ship with a single torpedo in the stern at 04:49. Samuel Gompers, which was on a voyage from Nouméa to Newcastle, New South Wales, Australia, suffered an explosion and sank at 04:54 at . At about 14:00 on 9 February 1943, I-10 fired torpedoes at what she identified as an unescorted transport, but the torpedoes passed under the ship without exploding. At 05:42 on 10 February, she attacked another transport in the area, but failed to gain a good firing position and all her torpedoes missed. I-10 arrived off Auckland, New Zealand, on 14 February 1943 and off Wellington, New Zealand, on 16 February. On 22 February, Allied signals intelligence intercepted several of I-10′s transmissions and, based on them, estimated that I-10 was about to pass through the Cook Strait, not realizing that she had already transited the strait over a week earlier. A Royal New Zealand Air Force search for I-10 in the Cook Strait area found nothing. I-10 attacked a transport at 10:50 on 27 February 1943, but her torpedoes missed. On 1 March 1943, however, she succeeded in torpedoing the American 7,141-gross register ton tanker in the New Hebrides at . Gulfwave′s crew and United States Navy Armed Guard detachment suffered no casualties, and the tanker made port at Suva in the Fiji Islands under her own power. After reconnoitering the Torres Strait on 5 March, I-10 headed back to Truk, which she reached on 10 March 1943. March–June 1943 I-10 got underway from Truk on 15 March 1943 and set course for Sasebo, Japan, where she arrived on 21 March to undergo repairs. With them complete, she departed Sasebo on 17 May 1943 and made for the Seto Inland Sea for workups and where from 17 to 19 May she engaged in refueling exercises in the Iyo-nada with the submarine , which had been selected to carry out a Yanagi mission, a round-trip voyage between Japan and German-occupied France I-10 arrived at Kure on 26 May 1943. On 1 June 1943,I-10 departed Kure in company with I-8 and the submarine tender . The three vessels proceeded to Saeki Gulf, then departed Saeki Gulf on 2 June and made for Penang, where I-10 arrived on 12 June 1943 and was made flagship of Submarine Squadron 8. Fourth war patrol On 27 June 1943, I-10 departed Penang with the commander of Submarine Squadron 8, Rear Admiral Noboru Ishizaki,