Japanese submarine I-30
Encyclopedia
I-30 was a Type B1 submarine of the Imperial Japanese Navy
Imperial Japanese Navy
The Imperial Japanese Navy was the navy of the Empire of Japan from 1869 until 1947, when it was dissolved following Japan's constitutional renunciation of the use of force as a means of settling international disputes...
during World War II. After operating in the Indian Ocean
Indian Ocean
The Indian Ocean is the third largest of the world's oceanic divisions, covering approximately 20% of the water on the Earth's surface. It is bounded on the north by the Indian Subcontinent and Arabian Peninsula ; on the west by eastern Africa; on the east by Indochina, the Sunda Islands, and...
she participated in a Yanagi mission, aimed at connecting Japan and Nazi Germany
Nazi Germany
Nazi Germany , also known as the Third Reich , but officially called German Reich from 1933 to 1943 and Greater German Reich from 26 June 1943 onward, is the name commonly used to refer to the state of Germany from 1933 to 1945, when it was a totalitarian dictatorship ruled by...
by submarine. She was the first Japanese submarine to reach Europe, arriving at Lorient
Lorient
Lorient, or L'Orient, is a commune and a seaport in the Morbihan department in Brittany in north-western France.-History:At the beginning of the 17th century, merchants who were trading with India had established warehouses in Port-Louis...
, France
France
The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...
in August 1942. I-30 returned to Singapore
Singapore
Singapore , officially the Republic of Singapore, is a Southeast Asian city-state off the southern tip of the Malay Peninsula, north of the equator. An island country made up of 63 islands, it is separated from Malaysia by the Straits of Johor to its north and from Indonesia's Riau Islands by the...
loaded with military technology and information, but hit a mine outside the harbour and sank. Only part of her cargo was salvaged.
Service history
The submarine was laid down at the Kure Naval ArsenalKure Naval Arsenal
was one of four principal naval shipyards owned and operated by the Imperial Japanese Navy. -History:The Kure Naval District was established at Kure, Hiroshima in 1889, as the second of the naval districts responsible for the defense of the Japanese home islands along with the establishment of the...
on 7 June 1939, launched on 17 September 1940, completed on 28 February 1942, and commissioned with Commander Endo Shinobu in command.
Indian Ocean operations
On 27 March 1942 the German KriegsmarineKriegsmarine
The Kriegsmarine was the name of the German Navy during the Nazi regime . It superseded the Kaiserliche Marine of World War I and the post-war Reichsmarine. The Kriegsmarine was one of three official branches of the Wehrmacht, the unified armed forces of Nazi Germany.The Kriegsmarine grew rapidly...
naval staff requested that the Imperial Navy launch operations against Allied convoys in the Indian Ocean
Indian Ocean
The Indian Ocean is the third largest of the world's oceanic divisions, covering approximately 20% of the water on the Earth's surface. It is bounded on the north by the Indian Subcontinent and Arabian Peninsula ; on the west by eastern Africa; on the east by Indochina, the Sunda Islands, and...
, and on 8 April the Japanese agreed to dispatch a detachment of submarines to the East Coast of Africa. Submarine Squadron 8's 1st Division was withdrawn from its base at Kwajalein
Kwajalein
Kwajalein Atoll , is part of the Republic of the Marshall Islands . The southernmost and largest island in the atoll is named Kwajalein Island. English-speaking residents of the U.S...
in the Marshall Islands
Marshall Islands
The Republic of the Marshall Islands , , is a Micronesian nation of atolls and islands in the middle of the Pacific Ocean, just west of the International Date Line and just north of the Equator. As of July 2011 the population was 67,182...
and assigned the task.
On 11 April, I-30 departed Kure
Kure
Kure can refer to:*KURE, a radio station in Ames, Iowa*Kure Software Koubou, Japanese video game development company*Kure, Hiroshima , a city in Hiroshima prefecture, Japan**Kure Line, a rail line in the city...
for Penang
Penang
Penang is a state in Malaysia and the name of its constituent island, located on the northwest coast of Peninsular Malaysia by the Strait of Malacca. It is bordered by Kedah in the north and east, and Perak in the south. Penang is the second smallest Malaysian state in area after Perlis, and the...
