Swedish Navy WW1

The Scandinavian heavyweight

After the end of the union between the Norwegian and Swedish crowns, desired by Bernadotte in 1814 and completed smoothly in 1905, Sweden was left alone to control the passage of Skattegat and Skaggerak to the North Sea and de facto possessed the major part of the Baltic, the other being under Russian control, the old antagonist. Sweden was twice as lucky as its Scandinavian neighbors to have significant industrial resources and a very sea-friendly population with a history comparable to that of the Royal Navy. The parliament approved the construction of coastal battleships of a tonnage and firepower that eclipsed all those produced so far. Already considered the most powerful fleet of all Scandinavian countries, the Svenska Marinen was not far behind traditional European heavyweights like Holland and Spain.

Coastal Battleship HMS Aran
Coastal Battleship HMS Aran

The edge in submarines

One of the originality of the fleet was to have been a pioneer in submersibles, especially with the Nordenfelt class, produced by Bolinders Mekanika Verkstad and Nordenfelt, Karlsvik in Stockholm. Nordenfelt was also a major weapons manufacturer and its quick-firing naval guns were known in any Navy of the time. In 1885 these submersibles made a great impression after an international presentation and were sold to England, Greece, Turkey, and Russia. They preceded for more than 10 years the first submarines made by Laubeuf and Holland. This tradition continued afterwards, and by 1914 Sweden introduced a powerful submersible force.

Turkish Nordenfelt
Nordenfelt type submarine in Turkish service


Swedish naval bases were at Karlskrona, the main one, fortified at Vauban, possessing 6 large dryclasses and the base of the submersibles, Stockholm, forts, coastal batteries, 3 dry holds, and base torpedo boats, and Gothenburg. Two other bases were located at Farösund in Gotland and Hemsö in the Gulf of Bothnia. The navy, commanded by an admiral, was divided between the coastal defense and the fleet, divided into squadrons. Coastal defense was not limited to forts but included many well-protected batteries in granite bunkers, rail batteries, but also minelayers.

Hemsö Fortress
Hemsö fortress, strategically located in the Ångerman River outlet (built 1860s)

Overall strenght in 1914

Even for the Hochseeflotte, an invasion of Sweden (never a strategic goal for Germany) would not have been a cakewalk. These were the forces deployed by this country in 1914:
12 Coastal Battleships: 4 class Aran (1901), Oscar II (1905), Dristigethen (1900), 3 class Oden (1896), 3 class Svea (1886). 3 in construction class Sverige.
10 coastal Monitors: 3 Ericsson class (1865), 2 Skjöld class (1871), 5 Berserk class (1873).
7 Cruisers: Fylgia (1905), 5 torpedo-cruisers class Ornen (1896), Clas Fleming (1912).
8 Destroyers: 2 class Hugin (1910), 3 class Ragnar (1908), Wale (1907), Magne (1905), Fashion (1904), 2 other under construction.
49 Torpedo Boats:
-First class: 17 Plejad class (1905), 12 Komet class (1896), 2 Gondul class (1894), 3 Munin class (1886), Hugin (1884).
-Second class: 4 class No. 79, 2 class Agne, 2 class Bygve, 2 class Narf, Galdr, Blixt, Blink.
8 Submersible: Hajen (1904), Hvalen (1909), 3 class Undertvattensbaten No. 2 (1909), 2 in completion class Svärdfisken (1914), Delfinen (1914).
9 Miscellaneous: 2 Blenda class gunboats (1874), 5 Urd class (1877), Edda (1885), Angkanpramen minesweeper No. 9 (1912).

Tonnage 1914:
Coastal Battleships 12 – Monitors 10 – Cruisers 7 – Destroyers 8 – Torpedo Boats 49 – Submersible 8 – Miscellaneous 9

HMS Swerige, ww1-built coastal battleship.

The Swedish Navy during the First World War:

Coastal Battleship HMS Thule
Coastal Battleship HMS Thule

During the july 1914 crisis, King Gustaf and Knut Wallenberg (Swedish foreign minister), gave strict assurances to the Central Powers that an alliance with Russia was excluded in all cases. Sweden issued an official declaration of neutrality at the start of the conflict but with a reserve to take action later. In Germany, the general tone of this total rejection of Russia make the general staff think that if pushed too far, Sweden would choose Central powers side; Wallenberg, fearful that the Kaiser would send an ultimatum to force sweden to take side, reassured Franz von Reichenau that this neutrality would be “benevolent” to Germany. In addition tractations took place with the other Scandinavian powers (to avoid for example a sympathetic Norway to the British cause to take side), compounded in a common official declaration of neutrality by the kings of Denmark, Norway, and Sweden in December 1914.

