Wonder, Obsession, and Murder in the World of Amateur Submarines,” Matthew Gavin Frank dives into the subculture of DIY ...

The Submarine UC3 Nautilus is lifted onto a block truck from the salvage ship Vina with the help of a container crane in Copenhagen's Harbor, on August 12, 2017. Getty ...

The navy initially said the 40-ton, nearly 18-meter-long (60-foot-long) UC3 Nautilus was "found sailing" south of Copenhagen on Friday. However, navy press spokesman Anders Damgaard later said it ...

When the UC3 Nautilus was first launched in 2008, it was touted as the world’s largest privately built submarine. It’s had some trouble along the way but was back in action this year.

The UC3 Nautilus was the third and largest submarine effort by the club, costing $200,000 to construct. It served as a workhorse for Copenhagen Suborbitals, ...

A photo (left) allegedly shows Swedish journalist Kim Wall (right) standing in the tower of the private submarine UC3 Nautilus on Aug. 10, 2017, in Copenhagen Harbor. EPA/Getty Images A mystery ...

Peter Madsen, owner of amateur-built Nautilus submarine, ... 46, but his success financing his submarine project through crowdfunding and completing the UC3 Nautilus in 2008 made headlines.

Madsen told the court that Swedish journalist Kim Wall, who had accompanied him on the UC3 Nautilus for a planned profile, died when a heavy hatch escaped his grip and fell shut on her head.

He said his UC3 Nautilus sank when it developed a ballast tank problem. But the kooky Danish inventor — who has been charged with negligent manslaughter — came clean about the deep-sea mystery ...

The Nautilus UC3 was the site of the death of journalist Kim Wall. Peter Madsen, who built the submarine, is accused of her murder. They were together on the submarine in August 2017 when it sank.

Swedish journalist Kim Wall was possibly strangled or had her throat slit aboard the UC3 Nautilus, a 58-foot submarine built by Danish inventor Peter Madsen, a medical examiner said Thursday ...

Peter Madsen, the man known for killing and dismembering a Swedish journalist while aboard his homemade submarine, briefly escaped a prison where he is serving a life sentence. Madsen, 49, escaped ...