Where do they use “lots of aluminum “?
Mostly in the upper works and superstructure. https://en.wikipedia.org/wiki/USS_Wasp_(LHD-1)
“USS Wasp was built using more than 21,000 tons of steel, 400 tons of aluminum, 400 miles (640 km) of electrical/electronic cables, 80 miles (130 km) of piping and tubing of various types and sizes, and 10 miles (16 km) of ventilation ducting.”
For real?
Aluminum components and superstructure over a steel hull.
Bonhomme has essentially become an aluminum smelter.