The next year however, Germany tried hard to draw Sweden in their new dreamed scheme of “Mitteleuropa”, starting by Zimmermann making offers for a “nordic block” dominated by Sweden, and later concessions including the Åland Islands in return for a joint attack on St.Petersburg, other zones of influence and the promise of a neutral Finland. The government never flinch despite favorable views by King Gustav, but the Germans gained a secret concession out of these repeated efforts: They were granted the right to communicate with their embassies via Stockholm, through the Swedish network as their communications were censored and intercepted by the British. However in late 1915 one such German telegrams was interecepted by the British, noticing that certain Argentine ships be “sunk without trace”, and this caused a scandal.

HSwMS Hvalen and Skäggald depot ship
HSwMS Hvalen and Skäggald depot ship, supplying the submarine in 1915. Notice either snow of winter paint on the submarine’s hull. HSwMS Hvalen was later mistaken for a British submarine and hit by a German vessel.

By pressure, Germany obtained the closure and mining of the strait approach by Denmark and Norway, but Sweden resisted demands that its side of the Øresund should be mined. Eventually, Germany renounced but asked, and obtained the promise that Sweden’s lighthouses in the Øresund would be switched off and markers removed in case of an incursion of the Royal Navy. The case applied in October 1915, when British submarines made an incursion through the sound, sinking several german freighters and the armoured cruiser SMS Prinz Adalbert.. A Swedish submarine, HSwMS Hvalen, certainly mistaken for a British one, was hit by accident by German ship and this incident triggered official apologies and a compensation. After the summer of 1916, Sweden eventually complied to German pressure and mined the Kogrundsrännan channel (Oresund straits), drawing allied criticism about the move.

Another interesting aspect of the time was the move of respective iron-ore trade routes: Through government pressure, which was a member of the board of iron-ore production association, export was fixed at 22,500,000 tons maximum. But during wartime, all the production of the iron-ore fields of Gällivare in the baltic were re-routed from the allies to Germany, while at the contrary, the iron-ore fields of Kiruna exported via Narvik, went to the allies. A small percentage was still delivered to Germany, by sticking to the Norwegian coast or Norwegian waters. An allied demand after the entry of the USA into the war, was to reduce these exports to Germany in exchange of food deliveries to Sweden, that was also hit by the blockade. This question divided the parliament and provoked the fall of Sweden’s PM Hjalmar Hammarskjöld.

By the end of 1917, the German Army was about to seize St Petersburg and the German Secretary of State for Foreign Affairs renewed his demands to the Swedes to supply the Germans, in exchange to the Åland Islands that would be occupied by the Germans and then transferred to Swedish sovereignty. After the Finnish independence was acted and recoignised by Sweden on 4 January 1918, but there were still reservations about the islands until rumors of Russian atrocities created a stir in Sweden and a reaction on 13 February 1918. An expeditionary force was sent to occupy the Islands. Meanwhile the Finns also revendicated the islands, which led to a joint German-Swedish occupation until 25 April 1918, after which the Swedes retired and the Island were ceded to the Finns.

Swerige in firing exercises.

Sweden did not had a hard time keeping neutrality in the light of its naval arguments, so much so that after the virtual destruction of the Russian fleet during the Baltic civil war and the internment and later scuttling of the Hochseeflotte it remained the strongest naval force of the Baltic. Sweden’s actions were limited to ensuring that coasts were not violated by one or the other belligerent and to maintain the good progress of its trade efficiency, seriously reduced though, by the British blockade. From 1917, Swedish merchant ships were targeted by U-Bootes as well as others, and neutrality policy often flouted.

Enchanced swerige-class coastal battleship project, before the post-war ban of new constructions: It would have been armed with 6x 305 mm and 6x 105 mm guns.

In addition, since sweden’s workforce was free from any engagement, naval yards could work at full pace, and three Sverige-class coastal battleships, three Wrangel class destroyers and seven submersible of Laxen, Abboren and Hajen classes, three minesweepers were however built. In 1919, Sweden emerged from the conflict relatively shaken but still confident in the future. However an unprecedented pacifist movement took over the country, which set aside all shipbuilding programs for years. Until 1939, numerous withdrawals of obsolescent units reduced the overall tonnage considerably. It was not until 1936 that Sweden’s confidence in the League of Nations began to decline and plan for rearmament was drawn up.

