In mid-February 1942, "Ryūjō"s aircraft attacked ships evacuating from Singapore, claiming eight ships damaged, three burnt, and four sunk. They also covered convoys carrying troops to Sumatra. The ship was unsuccessfully attacked by several Bristol Blenheim light bombers of No. 84 Squadron RAF on 14 February. The following day two waves of B5Ns, totaling 13 aircraft, attacked the British heavy cruiser , but managed only to damage the ship's Supermarine Walrus seaplane. Follow-on attacks the same day were also unsuccessful. Two days later, B5Ns destroyed , a Dutch destroyer that had run aground in the Gaspar Strait and been abandoned on 14 February. The carrier sailed to Saigon, French Indochina, the next day and arrived on 20 February. A week later she was assigned to cover the convoy taking troops to Jakarta, Java. Her aircraft participated in the Second Battle of the Java Sea on 1 March and six B5Ns sank the American destroyer after it had been abandoned by its crew. Six other B5Ns bombed the port of Semarang, possibly setting one merchantman on fire.