 She directly sank several small sailing vessels, whilst the Japanese auxiliary submarine chasers "Cha 8" and "Cha 9", the army tanker "Takekun Maru" and the auxiliary minelayer "Ma 1" were sunk after hitting mines laid by "Porpoise".The auxiliary minesweeper "Kyo Maru No.1" and the submarine chaser "Ch 57" were damaged by mines.