Complex sentence: The Hadley received the signal that there was no parking space in Duluth coal docks, therefore, the captain decided to change the direction to the left toward the Superior Entry without acknowledgement of the Thomas Wilson.
Split into simpler sentences: The Hadley received the signal that there was no parking space in Duluth coal docks. As a result of the signal, the captain decided to change the direction to the left, toward the Superior Entry, without acknowledgement of the Thomas Wilson.