, Malaya, arriving on the 20th. Two days later she sailed from Penang accompanied by the auxiliary cruiser and supply ship Aikoku Maru to reconnoitre selected points on the East African coast for possible attack. In May I-30 sailed along the coast of Africa, launching its Yokosuka E14Y
Yokosuka E14Y
|-See also:-References:NotesBibliography* Francillon, Ph.D., René J. Japanese Aircraft of the Pacific War. London: Putnam & Company Ltd., 1979. ISBN 0-370-30251-6....
floatplane
Floatplane
A floatplane is a type of seaplane, with slender pontoons mounted under the fuselage; only the floats of a floatplane normally come into contact with water, with the fuselage remaining above water...
on a series of reconnaissance flights over Aden
Aden
Aden is a seaport city in Yemen, located by the eastern approach to the Red Sea , some 170 kilometres east of Bab-el-Mandeb. Its population is approximately 800,000. Aden's ancient, natural harbour lies in the crater of an extinct volcano which now forms a peninsula, joined to the mainland by a...
, Zanzibar
Zanzibar
Zanzibar ,Persian: زنگبار, from suffix bār: "coast" and Zangi: "bruin" ; is a semi-autonomous part of Tanzania, in East Africa. It comprises the Zanzibar Archipelago in the Indian Ocean, off the coast of the mainland, and consists of numerous small islands and two large ones: Unguja , and Pemba...
, Dar es Salaam
Dar es Salaam
Dar es Salaam , formerly Mzizima, is the largest city in Tanzania. It is also the country's richest city and a regionally important economic centre. Dar es Salaam is actually an administrative province within Tanzania, and consists of three local government areas or administrative districts: ...
, and Durban
Durban
Durban is the largest city in the South African province of KwaZulu-Natal and the third largest city in South Africa. It forms part of the eThekwini metropolitan municipality. Durban is famous for being the busiest port in South Africa. It is also seen as one of the major centres of tourism...
, East London, Port Elizabeth and Simon's Town
Simon's Town
Simon's Town , sometimes spelled Simonstown; is a town in South Africa, near Cape Town which is home to the South African Navy. It is located on the shores of False Bay, on the eastern side of the Cape Peninsula. For more than two centuries it has been an important naval base and harbour...
in South Africa
Union of South Africa
The Union of South Africa is the historic predecessor to the present-day Republic of South Africa. It came into being on 31 May 1910 with the unification of the previously separate colonies of the Cape, Natal, Transvaal and the Orange Free State...
searching for targets.
On the night of 29 May I-30 she sent her aircraft to the harbour of Diego Suarez
Antsiranana
Antsiranana , named Diego-Suarez prior to 1975, is a city at the northern tip of Madagascar.Antsiranana is the capital of Diana Region.-Transports:...
at the northern tip of Madagascar
Madagascar
The Republic of Madagascar is an island country located in the Indian Ocean off the southeastern coast of Africa...
, which was occupied by the British
Battle of Madagascar
The Battle of Madagascar was the Allied campaign to capture Vichy-French-controlled Madagascar during World War II. It began on 5 May 1942. Fighting did not cease until 6 November.-Geo-political:...
. The aircraft sighted the battleship at anchor in the bay, along with the destroyers and , corvettes and , troopship Karanja, hospital ship Atlantis, tanker British Loyalty, merchant ship Llandaff Castle, and an ammunition ship. The next night the Type C submarines I-16 and I-20 launched their Ko-hyoteki midget submarine
Ko-hyoteki class submarine
The class was a class of Japanese midget submarines used during World War II. They had hull numbers but no names. For simplicity, they are most often referred to by the hull number of the mother submarine...
s about 10 miles from the harbour. At 20:25, one torpedoed and damaged the Ramillies. The corvettes counter-attacked with depth charges, but at 21:20 the midget from I-20 torpedoed and sank the British Loyalty. The I-16s midget submarine went missing, presumed sunk, while the I-20s beached further along the coast. Its two crewmen were discovered by Royal Marines
Royal Marines
The Corps of Her Majesty's Royal Marines, commonly just referred to as the Royal Marines , are the marine corps and amphibious infantry of the United Kingdom and, along with the Royal Navy and Royal Fleet Auxiliary, form the Naval Service...
