The Octopus is the world's largest privately owned yacht at 127 meters long. It was launched in 2003 for billionaire Paul Allen, co-founder of Microsoft, at a cost of over $200 million. With a permanent crew of 60, including former Navy SEals, the Octopus features two helicopters, seven tender boats, a 10-person submarine, and an underwater remote vehicle. It requires a $20 million annual budget to operate and maintain.