Svenska Marinen in detail

Coastal battleships

Sverige class (1916)

Rendition of the future Sverige in 1912 during the fundraising campaign, now at the Sjöhistoriska museet

The Sverige-class coastal battleships were the largest ships ever to serve in the Swedish Navy at that point. Their design was totally new and inspired by other nations’s own dreadnought designs. Their armament was head and shoulders above the previous Oscar II (see below) with four 283 mm (11 in)/45 cal. Bofors guns in twin turrets (rather than two 210 mm in single turrets) and eight 152 mm (6 in) Bofors guns a single superfiring twin turret and six single broadside. Just one on three was ready on time fto serve in the end of WW1 but all three formed the backbone of the Swedish Navy during WW2, next interwar constructions revolving around cruisers, destroyers and submersibles.

Sverige in 1929, before modernisation
Sverige in 1929, before modernisation

“Sverige” (“Sweden”) had a special fate. She was initially decided in 1911 to start the type F submitted by the admiralty and chosen by the parliament. It was funded and voted. However there was a change of government the next year and the new liberal majority prime minister Karl Staaff decided against the ship, posponing it until an exhaustive analysis take place to motivate any further decisions. However soon a national move helped a campaign quickly to raise more money (over 15 million crowns) that was voted in 1911 (12 millions), called the “Pansarbåtinsamlingen”. Therefore the government was cornered to authorize the construction of the first ship, which was called “the people’s gift to the country”. The two next ships were voted in 1914 by the same government, now with a war on hands, called Drottning Victoria and Gustav V. Both were laid down however in 1915 due to material shortages and launched in September 1917 and Januray 1918 respectively. Meaning none was ready when the war ended, as both were completed in 1921 and 1922. They were modified wit the experience of the Sverige and also modified in the interwar. Both would be studied more in detail in the Swedish Navy WW2 page.

The Sverige-class were a new take on the coastal Defence ship, with an heavier armament, better speed and armour. But still the hull was tailored not for high seas but for local archipelagos and shallow waters. Their tactical doctrine and operations was also new. Indeed they formed the core of an open-sea battle group (which should have originally comprised four and not three ships), and were meant to operate with cruisers, destroyers, torpedo boats, but also air reconnaissance. This small battle group were to operate as a defensive force only. During WW2 thos doctrine was still active and indeed they offered a smaller target to submarines, torpedo crafts or dive-bombers and minefields, some authors suggested they were taken in consideration in the decision by the Germans high command in WW2 not to invade Sweden in 1940. In fact, Jane’s 1938 edition classed these ships as battleships due to their use in a coherent battle group.

Brassyes-class scheme
Brassey’s Naval annual armour scheme of the class, 1923

At 12 meters long and 6,852 tons standard, up to 7,516 tons fully loaded for the HSwMS Sverige, they were of another level also compared to Oscar II. Probably in 1914 they were the meanest coastal ship in any navy of the time, worthy of a “pocket dreadnought”. The armament comprised four 283 mm (11 in) 45 cal. Bofors that were equivalent to the german main battleship caliber of the time. However,
the rate of fire was about 17 seconds and the turrets were rather cramped because of the partition between guns inside both turrets. The eight 6 in/50 cal. QF guns in twin and single turrets was rather modern arrangement, more than usual broadside barbettes. In addition, four 75 mm (3 in) Bofors AA cannons were mounted forward of the rear turret already. There were also two anti-ship QF 57 mm (2.2 in) short-barreled Bofors and nine 6.5 mm (0.26 in) Machine-Guns, plus two 457 mm (18.0 in) torpedo tubes.

Armour scheme included a 200 mm (7.9 in) thick belt in the central section down to 100 mm (3.9 in), to 60 mm (2.4 in) ends, the upper section was 100 mm (3.9 in) behind fore barbette and aft barbettes. The twin main turret were 200 mm (7.9 in) on the front, and down to 100 mm (3.9 in) on the sides and a 50 mm (2.0 in) roof.The Barbettes were 150 mm (5.9 in) above the ammo wells, and the secondary turrets 125 mm (4.9 in) thick with 100 mm (3.9 in) barbettes. The forward conning Tower was 175 mm (6.9 in) in thckness and the decks ranged from 45 to 30 mm (1.8 to 1.2 in). All in all it 50 mm more compared to Oscar II, sufficient to deal against Armoured cruisers of the time, but a bit light to face contemporary battleships.

