14 August 1904 - The naval Battle off Ulsan - sinking of russian armed cruiser Rurik
(Japanese: 蔚山沖海戦 
Urusan'oki kaisen; Russian: Бой в Корейском проливе, 
Boi v Koreiskom prolive), also known as the 
Battle of the Japanese Sea or 
Battle of the Korean Strait, took place on 14 August 1904 between cruiser squadrons of the 
Imperial Russian Navy and the 
Imperial Japanese Navy during the 
Russo-Japanese War, four days after the 
Battle of the Yellow Sea.
 Sinking of the "Leulic", 14 Aug. Sinking of the Russian cruiser Rurik in the Battle off Ulsan during the Russo-Japanese War, 1904, from a contemporary propaganda postcard
Background
Sinking of the "Leulic", 14 Aug. Sinking of the Russian cruiser Rurik in the Battle off Ulsan during the Russo-Japanese War, 1904, from a contemporary propaganda postcard
Background
At the start of the Russo-Japanese War, the bulk of the 
Russian Pacific Fleet was 
blockaded within the confines of 
Port Arthur by the 
Imperial Japanese Navy. However, the Russian subsidiary naval base at Vladivostok, although shelled by a Japanese squadron under the command of Vice Admiral 
Dewa Shigetō in March 1904, remained largely undamaged. Located at Vladivostok was a garrison force consisting of the light cruiser 
Bogatyr and auxiliary cruiser 
Lena and a stronger Vladivostok Independent Cruiser Squadron consisting of the 
armored cruisers Rossia, Rurik, and Gromoboi. This force was under the command of Rear Admiral 
Karl Jessen from 15 March – 12 June 1904, Vice Admiral 
Petr Bezobrazov from 12 June – 16 October 1904 and from Jessen again from 15 October 1904 until the end of the war.

Rurik

Simplified diagrams of the Rurik, as depicted in 
Brassey's Naval Annual 1902
 
  
Russian armored cruiser Rossia after her 1906 rebuild / The Imperial Russian armoured cruiser 
Gromoboy 
Commerce raiding operations
The Vladivostok Independent Cruiser Squadron made a total of six sorties from Vladivostok for 
commerce raiding in 1904, sinking a total of 15 transports. The first raid was from 9 to 14 February along the coast of Japan, in which a single transport was sunk. The second was from 24 February to 1 March along the coast of Korea without any results. However, during the third raid from 23 to 27 April, the Russian squadron ambushed Japanese troop transports approaching 
Gensan in Korea, causing considerable damage. The fourth raid from 12 to 19 June sank several transports in the 
Tsushima Strait in what was called the "
Hitachi Maru Incident", and resulted in the capture of a British transport, 
Allantown. This was followed by the fifth raid from 28 June – 3 July, again in the Tsushima Strait, in which the British transport 
Cheltenham was captured. Finally on 17 July to 1 August, the Russian squadron raided the Pacific coast of Japan, sinking one British and one German freighter. As a result of these operations, the Japanese were forced to assign the 
IJN 2nd Fleet under the command of Vice Admiral 
Kamimura Hikonojō with considerable resources in an attempt to locate and destroy the Russian squadron. Kamimura's failure to do so on several occasions created considerable adverse public comment in Japan.
Sortie
A telegram from the First Pacific Squadron at Port Arthur reached Vladivostok on the afternoon of 11 August 1904, stating that Admiral 
Wilgelm Vitgeft had decided to attempt to break through the Japanese 
blockade, and therefore Vice Admiral Jessen was ordered to sortie the Vladivostok Cruiser Squadron to assist. However, as late as 5 August 1904, a telegram had been received from Vitgeft stating his intention to perish with Port Arthur, so the Vladivostok cruisers took time to get ready for action. Owing to the delay in sailing, there was little hope of being able to assist the First Pacific Squadron at the critical passage of the Tsushima Straits; however on the assumption that Vitgeft would be successful, the two squadrons planned to rendezvous in the 
Sea of Japan.
The warships of the Vladivostok Cruiser Squadron formed in a line abreast at intervals of 4 
nautical miles (7.4 km) and headed southward at 14 knots (26 km/h), in hourly expectation of sighting the Port Arthur Squadron. However, the Port Arthur Squadron had not been sighted by the following morning. As the Vladivostok Cruiser Squadron approached 
Busan, Jessen advised his captains that he had no intention of attempting to pass Tsushima Straits, and ordered the squadron back to Vladivostok.
The Japanese 2nd Fleet under Admiral Kamimura was made up of four armored cruisers 
Izumo, 
Azuma, 
Tokiwa, 
Iwate, and two 
protected cruisers Naniwa and 
Takachiho. The Japanese squadron had passed very close to the Russian squadron in the dark of the previous night on opposite courses but neither was aware of the other. From 01:30 on 14 August 1904, Kamimura had been heading back from his night patrol area on a course that took him directly to the Russian squadron. When Jessen started his turn back to Vladivostok, he sighted the four Japanese armored cruisers.
 
