Photo at dusk of the IX-529 Sea Shadow.  The city of San Francisco and Golden Gate Bridge are hazily visible in dark greys in front of the faint gray mountains in the background.  The calm, dark blue sea stretches from that backdrop to the foreground.  
The Sea Shadow is pointed slightly obliquely toward the camera.  This ship is shown in all shades of dark grey and black.  It has a faceted prow that seems aero-smooth but is really to reflect radar away from the transmitters.  The small row of flush-mounted windows near the roof are the only openings in the front or sides.  The sides are flat and slope at around 45 degrees.  The sides continue below the floor of the fuselage, entering the water as full-length blades.  
These blades or wings connect the submerged, hidden, full-length drive-pods that provide the ship's actual buoyancy:  the fuselage hovers above the water, we can see under/through the gap between floor and water in the picture.  
Visible on the roof are three people, and some antennae for radios and radar.  The trapezoidal hatch is open near the centerline, some feet (a bit more than 1m) behind the cockpit windows.  While the water is very calm, it's also obvious that the blades cut through the water smoothly, there's no sign of wake water stains on the side.  The ship was designed for extreme stealth and steadiness and proved successful at both.  The design is classified as "Small Wetted-Area, Twin-Hull" or SWATH.
Photo at dusk of the IX-529 Sea Shadow. The city of San Francisco and Golden Gate Bridge are hazily visible in dark greys in front of the faint gray mountains in the background. The calm, dark blue sea stretches from that backdrop to the foreground. The Sea Shadow is pointed slightly obliquely toward the camera. This ship is shown in all shades of dark grey and black. It has a faceted prow that seems aero-smooth but is really to reflect radar away from the transmitters. The small row of flush-mounted windows near the roof are the only openings in the front or sides. The sides are flat and slope at around 45 degrees. The sides continue below the floor of the fuselage, entering the water as full-length blades. These blades or wings connect the submerged, hidden, full-length drive-pods that provide the ship's actual buoyancy: the fuselage hovers above the water, we can see under/through the gap between floor and water in the picture. Visible on the roof are three people, and some antennae for radios and radar. The trapezoidal hatch is open near the centerline, some feet (a bit more than 1m) behind the cockpit windows. While the water is very calm, it's also obvious that the blades cut through the water smoothly, there's no sign of wake water stains on the side. The ship was designed for extreme stealth and steadiness and proved successful at both. The design is classified as "Small Wetted-Area, Twin-Hull" or SWATH.