, and in the ensuing firefight both were killed.
Voyage to Europe
In mid-June 1942 I-30 was sent on a Yanagi mission to Europe, rounding the Cape of Good HopeCape of Good Hope
The Cape of Good Hope is a rocky headland on the Atlantic coast of the Cape Peninsula, South Africa.There is a misconception that the Cape of Good Hope is the southern tip of Africa, because it was once believed to be the dividing point between the Atlantic and Indian Oceans. In fact, the...
and entering the Atlantic en route to France. On 2 August she arrived in the Bay of Biscay
Bay of Biscay
The Bay of Biscay is a gulf of the northeast Atlantic Ocean located south of the Celtic Sea. It lies along the western coast of France from Brest south to the Spanish border, and the northern coast of Spain west to Cape Ortegal, and is named in English after the province of Biscay, in the Spanish...
and was escorted into Lorient
Lorient
Lorient, or L'Orient, is a commune and a seaport in the Morbihan department in Brittany in north-western France.-History:At the beginning of the 17th century, merchants who were trading with India had established warehouses in Port-Louis...
by a powerful force of German M-class minesweepers
M class minesweeper (Germany)
The M class were the standard minesweeper of the German Navy during World War II.-M1935:The first series; the M1935 were ordered in the late 1930s to replace worn out World War I vintage boats. These ships proved versatile and seaworthy. The vessels could also undertake convoy escort,...
and Luftwaffe Junkers Ju 88
Junkers Ju 88
The Junkers Ju 88 was a World War II German Luftwaffe twin-engine, multi-role aircraft. Designed by Hugo Junkers' company through the services of two American aviation engineers in the mid-1930s, it suffered from a number of technical problems during the later stages of its development and early...
bombers. I-30 was the first Japanese submarine to arrive in Europe during World War II.
The officers and crew of I-30 were greeted by 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:...
Erich Raeder
Erich Raeder
Erich Johann Albert Raeder was a naval leader in Germany before and during World War II. Raeder attained the highest possible naval rank—that of Großadmiral — in 1939, becoming the first person to hold that rank since Alfred von Tirpitz...
, Admiral Karl Dönitz
Karl Dönitz
Karl Dönitz was a German naval commander during World War II. He started his career in the German Navy during World War I. In 1918, while he was in command of , the submarine was sunk by British forces and Dönitz was taken prisoner...
, and Captain Yokoi Tadao, the Japanese Naval Attaché to Germany. The officers and crew of I-30 were feted by their German allies, travelling to Berlin where Commander Endo was presented to Adolf Hitler
Adolf Hitler
Adolf Hitler was an Austrian-born German politician and the leader of the National Socialist German Workers Party , commonly referred to as the Nazi Party). He was Chancellor of Germany from 1933 to 1945, and head of state from 1934 to 1945...
, and returning to Lorient via a sightseeing trip to Paris
Paris
Paris is the capital and largest city in France, situated on the river Seine, in northern France, at the heart of the Île-de-France region...
. In the meantime the I-30s cargo of 3300 lb (1,496.9 kg) of mica
Mica
The mica group of sheet silicate minerals includes several closely related materials having highly perfect basal cleavage. All are monoclinic, with a tendency towards pseudohexagonal crystals, and are similar in chemical composition...
and 1452 lb (658.6 kg) of shellac
Shellac
Shellac is a resin secreted by the female lac bug, on trees in the forests of India and Thailand. It is processed and sold as dry flakes , which are dissolved in ethyl alcohol to make liquid shellac, which is used as a brush-on colorant, food glaze and wood finish...
was unloaded. They also supplied the Germans with blueprint
Blueprint
A blueprint is a type of paper-based reproduction usually of a technical drawing, documenting an architecture or an engineering design. More generally, the term "blueprint" has come to be used to refer to any detailed plan....
s of the Type 91
Type 91 torpedo
The Type 91 was an aerial torpedo of the Imperial Japanese Navy which was designed to be launched from an aircraft. It was used in the naval battles of carrier task forces in World War II.The Type 91 aerial torpedo rev.2 won the admiration of the world...
aerial torpedo
Aerial torpedo
The aerial torpedo, airborne torpedo or air-dropped torpedo is a naval weapon, the torpedo, designed to be dropped into water from an aircraft after which it propels itself to the target. First used in World War I, air-dropped torpedoes were used extensively in World War II, and remain in limited...
. In return I-30 was repainted U-boat grey and fitted with a Metox
Metox
The Metox, named after its manufacturer, was a pioneering high frequency very sensitive radar warning receiver manufactured by a small French company in occupied Paris, which could detect ASV transmissions from patrolling Allied aircraft. It is not clear whether the design was German or French or...
radar detector and a Flakvierling 38
2 cm FlaK 30
The Flak 30 and improved Flak 38 were 20 mm anti-aircraft guns used by various German forces throughout the Second World War. It was not only the primary German light anti-aircraft gun, but by far the most numerously produced German artillery piece throughout the war...
quad 20 mm AA gun, replacing her Type 96 25 mm AA guns.
I-30 departed Lorient on 22 August carrying a Japanese engineer as a passenger. Her cargo included blueprints of the Würzburg air defense ground radar
Würzburg radar
The Würzburg radar was the primary ground-based gun laying radar for both the Luftwaffe and the German Army during World War II. Initial development took place before the war, entering service in 1940. Eventually over 4,000 Würzburgs of various models were produced...
, five German G7a
G7a torpedo
The G7a or G7a/T1 was the standard issue Kriegsmarine torpedo during the early years of World War II.- Design :The torpedo was 53.3cm in diameter, 7.163 m in length, and with a warhead of 280 kg of Hexanite, and was standard issue for all U-boats of the war.The torpedo was of a straight-running...
and three G7e torpedo
G7e torpedo
The G7e or more appropriately the G7e/T2, G7e/T3, and G7e/T4 Falke torpedoes were, with the exception of the T4 model, the standard torpedoes for Germany during World War II...
es, five Torpedovorhalterechner (torpedo data computers), 240 Bolde sonar countermeasure rounds, rocket and glider bombs, anti-tank guns, a Zeiss anti-aircraft artillery director (fire control system), two hundred 20 mm AA guns, industrial diamonds
Diamond
In mineralogy, diamond is an allotrope of carbon, where the carbon atoms are arranged in a variation of the face-centered cubic crystal structure called a diamond lattice. Diamond is less stable than graphite, but the conversion rate from diamond to graphite is negligible at ambient conditions...
valued at one million yen
Japanese yen
The is the official currency of Japan. It is the third most traded currency in the foreign exchange market after the United States dollar and the euro. It is also widely used as a reserve currency after the U.S. dollar, the euro and the pound sterling...
, and fifty Enigma T
Enigma machine
An Enigma machine is any of a family of related electro-mechanical rotor cipher machines used for the encryption and decryption of secret messages. Enigma was invented by German engineer Arthur Scherbius at the end of World War I...
coding machines.
Sinking
On 8 October 1942 I-30 arrived at Penang to refuel and replenish, then sailed for SingaporeSingapore
Singapore , officially the Republic of Singapore, is a Southeast Asian city-state off the southern tip of the Malay Peninsula, north of the equator. An island country made up of 63 islands, it is separated from Malaysia by the Straits of Johor to its north and from Indonesia's Riau Islands by the...
, arriving early on the 13th. Just after 4 p.m. the same day she departed for Japan, but three miles east of Keppel Harbour
Keppel Harbour
Keppel Harbour is a stretch of water in Singapore between the mainland and the southern islands of Pulau Brani and Sentosa. Its naturally sheltered and deep waters was to meet the requirements of British colonists attempting to establish a Far East maritime colony in that part of the world, and...
hit a British mine and quickly sank, with the loss of 13 men. Divers from No. 101 Navy Repair Unit recovered some of her cargo, including most of the 20 mm guns, torpedo data computers, and the radar blueprints, though they were found to be rendered unusable after their immersion in salt water.
Between August 1959 and February 1960 the wreck was salvaged and then scrapped by Hokusei Sempaku Kogyo K.K.