Complex sentence: The rebels, along with Henrique Galvao, seized the ship, ceased all communication, and killed one officer (3rd Pilot Nascimento Costa) and wounded several others in the process of taking complete command over the ship.
Split into simpler sentences: The rebels, along with Henrique Galvao, seized the ship and ceased all communication. One officer (3rd Pilot Nascimento Costa) was killed and several others wounded in the process of taking control of the ship.