Complex sentence: In 1825, Beechey was appointed to command the HMS "Blossom", which was intended to explore Bering Strait, in concert with Franklin and Parry operating from the east.
Split into simpler sentences: In 1825, Beechey was appointed to command the HMS "Blossom". His task was to explore the Bering Strait in concert with Franklin and Parry operating from the east.