Spain’s S-80 Plus submarine is an advanced design featuring Air Independent Propulsion (AIP), which is reported to have cost around € 1 billion. The original design came in overweight, so it necessary to lengthen the submarine by 10 meters. Now, it appears that the newly delivered sub is too large for the Spanish naval dock at Cartagena. The dock will require dredging and an extension. Oops.
Three more submarines of the class are under construction in the Spanish shipyard Navantia in Cartagena.
Not too bad compared to the boondoggles we have in our military budget.