleships were used to attain command of the sea and represented the apex of a...

s and , Königsberg and Nürnberg escorted minesweepers
Minesweeper (ship)
A minesweeper is a small naval warship designed to counter the threat posed by naval mines. Minesweepers generally detect then neutralize mines in advance of other naval operations.-History:...

 clearing paths in minefields laid by the British. During the engagement, the battlecruiser
Battlecruiser
Battlecruisers were large capital ships built in the first half of the 20th century. They were developed in the first decade of the century as the successor to the armoured cruiser, but their evolution was more closely linked to that of the dreadnought battleship...

  scored a hit on Königsberg, which did minimal damage but started a serious fire. The British broke off the attack when the German battleships arrived on the scene, after which the Germans also withdrew. All four ships participated in Operation Albion
Operation Albion
Operation Albion was the German land and naval operation in September-October 1917 to invade and occupy the Estonian islands of Saaremaa , Hiiumaa and Muhu , then part of the Russian Republic...

, an amphibious operation against the islands in the Gulf of Riga
Gulf of Riga
The Gulf of Riga, or Bay of Riga, is a bay of the Baltic Sea between Latvia and Estonia. According to C.Michael Hogan, a saline stratification layer is found at a depth of approximately seventy metres....

. Emden served as the flagship for the Leader of Torpedoboats, while the other three ships were assigned to the II Scouting Group.

In October 1918, three of the ships and the rest of the II Scouting Group were to lead a final attack on the British navy. Königsberg , , and were to attack merchant shipping in the Thames estuary
Thames Estuary
The Thames Mouth is the estuary in which the River Thames meets the waters of the North Sea.It is not easy to define the limits of the estuary, although physically the head of Sea Reach, near Canvey Island on the Essex shore is probably the western boundary...

 while Karlsruhe, Nürnberg, and were to bombard targets in Flanders
Flanders
Flanders is the community of the Flemings but also one of the institutions in Belgium, and a geographical region located in parts of present-day Belgium, France and the Netherlands. "Flanders" can also refer to the northern part of Belgium that contains Brussels, Bruges, Ghent and Antwerp...

, to draw out the British Grand Fleet. Großadmiral
Grand Admiral
Grand admiral is a historic naval rank, generally being the highest such rank present in any particular country. Its most notable use was in Germany — the German word is Großadmiral.-France:...

Reinhard Scheer
Reinhard Scheer
Reinhard Scheer was an Admiral in the German Kaiserliche Marine. Scheer joined the navy in 1879 as an officer cadet; he progressed through the ranks, commanding cruisers and battleships, as well as major staff positions on land. At the outbreak of World War I, Scheer was the commander of the II...

, the commander in chief of the fleet, intended to inflict as much damage as possible on the British navy, in order to secure a better bargaining position for Germany, whatever the cost to the fleet. On the morning of 29 October 1918, the order was given to sail from Wilhelmshaven the following day. Starting on the night of 29 October, sailors on and then on several other battleships mutinied
Wilhelmshaven mutiny
The Kiel mutiny was a major revolt by sailors of the German High Seas Fleet on 3 November 1918. The revolt triggered the German revolution which was to sweep aside the monarchy within a few days. It ultimately led to the end of the First World War and to the establishment of the Weimar Republic.-...

. The unrest ultimately forced Hipper and Scheer to cancel the operation. When informed of the situation, the Kaiser stated, "I no longer have a navy."

Following the Armistice that ended the fighting, Königsberg took Rear Admiral Hugo Meurer
Hugo Meurer
Hugo Meurer was a Vice-Admiral of the Kaiserliche Marine . Meurer was the German naval officer who handled the negotiations of the surrender of the German fleet in November 1918 at the end of World War I....

 to Scapa Flow
Scapa Flow
right|thumb|Scapa Flow viewed from its eastern endScapa Flow is a body of water in the Orkney Islands, Scotland, United Kingdom, sheltered by the islands of Mainland, Graemsay, Burray, South Ronaldsay and Hoy. It is about...

 to negotiate with Admiral David Beatty
David Beatty, 1st Earl Beatty
Admiral of the Fleet David Richard Beatty, 1st Earl Beatty, GCB, OM, GCVO, DSO was an admiral in the Royal Navy...

, the commander of the Grand Fleet, for the place of internment of the German fleet. The accepted arrangement was for the High Seas Fleet
High Seas Fleet
The High Seas Fleet was the battle fleet of the German Empire and saw action during World War I. The formation was created in February 1907, when the Home Fleet was renamed as the High Seas Fleet. Admiral Alfred von Tirpitz was the architect of the fleet; he envisioned a force powerful enough to...

 to meet the combined Allied fleet in the North Sea and proceed to the Firth of Forth
Firth of Forth
The Firth of Forth is the estuary or firth of Scotland's River Forth, where it flows into the North Sea, between Fife to the north, and West Lothian, the City of Edinburgh and East Lothian to the south...

 before transferring to Scapa Flow, where they would be interned. Most of the High Seas Fleet's ships, including Karlsruhe, Emden, and Nürnberg, were interned in the British naval base in Scapa Flow, under the command of Rear Admiral Ludwig von Reuter
Ludwig von Reuter
Ludwig von Reuter was a German admiral during World War I, who commanded the Imperial German Navy's High Seas Fleet when it was interned at Scapa Flow at the end of the war. On 21 June 1919 he ordered the scuttling of the fleet to prevent the British from seizing the ships.-Early life:Reuter was...

. Königsberg instead remained in Germany.

The unruly crew of , the fleet flagship, forced Reuter to transfer to Emden, where a Sailors' Council cooperated with the ship's captain to run the ship. The fleet remained in captivity during the negotiations that ultimately produced the Versailles Treaty. Von Reuter believed that the British intended to seize the German ships on 21 June 1919, which was the deadline for Germany to have signed the peace treaty. Unaware that the deadline had been extended to the 23rd, Reuter ordered the ships to be sunk at the next opportunity. On the morning of 21 June, the British fleet left Scapa Flow to conduct training maneuvers, and at 11:20 Reuter transmitted the order to his ships.

Karlsruhe sank at 15:50; the rights to salvaging the ship were sold in 1962. She has not been raised for scrapping, however. Emden was boarded by British sailors who beached her before she could be completely sunk. After being refloated, she was ceded to France and used as a test ship for explosives before being broken up in 1926. Nürnberg was also beached by British sailors. She was eventually sunk off the Isle of Wight
Isle of Wight
The Isle of Wight is a county and the largest island of England, located in the English Channel, on average about 2–4 miles off the south coast of the county of Hampshire, separated from the mainland by a strait called the Solent...

 as a gunnery target. Königsberg was meanwhile stricken from the naval register on 20 July 1920 and ceded to France. She was renamed Metz and served with the French Navy until 1933. She was ultimately broken up for scrap in 1936.
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