Complex sentence: Between April 1842 to April 1847, under the command of Lieutenant Charles Bampfield Yule as a tender to HMS "Fly" in the East Indies Station she undertook surveys around Australia.
Split into simpler sentences: Between April 1842 to April 1847, under the command of Lieutenant Charles Bampfield Yule as a tender to HMS "Fly". In the East Indies Station she undertook surveys around Australia.