  
  Japanese cruiser Izumo /  Japanese cruiser Azuma / Japanese cruiser Tokiwa
Japanese cruiser Izumo /  Japanese cruiser Azuma / Japanese cruiser Tokiwa
The situation was ideal for the Japanese side. It was dawn on a fine summer day, and the enemy was as far from Vladivostok as it was possible to be in the Sea of Japan, with the Japanese squadron between themselves and their distant base.
The battle
At 05:20 on 14 August 1904 the fleets had closed to 7,800 metres (25,600 ft), and the Japanese opened fire first. For unknown reasons, Kamimura ordered fire concentrated on 
Rurik, the last and weakest in the Russian column. Subjected to twice the bombardment administered to her stronger comrades, 
Rurik lost most of her officers in a short time, and although extremely damaged, remained afloat, the diminishing number of survivors continuing to fire the few remaining guns until the very last, in a gallant display of classic heroism that won the admiration of the Japanese.
On the easterly run the Japanese ships took some hits, but nothing comparable to what they inflicted. It was assumed that when the Russians sheered away, Kamimura would have pressed his advantage closer. Inexplicably, this did not happen. Kamimura oddly held his course during the Russian turn, and when he ordered his forces to turn a few minutes later, it was to a new tack that actually lengthened rather than narrowed the range.
The remaining Russian cruisers tried to cover 
Rurik, but with increasing damage, Jessen decided at 08:30 to scuttle 
Rurik, and save his other ships by heading back towards Vladivostok. The Japanese cruisers pursued for some time, and firing continued, with more damage to the Russian cruisers and slight damage to 
Iwate and 
Azuma. The Russians were in a far worse condition than the Japanese, but Kamimura then made another controversial decision: after pursuit of only three hours, while still on the high seas, and with long daylight steaming hours between the Japanese cruisers and Vladivostok, at 11:15 he broke off the chase, and turned back towards Busan.
Despite Kamimura's failure to destroy the two remaining Russian cruisers, he was hailed as a hero in Japan. Although two of the three Russian cruisers escaped, their damage was greater than what the limited repair facilities at Vladivostok could handle, and the Vladivostok Cruiser Squadron never threatened Japanese shipping again.
 Rurik
Rurik in 1904 with cut down rig
Russian point of view
From the Imperial Russian Navy's point of view, 
Rurik was scuttled by her own crew, not by Admiral Jessen's decision. 
Rurik was hit by a shell in her unarmored stern and the steering mechanism was destroyed, immobilizing her rudder in an elevated position. So the maximum speed of 
Rurik had been greatly reduced and her steering had to be performed by reducing the revolutions of each one of her propellers. Jessen successfully diverted all four Japanese armored cruisers and hoped that 
Rurik could stand against 
Naniwa and 
Takachiho. However, the condition of 
Rurik was rather bad. First Rank Captain Trusov, her commander, and all senior officers were killed. Finally, Lieutenant Ivanov (the thirteenth in command) ordered 
Rurik to be scuttled.
 
  
Built by Jim Baumann (
http://www.steelnavy.com/CombrigRurikJB.htm)
Rossia and 
Gromoboi successfully repelled the attack of Kamimura's cruisers at the price of sustaining heavy damage, but IRN sailors, while still under fire, were able to repair the main 203 mm (8 in) guns and continue to engage with them. Faced with an increasing rate of fire from the Russian cruisers and with his ammunition supplies nearly depleted, Admiral Kamimura decided to stop pursuit.
The very heavy Russian casualties suffered in the battle were the result of two factors: the bursting charges in Japanese shells was 
picric acid (trinitrophenol) which on detonation turned the shells into very large numbers of fragments. Additionally the Russian ships lacked protective 
gun shields for the crews.
Order of battle
Ship order is according to their position in line
Russia
Vladivostok Cruiser Force - Rear Admiral Karl Jessen:
Japan
2nd Fleet - Vice Admiral 
Kamimura Hikonojō
- 2nd Unit: armored cruisers:
- Izumo, flagship, slightly damaged; 20 hits, 2 KIA, 17 WIA.
- Azuma, slightly damaged; 10 hits, 8 WIA.
- Tokiwa, slightly damaged; few hits, 3 WIA.
- Iwate, slightly damaged; over 10 hits, 40 KIA, 47 WIA.
 
- 4th Unit: protected cruisers:
https://en.wikipedia.org/wiki/Battle_off_Ulsan
https://en.wikipedia.org/wiki/Russian_cruiser_Rurik_(1892)