 In February 1927, "Unalga" arrived at Winslow, Washington for a six-week overhaul, leaving 15 April for regular patrol duties in Alaska.On 4 November 1927, she collided with the 15- or 18-gross register ton motor vessel "Eurus" in Dixon Harbor () in Southeast Alaska – where she had towed "Eurus" after "Eurus"′s engine broke down in Cross Sound in the Alexander Archipelago near Cape Spencer – while trying to get a new towline to "Eurus" after the original towline parted; "Eurus" sank 20 minutes later, and "Unalga" rescued her crew of two.On 27 June 1930, "Unalga" received orders to report to the Coast Guard Depot at Curtis Bay, Maryland for extensive repairs.