down the torpedo tracks to hover over Picuda and she was shaken by 26 exploding depth charges before she escaped. With only one torpedo worth firing she returned to Midway Island on 5 April. Upon completion of her refit, she took aboard student officers and men for indoctrination training exercises off Midway, from 28 to 30 April. Three days later she formed a wolf-pack with submarines and . Picuda put to sea from Midway with the wolf-pack 4 May to conduct her second war patrol in waters off Formosa. On 22 May, she sent four bow shots streaking to sink 1200-ton river gunboat Hashidate. She also severely damaged 3172-ton cargo ship Tsukauba Maru with the same salvo. The latter enemy was polished off by land-based aircraft from the United States Army Air Corps the following day. On 2 June, Picuda closed a convoy of twelve ships hugging the coast of Formosa. After sending her contact report to the other submarines of her wolf-pack, she slipped between two of the three leading escorts and pressed home an attack on a large tanker. Three hits were heard as all escorts made for Picuda. She skillfully maneuvered clear and sustained no damage from the many depth charges which exploded on all sides and above from eight enemy vessels during the next hour. She continued to patrol the Formosa coast until 4 June then passed off Batan Island and eastward of the Nansei Shoto to a point northward of Chichi Jima by 14 June. Two days later she pointed her bow for Midway where she arrived 22 June. She put to sea the next day to arrive at Pearl Harbor 27 June. After the end of the second war patrol, Raborn was replaced as skipper of Picuda by Commander Glynn R. Donaho. Picuda, in wolf-pack with sister ships and , departed Pearl Harbor for her third war patrol 23 July in waters of the Luzon Strait between Formosa and Luzon. On 25 August, Picuda spotted ten ships hugging the coast some off the beach of Luzon. Slipping past five escorts, and with three enemy patrol planes overhead, she sent six torpedoes streaking to sink 1943-ton cargo ship Kotoku Maru, then skillfully maneuvered for a down-the-throat shot that spelled the doom of 1270 ton pursuing . Picuda probed deeper in the interior of Luzon Strait on 16 September, for a bold daylight attack on an