High Quality Content by WIKIPEDIA articles! HMS Pioneer was a Colossus-class aircraft carrier built for the Royal Navy during World War II. She was modified whilst under construction into an aircraft maintenance carrier. The ship arrived in Australia in early 1945 to support operations by the British Pacific Fleet (BPF) against Japanese forces. She supported the BPF`s attacks on the Japanese Home Islands from until until the end of the war in August from a base in the Admiralty Islands. The ship and her facilities were used to help repair Hong Kong`s infrastructure in late 1945 and she returned to the UK in early 1946. Pioneer was immediately placed in reserve upon her arrival and she was sold in 1954 for scrap.