This is Paul Allen's Octopus, the world's largest private yacht, at 413 feet. Though details about the yacht are tight, it is known to have a 60 foot tender that is kept in a rear floodable drydock. To launch the tender (which probably has a tender of it's own), the interior compartment it is kept in in the rear is flooded and the launch is simply driven out. Beyond this, there is a hatch that opens directly out of the bottom of the boat, from whence a fuel-cell powered submarine is launched. The submarine with seating for ten is capable of remaining under water for extended periods of time. Inside the yacht there is a movie theater, and probably a recording studio, a favorite aspect for the music-loving Allen. There are two helipads, one aft, and a small one on the prow. The aft pad features a "garage" into which the helicopter can be placed after landing to protect it from the rough marine environment. Along the rear waterline at the hull, there are several rectangular hatches. The rearmost one on the starboard side opens to become a swimming/launch deck, and to reveal a bar (with large flatscreen) and a hot tub. Another hatch hides a smaller tender, while another six or eight jetskis. Sweeeet.