To propel these 7000 tons monsters, the machinery comprised four shafts coupled to Curtis turbines rated for 20,000 SHP total and 12 Yarrow-type coal-fired boilers. This figure was for the Sverige only. See the WW2 section for the two others (one had Westinghouse geared turbines rated for 22,000 SHP) and were upgraded in the interwar to oil-fired models.

Sverige in 1931
Sverige in 1931

Operational service
As said above, only HSwMS Sverige was ready to take part in WW1, being ordered in 1912, laid down in December 1912, launched in 3.5.1915, and completed in 10.5.1917 by Götaverken Gothenborg.
All three ships looked similar until reconstruction during the interwar and further wartime additions, but this is for the WW2 Swedish navy chapter. it’s hard to point out a pracise career of the Sverige as that point, since she only served actively in 1918, and her only sortie was to take the Aaland islands from the Russians in 1918 (see above).

Sverige 1917

Dimensions Length 120 x 18.6 x 6.25 m
Displacement 6850 tonnes, 7700 tonnes FL
Crew 427
Propulsion 4 shafts, Kockums-Curtis Turbines, 12 Yarrow boilers, 20,000 shp
Speed 22.5 knots as designed
Range 2720 nm at 14 knots
Armament 4 x283, 8 (1×2, 6×1)x 152, 2x 75, 2x 57, 2x 6.5mm MG, 2x 450mm TTs
Armor (max) Belt 200, Barbettes 150, turrets 200, sec turrets 125, decks 45-30 mm, CT 175mm

Sverige ww2

HSwMS Oscar II (1905)

Oscar II in 1914

Oscar II was one of the longest-living, active ship in the western hemisphere. This Pansarskepp, a development of the Äran class, was intended to carry a more powerful armament in order to outclass any enemy armoured cruiser, by also speed and protection (which was as good as any battleship). She was also the last coastal battleship in existence when she was broken up in 1974.
This was the most modern vessel in the swedish inventory when the war broke out in 1914.

She was a modernised and larger Äran class, displacing 4,273 and up to 4,584 long tons at full load. 95.6 m (313.6 ft) long, 15.4 m (50 ft 6 in) wide, with a 5.49 m (18 ft 0 in) draft, she carried nine officers for HQ purposes plus a normal crew of 342. Built at Lindholmens, Gothenburg for a cost of 3,390,000 crowns, she was launched on 10 June 1905 and completed, commissioned in 3 April 1907.

She was modernised four time First, in 1910 when receiving a tripod mast to mount a better rangefinder, gradual upgrades and in 1916 she received new high angle AA mounts for two 57 mm (2.2 in) guns. During the war she served as flagship, between firing and damage control exercises. She saw action during the invasion of Åland in 1918, 19 February, along with HMS Sverige to land and cover operations of a Marine contingent from the Vaxholm Coastal Artillery Regiment.

On 5 March she saw the German battleships Rheinland and Westfalen but staeyed there as a Swedish display of force, the last ship to leave the islands on 23 April. She was also decommissioned in September 1918 for a complete overhaul. Other modernisations intervened during the interwar and WW2, but’s for the Swedish WW2 navy section. She remained in service until February 1950 and afterwards the hulk, disarmed, still served for training until the mid-1970s.

Oscar II Armour scheme

The Oscar II was armed by two 210 mm (8.3 in) Bofors M/98 guns (like thosê of Aran) (which was less than the twin pairs of 254 mm of contemporary armoured cruisers, eight 152 mm (6 in) Bofors M/03 guns in twin turrets, ten 57 mm (2.2 in) Finspång M/89B guns, three 37 mm (1.5 in) Bofors M/98B guns and two 450 mm (18 in) torpedo tubes.

It was a clear improvement over the Aran, with especially it the lower decks. The belt was 67 m (219 ft 10 in) long (Schneider-Creusot) and 150 mm (5.9 in) midships with 125 mm (4.9 in) to 100 mm ends. The turrets were plated by 60 and 125 mm (2.4 and 4.9 in) thick Krupp armour. The citadel was 23 m (75 ft 6 in) long between the turrets, 100 mm (3.9 in) thick. Barbettes were 175 mm (6.9 in) thick. The main deck was 60 and 22 mm (2.4 and 0.9 in) thick. Conning towers were 157 mm (6.2 in) forward and 100 mm (3.9 in) aft. The bridge, upper deck were 10 and 57 mm (0.4 and 2.2 in) thick respectively. All in all it was better than many armoured cruisers, which compensated for the firepower.

