to the Kurils and into the Sea of Okhotsk. She patrolled on both sides of the Kuril Island chain and across the shippung lanes leading to Soya Strait and to Yokosuka, Japan. She took periscope photographs of Japanese facilities on various islands and sighted several targets, but was unable to close on most of them and was unsuccessful against those she attacked. On 20 July 1943, she attacked what appeared to be an inter-island steamer but which turned out to be a Japanese warship that steamed straight down the torpedo track and dropped six depth charges in quick succession. S-30 went deep, reloaded, and prepared to reattack. The target, however, was lost in the fog. S-30 continued her patrol. On 27 July 1943, she fired three torpedoes at a Japanese merchant ship estimated at 7000 gross register tons. Her sound operator reported two hits, breaking-up noises, and distant depth charging, but the damage went unverified by postwar examination of Japanese records. On 31 July 1943, she attacked another cargo ship under similar circumstances and rported scoring one torpedo hit. Her sound operator reported that screw noises from the target stopped and that he heard breaking-up noises, and periscope observation showed no ship still afloat at the site of the attack. However, any damage which S-30 might have inflicted was never verified. S-30 departed the Kurils on 7 August 1943 and headed east. O 9 August 1943, she arrived in Massacre Bay on Attu, which U.S. forces had retaken from the Japanese in May 1943 during the Battle of Attu. Ninth war patrol S-30 departed Massacre Bay on 26 August 1943 to begin her ninth and final war patrol. During the patrol, she operated along the eastern and western sides of the Kuril Islands. Again, she lost several targets in fog, nut nevertheless took photographs of the islands. In mid-September 1943, she added a new dimension to her activities when attempted to bombard the Japanese garrison on Matsuwa. Fog interfered with her first attempt to shell Matsuwa, but it cleared off early on the morning of 15 September 1943 (local date) as she neared the firing point with her crew at battle stations. When the order to fire was given, however, the gun failed to respond. Her crew attempted to install a new firing pin, but it was a fraction of an inch too short, and she had to abandon her