November in the Straits of Malacca by the British submarine HMS Taurus. In November 1943 departed Kure for Singapore to pick up a cargo of tin, tungsten, zinc, rubber and quinine. She departed Singapore in December 1943 for Nazi-occupied France, and reached the Bay of Biscay in March 1944. She was escorted by German warships and aircraft and came under heavy attack by Allied aircraft, but arrived safely at Lorient. I-29 departed Lorient in April 1944 with considerable German technology, including a Walter rocket engine and plans for the jet-powered Me 262 and the rocket-powered Me 163. She arrived at Singapore in July, but was sunk with her cargo en route to Japan in the Luzon Strait by the American submarine USS Sawfish on 26 July 1944. In March 1944 left Kure with a cargo of metals, including gold, and a team of technicians who were to study German anti-aircraft techniques, stopping at Singapore to pick up other cargo, including rubber and opium. I-52 reached the South Atlantic and successfully rendezvoused with U-530 from Lorient on 23 June to embark a German liaison officer, two radio operators, the current German naval code and a Naxos radar detector. However, that night she was detected by radar-equipped Grumman TBF Avenger aircraft from an American hunter-killer group centered on the escort carrier USS Bogue, which dropped sonobuoys and "Fido" homing torpedoes, sinking I-52 with all hands (95 crew, 14 passengers and the three German sailors) near , west of the Cape Verde Islands. It is believed that on her return voyage to Japan she would have been carrying uranium oxide. I-52's voyage was the last Yanagi mission undertaken by the IJN. Reciprocal voyages The German U-boat arm made several reciprocal exchange voyages, though these were outside the Yanagi scheme; they also made a number of blockade-running voyages, also separate from the Yanagi missions. From February to June 1943 sailed to the Indian Ocean from Kiel, meeting with I-29 in the Mozambique Channel. U-180 transferred Subash Chandra Bose, future leader of the Indian National Army, and received two tons of gold picked up from Penang in payment for German goods so far received. In May 1943 sailed for Japan from Lorient, arriving in Kure in August. Code-named 'Marco Polo I' she was transferred to the IJN as an exchange in submarine technology, and was commissioned by them as RO-500. In February 1944 , code-named