The beating hart of Oscar II was a group of two Motala Verkstad four-cylinder, triple expansion engines. They drove two shafts, with a three-bladed propeller. Rated at 9,400 shp (7,000 kW) they were fed by ten 16.5 kg/m2 (3.4 lb/sq ft) water tube marine Yarrow boilers and separated in three watertight compartments. For this arrangement, the oscar II ended as the only three-funnelled coastal defence ship at the time. For range, she also carried 500 long tons (510 t) coal for about 3,550 nmi (6,570 km) at a cruise speed of 11 knots (20 km/h) reduced to 1,100 nmi when speeding up to 17.8 knots, which was about 33.0 km/h). On trials, she reached 18.14 knots (33.60 km/h).

Officers on deck while visiting the Tsar of Russia in 1912

Oscar II 1914

Dimensions Length 95.6 x 15.4 x 5.49 m
Displacement 4273 tonnes, 4584 tonnes FL
Crew 335
Propulsion 2 shafts, Motala VTE engines, 10 Yarrow boilers, 9500 shp
Speed 18 knots as designed
Range 3550 nm at 10 knots
Armament 2 x210, 8 (4×2)x 152, 10x 57, 3x 37mm, 2x 450mm TTs
Armor (max) Belt 150, Barbettes 175, turrets 190, sec turrets 125, decks 22, Fw CT 157mm

Oscar II WW2
Oscar II during WW2.

Äran class coastal battleships (1901)

colorized photo Aran

This class comprised the HSwMS Äran, Wasa, Tapperheten and Manligheten, which made the bulk of swedish coastal defensive screen in 1914. The second (HSwMS Vasa) was a famous name, dear to the hart of any Swede when thinking of the Navy. This was the largest warship in its time, back in the 1600s when the Swedish Navy was reaching its peak of power and Sweden was a major actor in European affairs.

Manligethen forecastle
Manligethen forecastle

This class of Pansarskepp were 87.48 m (287 ft 0 in) in lenght for 15 metres (49 ft 3 in) in beam, and 5 metres (16 ft 5 in) draught, better suited to shallow waters of this rea. This came with a displacement of 3,592 tons. All four ships were propelled by two shaft connected to reciprocating VTE engines rated at 6,500 indicated horsepower (4,800 kW). Tapperheten produced 550 hp, for 16.5 knots. Their Krupp cemented and KNC armour comprised a 7 in (18 cm) belt and 7.5 in (19 cm) thick armour plates on the turret. Main armament consisted in two 210/44 mm (8.2 in) bofors single turret guns and six single 150/44 mm bofors guns (6 in) plus ten 5.7 cm (2.2 in) Bofors QF guns, and the usual two submerged 457 mm (18 in) torpedo tubes. They differed from the previous Dristigethen (1900) in having the 6 in guns in turrets amidship and not in barbettes.
Their active life was spent in exercises, without notable fact to be reported here. Built at Bergsund, Finnboda, Kockums, Malmö (2 ships) and Lindholmens, Gothenborg, launched in 1902 to 1904, they served throught WW1 and the interwar, and were still active in WW2 after a thorough modernisation. To see these records, see the WW2 Swedish Navy section.

Äran class 1914

Dimensions Length 87.5 x 15 x 5 m
Displacement 3592 tonnes, 3900? tonnes FL
Crew 285
Propulsion 2 shafts, Motala? VTE engines, 8? boilers, 6500 shp
Speed 18 knots as designed
Range 3550 nm at 10 knots
Armament 2 x210/44, 6x 152/44, 10x 57, 10x 57mm QF (6 pdr), 2x 450mm TTs
Armor (max) Belt 7 in, turrets 7-1/2 in Krupp cemented and KNC armor

Manligethen WW2
Manligethen in WW2

HSwMS Dristigethen coastal battleship (1900)

Profile - Dristigethen
Conway’s profile of the HSwMS Dristigethen

This single coastal battleship preceded the Äran class and was a prototype in some way since the five ships shared a lot in common. HSwMS Dristigethen was launched at Lindholmen in 1900. She was slightly smaller than the Äran at 3445 tons standard with a slightly reduced machine power rated for 5400 hp, resulting in a 15.5 knots top speed. She could carry 5000 tons of coal. HSwMS Dristigethen was armed with about the same way the following Äran, two 210 mm Bofors naval guns in single turrets fore and aft, six Bofors 150mm, ten 6-pdr and two TTs, but the secondary 6-in guns were arranged in barbettes along the central battery and citadel.
Protection-wise, they received Harvey steel, with a 8 in strong belt (200 mm) and 6 to 8 in turrets (sides and front) or 150 to 200 mm.

