and, at 2044, she fired three torpedoes at another merchant ship, the Shoyo Maru. One torpedo hit, starting a fire aft. Sea Dog pulled away, watched, then moved in for the coup de grace. Two more torpedoes were fired, one ran erratic; the second hit amidships. The target exploded; her bow broke off; and her stern assumed a 60-degree down angle. Soon afterward, Sea Dog cleared the Niigata area and headed north to patrol off Sakata and Akita. On 10 June, she closed Oga Hanto, and that night she patrolled northwest of Kisakata and northeast of Tobishima, Minato Island. On 11 June, she returned to the vicinity of Oga Hanto. Shortly after 1300, she made contact with another coastal freighter, surfaced, and commenced running west and north to intercept. At 1519, she dived. At 1555, she fired one torpedo. Forty-three seconds later, the torpedo hit; and the target, cargo ship Kofuku Maru, broke in two, up-ending both the bow and the stern.Sea Dog resumed her patrol to the southward. That night, she took up station to the north of Nyudozaki and, at 0635 on 12 June, sighted a small convoy as it rounded that headland and continued northward, through relatively shallow waters, toward Henashi Zaki. Sea Dog fired on the freighter farthest from the coast. Shinson Maru broke in two and sank in about two minutes. Her companions moved even closer to the coast. Sea Dog headed for deeper water and patrolled to the southwest. On 13 June, Sea Dog was still off Oga Hanto. That evening, the starboard mine clearing cable, installed during the previous refit at Guam, parted and fouled the starboard screw. Sea Dog cleared the Japanese coast and stopped, lying-to while attempts were made to get divers down. Leaks in the face mask of the shallow water diving outfit, however, proved impossible to repair; and, soon after 0130 on 14 June, the submarine got underway. The noise and vibration from the starboard shaft was found to occur only for short periods at low speeds. At high speeds, its performance was satisfactory, and Sea Dog resumed her patrol, setting a southwest course for a surface patrol across the approaches to Akita, Sakata, and Niigata. With daylight on 14 June, she dived, stopped her starboard propeller, and commenced hunting underwater. Less than an hour later, she sighted smoke and attempted to intercept. Her quarry, two cargo ships beat