from the initial shots, causing it to provide highly inaccurate results to the guns. After the bombardment ended at 11:10 am, the ships involved rejoined the carriers. Further air attacks were conducted on 15 June. During the afternoon, two groups of Avengers attacked a floating dry dock and several oil tanks. That night six Avengers armed with bombs supported by two flare-dropping Avengers conducted the final British attack on Truk, but it is believed that most of their bombs landed in the sea. This was the BPF's first large-scale night operation. Aftermath At the conclusion of the night strike Task Group 111.2 departed for Manus Island. On 16 June a Japanese aircraft was detected by radar. One of the Seafires was detached from the combat air patrol to intercept it, but the fighter's pilot had to abandon the attempt due to a mechanical problem. The Task Group arrived at Manus Island on 17 June, and continued training exercises there until the remainder of the BPF arrived on 4 July en route to further operations off Japan. All of the warships at Manus sailed on 6 July to join the Fast Carrier Task Force in attacks on the Japanese home islands. Implacable and the other ships of the BPF operated against Japan from 17 July to 12 August, during which time the Fleet conducted air attacks and participated in several bombardments of coastal Japanese cities. On 12 August most of the BPF's ships, including Implacable, departed for a period of maintenance and rest at Sydney. A new Task Group 111.2 was formed by the BPF at Sydney on 12 August 1945. This force comprised the veteran aircraft carrier , three newly arrived light fleet carriers, two battleships, two or three cruisers and nine destroyers. These ships were intended to reinforce the BPF for the planned invasion of Japan, but lacked recent combat experience. Consideration was given to using the force to attack Truk again, with this operation possibly also including an invasion of the atoll by Australian or New Zealand forces, but this was unnecessary as Japan surrendered on 15 August. United States air units regularly attacked Truk until the end of the war. The atoll's garrison formally surrendered at a ceremony conducted on board on 2 September 1945, the same day as the general Japanese surrender documents were signed. The Japanese soldiers and sailors on Truk were repatriated during November