Complex sentence: He is credited with making significant contributions to the design of the airship, and the Inspecting Captain of Airships Murray Sueter later appointed him to be the captain of the airship when it was completed.
Split into simpler sentences: He is credited with making significant contributions to the design of the airship. The Inspecting Captain of Airships Murray Sueter later appointed him to be the captain of the airship when it was completed.