On the 26th, "Thuban" completed discharging her cargo. During air attacks that night, an enemy plane dropped a stick of bombs from "Thuban", and a low-flying Japanese aircraft crashed the superstructure of the cargo ship off "Thuban's" port beam before plunging into the water. That same night, a surprise Japanese counterattack on shore left large numbers of wounded near Garapan requiring evacuation. Anchored off Susupe Point on the morning of the 27th, "Thuban" embarked 91 injured men filling sick bay, the main deck, and many quarters areas to overflowing with stretcher cases. The attack cargo ship's crew assisted in bathing, bandaging, and feeding the wounded while the ship's one doctor and his assistants aided the most severely injured. On this hectic day, "Thuban" also fueled, watered, and provisioned various ships. That evening, as the ship made smoke during a prolonged period of air raids, phosphorescent bombs hit the beach near Susupe Point, and a bomb narrowly missed one of her landing craft in the process of transporting a load of wounded. Action continued after midnight as five bombs hit the beach from the ship's position.