On 30 June, the warship put to sea in the screen of the bombardment force assigned to the seizure of Noemfoor, an island located between Biak and the Vogelkop. During the landings on 2 July, "Ammen" drew no gunfire support missions and so, contented herself with antisubmarine and antiaircraft defense patrols against an enemy notable only for his absence. Between the conclusion of her part in the Noemfoor occupation and the Sansapor operation late in July, the destroyer carried out harassment missions against bypassed Japanese garrisons on the New Guinea coast from the base at Aitape. During the last four days of July, "Ammen" participated in the unopposed landings at Cape Sansapor on the northwestern coast of the Vogelkop. After Sansapor, the warship embarked upon a voyage to Sydney, Australia, for an 18-day liberty and upkeep call.