 Along with Derek Carr's challenge and defeat of his senior for control of the wardroom, this led to Tyre pleading with Admiral Brentley upon "Hibernia's" return to Earth to be allowed to resign, but Seafort instead offered to take Tyre with him on his next ship.Aboard "Portia", Tamarov continued to hound Tyre, until eventually Seafort was forced to step in himself to end what had turned from a justified controlling of a vicious character to an unjustified hounding of a broken subordinate.When Seafort was transferred to "Challenger" on Admiral Tremaine's orders, Tyre was sent with him, against Seafort's wishes, and during the ship's ordeal proved himself a conscientious officer, who had put his former viciousness aside and ably took command of "Challenger" after Seafort became seriously ill after being shot by a mutineer.