the same day, she departed for Japan, but three miles east of Keppel Harbour hit a British mine and quickly sank with the loss of 13 men. On 8 October 1942 I-30 arrived at Penang to refuel and replenish, then sailed for Singapore, arriving early on the 13th. Her cargo included blueprints and a full set of the Würzburg air defense ground radar, five German G7a and three G7e torpedoes, 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 valued at one million yen, and fifty Enigma T coding machines. I-30 departed Lorient on 22 August carrying a Japanese engineer as a passenger. In return I-30 was repainted U-boat grey and fitted with a Metox radar detector and a Flakvierling 38 quad 20 mm AA gun, replacing her Type 96 25 mm AA guns. They also supplied the Germans with blueprints of the Type 91 aerial torpedo. In the meantime the I-30 's cargo of 1,500 kg (3,300 lb) of mica and 650 kg (1,430 lb) of shellac was unloaded. The officers and crew of I-30 were feted by their German allies, travelling to Berlin where Commander Endo was presented to Adolf Hitler, and returning to Lorient via a sightseeing trip to Paris. The officers and crew of I-30 were greeted by Grossadmiral Erich Raeder, Admiral Karl Dönitz, and Captain Yokoi Tadao, the Japanese Naval Attaché to Germany. I-30 was the first Japanese submarine to arrive in Europe during World War II. On 2 August she arrived in the Bay of Biscay and was escorted into Lorient by a powerful force of German M-class minesweepers and Luftwaffe Junkers Ju 88 bombers. In mid-June 1942 I-30 was sent on a Yanagi mission to Europe, rounding the Cape of Good Hope and entering the Atlantic en route to France. Its two crewmen were discovered by Royal Marines, and in the ensuing firefight both were killed. The I-16 's midget submarine went missing, presumed sunk, while the I-20 's beached further along the coast. The corvettes counter-attacked with depth charges, but at 21:20 the midget from I-20 torpedoed and sank the British Loyalty. At 20:25, one torpedoed and damaged the Ramillies. The next night the Type C submarines I-16 and I-20 launched their Ko-hyoteki midget submarines about 10 miles from the harbour. The aircraft sighted the battleship HMS Ramillies at anchor in the bay, along with the destroyers Duncan and Active, corvettes Genista and Thyme, troopship Karanja, hospital ship Atlantis, tanker British Loyalty, merchant ship Llandaff Castle, and an ammunition ship. On the night of 29 May I-30 she sent her aircraft to the harbour of Diego Suarez at the northern tip of Madagascar, which was occupied by the British. In May I-30 sailed along the coast of Africa, launching its Yokosuka E14Y floatplane on a series of reconnaissance flights over Aden, Zanzibar, Dar es Salaam, and Durban, East London, Port Elizabeth and Simon's Town in South Africa searching for targets. 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. On 11 April, I-30 departed Kure for Penang, Malaya, arriving on the 20th. Submarine Squadron 8's 1st Division was withdrawn from its base at Kwajalein in the Marshall Islands and assigned the task. On 27 March 1942 the German Kriegsmarine naval staff requested that the Imperial Navy launch operations against Allied convoys in the Indian Ocean, and on 8 April the Japanese agreed to dispatch a detachment of submarines to the East Coast of Africa. The submarine was laid down at the Kure Naval Arsenal on 7 June 1939, launched on 17 September 1940, completed on 28 February 1942, and commissioned with Commander Endo Shinobu in command. I-30 returned to Singapore loaded with military technology and information, but hit a mine outside the harbour and sank. She was the first Japanese submarine to reach Europe, arriving at Lorient, France in August 1942. After operating in the Indian Ocean she participated in a Yanagi mission, aimed at connecting Japan and Nazi Germany by submarine. I-30 was a Type B1 submarine of the Imperial Japanese Navy during World War II. 1 × 14 cm/40 11th Year Type naval gun.Sunk by mine, 13 October 1942, later salvaged and scrapped, 1959-1960
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