Complex sentence: The design process was complicated by numerous changes demanded by various departments of the Naval Technical Committee, but the design was finally approved on 12 June 1897, although design changes continued to be made and slowed the ship's construction.
Split into simpler sentences: The design process was complicated by numerous changes demanded by various departments of the Naval Technical Committee. The ship's design was finally approved on 12 June 1897, although design changes continued to be made that slowed the ship's construction.