Complex sentence: On 13 April 1808 Sub Lieutenant James Young was court martialed aboard the "Salvador del Mundo" at Plymouth with smoking in the galley with the people and permitting liberties derogatory to the character of an officer.
Split into simpler sentences: On 13 April 1808 Sub Lieutenant James Young was court martialed aboard the "Salvador del Mundo" at Plymouth. The charge was conduct unbecoming in that he indulged in smoking in the galley with the people and permitted liberties derogatory to the character of an officer.