The 4,086-passenger Bliss, with its Robert Wyland-painted humpback whale on the hull, was christened in Seattle and will sail Alaska in the summer. Its showcase feature is the two-deck, electric go-kart track, the first on a ship in North America, but equally appealing is the 20,000-square-foot observation lounge with wraparound windows for forward viewing. New to Norwegian: the ship's connecting staterooms.