Complex sentence: Due to age she was rebuilt in 1953 at the Sturgeon Bay Shipbuilding & Dry Dock Company of Sturgeon Bay, Wisconsin and was renamed "Firefighter" upon her return.
Split into simpler sentences: Due to age she was rebuilt in 1953 at the Sturgeon Bay Shipbuilding & Dry Dock Company of Sturgeon Bay, Wisconsin. She was renamed "Firefighter" upon her return.