interesting short video just released of the splashing of a new Littoral ship in Marinette Wisconsin. I remember Marinette because for about twenty years, maybe 30, Marinette shipyards use to make aluminum hulled boats for the US pleasure market. Only Burger, also from Wisconsin, who built huge yachts, built in aluminum once Chris Craft went to fiberglass.
Aluminum yachts/ships are high maintenance, very tough to keep paint on them and lots of anti-galvanic corrosion systems on them, but like the Grumman bread trucks, they last forever...and will dent instead of puncture/fail usually but they sink too. Since there are millions of aluminum small fishing boats out there, most of us have sat in one one time or another.
Yes they sink, which all cruise lines know, as almost all cruise liners today are made from aluminum. And who builds many if not most of them? Fincantieri in Italy.
And who does Fincantieri now own? Marinette Shipbuilding.
An Italian cruise liner builder builds our warships. I guess we trust the Italians...

The big stuff comes out of New Orleans, Maine or Norfolk I suppose, but once WWII started Marinette was "drafted" and ever since they have made aluminum boats for the military. And I bet they were good boats. Likely a little noisy...not much sound deadening in that material. Any of you real Navy guys I'm sure can comment on hull noises.
Fincantieri Marinette Marine Company Profile
I grew up an hour away from the Philadelphia Navy Yard, where old destroyers and other mothballed ships are kept. If you drive North on Route 95 through Philadelphia and look down to the right you'll still see some ships left there. And occasionally a smaller warship would be brought up river for repairs and refurb there. Now that was neat to go boating around. If you got too close, the Navy police would come rocketing out at you but where else could you get close, really close to big armored ships?
Something tells me they keep private boats even further away now...
It's 5:30 in the morning and I wish it were light out. C'mon summer.