The future is here: This water-based Imperial Star Destroyer is really the spectacular Swedish Visby-Class corvette, the first operational stealth ship in the world, powered with silent waterjets and made with non-magnetic composite materials.
According to the experts, the corvettes are "electronically undetectable at more than 8 miles (12km) in rough seas and at more than 13.5 miles (21km) in calm seas". Their creation was an answer to the incursion of foreign submarines in Swedish waters in the mid-eighties.
The corvettes are designed to travel at more than 35 knots in between the many beautiful islands that populate Sweden's shallow coast, thanks to waterjets-made by Rolls-Royce subsidiary Kamewa-that reduce their draft. Their mission will be to quickly patrol their territorial waters while hunting for enemy submarines and other ships.
While I prefer to travel the Swedish coast on a sailing ship, I wouldn't mind getting a quick surf on these things when they enter in service at the end of this year (as they are probably staffed with non-stealth blonde valkyries.)