HSwMS Dristigethen served during WW1, enforcing swedish Neutrality, and in 1924 she was rebuilt at an aircraft and repair depot ship anchored at Bergsund, Stockholm. Tonnage was reduced to 2218 tons standard (270 FL) after the removal of armour and main armament. She was rearmed during WW2 with four 75 mm AA, 2x 40 mm AA and four machine guns. See also the WW2 section.

Oden class coast defence ships (1897)

The first of these three ships was HSwMS Oden (launched at Bergsund in 1897), followed by HSwMS Thor (same yard, 1899) and HSwMS Niord at Lindholmen also in 1899. Armament-wide their main artillery was impressive, with two single 1 in/42 caliber guns (254 mm) and six 4.7 in (120 mm) secondary guns in barbettes, plus ten QF 6-pdr Bofors (47 mm) in single mounts to fight TBs and a single 450 mm (8 in) torpedo tube. They displaced 3445 tons standard, and were propelled by two 2 shaft reciprocating engines, VTE engines rated for 5350 ihp, giving them a top speed of 16.5 knots. The also carried 300 tons of coal.
Oden was originally armed with four 6-pdr and eight 3-pdr (47 and 37 mm). For protection, they all received a 9-1/2 in (240 mm) armored belt, and 8-in plating (203 mm) on their turrets. Oden had 10-in plating front of the turrets and Creusot rather than harvey steel like Thor and Niord. All three were active in WW1 without notable incident to be reported.

Oden class 1914

Dimensions Length 84.8 x 14.8 x 5.3 m
Displacement 3445 tonnes standard
Crew 254
Propulsion 2 shafts, VTE engines, 8? boilers, 5350 ihp
Speed 16.5 knots as designed
Armament 2 x254/42, 6x 120/45, 10x 57, 10x 57mm QF (6 pdr), 1x 450mm TT
Armor (max) Belt 9-1/2 in, turrets 10-8 in Harvey/Creusot armor

Svea class coast defence ships (1886)

HMS Svea

The Svea class of three ships were the most modern in the Swedish arsenal since 1871, which date saw the launch of a sea-going monitor, HMS Loke, close to the previous 1860s John Ericsson class. HMS Svea was launched at Lindhoklmen in 1886, followed by Göta same yard, 1891 and Thule in 1892. They were true sea-going coast defence ships with an admiship belt and two 10 in guns in a single turret. However in 1901-1904 they were completely rebuilt. Their new armament comprised a single 8.3 in /44 gun in a single 7-1/2 in thick KNC steel turret and seven 6-in guns in single turrets each side, plus 11 6-pdr light QF guns for TB warfare whereas the three original 380 mm TTs were deposed. All three had a stern projeted forward, but only Thule had an actual ram.

They displaced 3200 tons, for 75.7 metres (248 ft 4 in) in lenght, a draught of 5.18 metres (17 ft 0 in) and reciprocating engines rated for 4,700 ihp (3,500 kW) giving them 16 knots (30 km/h) top speed. Svea’s machinery actually was rated for 3640 ihp, giving 14.7 knots. They were protected by a belt ranging from 11-1/2 in in the central section, down to 8in at the ends. Their main initial turret was protected by 11-1/2 in thick Creusot steel (Svea had compound steel) on the front, and 9-1/2 in on the sides. All three were active during WW1, without notable issue. The new turrets has been forged and placed at Ellenabbsfortet (Aspö, a small island near Karlskrona) and the guns were removed in 1936 while the turrets were deposed and scrapped.

Svea profile
Profile of the Svea (Conways) after reconstruction, as of 1914.

Svea class 1914

Dimensions Length 75.7 x 14? x 5.18 m
Displacement 3200 tonnes standard
Crew 252
Propulsion 2 shafts, VTE engines, 8? boilers, 4700 ihp
Speed 16 knots as designed
Armament See notes – changed in 1902
Armor (max) 11.5 in (29 cm) belt, 11.5 in (29 cm) turret

Read More
wikipedia: List ships Swedish Navy
On fr.naval-encyclopedia.com
Sweden during WW1
Oscar II on navypedia.org