 The airstrip's revetments were transformed into heavy machine gun posts.The two destroyer minesweepers were supposed to sweep the entrance to Seeadler Harbour between Hauwei and Ndrilo Islands but fire from at least one Japanese gun on Hauwei Island prevented them from entering the harbour.Captain Emile Dechaineux, commanding the destroyers supporting the forces ashore, brought "Ammen", "Bush", "Mullany" and "Warramunga" around and bombarded the island.