The long rule of Tahmtan toward the end was interrupted by a coup under his loyal brother, Kay Qobad, who took advantage of Tahmtan's visit to the coastal port of Gambrūn (later Bandar-e Abbas), declared himself king. Tahmtan did not try to resist, retiring to Qalhat, waiting until Kay Qubad's death a year later. Upon returning to the throne, Tahmtan tried to buy the friendship of Kay Qubad's sons, Shanba and Shadi, who refused. The pursuing war ended in Tahmtan's success. However, he was soon dead, in 1346, being succeeded by his son Yusef, known as Turan Shah I. Turan Shah continued the tolerant policies of his father and grand-father, giving priority to the security of the port of Hormuz and to the passage of goods through the Strait of Hormuz by strengthening his hold over the region of Qalhat (modern region of Musandam). The trade of Hormuz at this time consisted of goods coming from India and Southeast Asia, usually destined for the markets of Iran and Iraq, as well as goods, including slaves, coming from Central Asia. A contemporary of Tahhmtan describes the situation as such: