On Halloween Day, 1968, weekend sailor and lifelong tinkerer Donald Crowhurst set sail aboard an untested trimaran, 
The Teignmouth Electron,  determined to win the first-ever official race to single-handedly  circumnavigate the globe. At stake was a generous cash prize that would  save his failing business from insolvency and provide an opportunity to  very publicly prove the value of the device he had invented (and that  his business manufactured): the Navicator, a handheld marine navigation  device. The race was sponsored by the 
Sunday Times, so the victor would get not just money but invaluable media exposure.
Even  before the race began, things looked uncertain for Crowhurst. The boat  he was sailing was of a completely new design, as yet unproven; one  observer noted that the boat was very fast but that it couldn't sail  close to the wind. And when it was running at full speed it began to  vibrate, shaking loose the screws in the self-steering apparatus.  Ironically, even Crowhurst's navigational abilities were questioned  during a pre-race test sail. Worst of all, there wasn't time to add in  all the usual safety features. Undeterred, Crowhurst just beat the  October 31 deadline for departure and headed into open water.
Soon  after the race began, Crowhurst ran into trouble, sailing far more  slowly than he had planned. It wasn't long before he realized that he  had no chance of winning the race whatsoever, and instead faced a  difficult choice: finish the race and risk his life aboard a boat he  couldn't control; give up in defeat and send his business into  bankruptcy; or take a shortcut and falsify his navigational logs.  Fatefully, Crowhurst chose the latter, maintaining from that moment on  two logs--one actual and one invented--about his progress.
Pieced together by two 
Times reporters following the discovery of the abandoned 
Teignmouth Electron (and Crowhurst's navigational logs), 
Deep Water  captures the enigma at the center of Crowhurst's final voyage--a  quixotic attempt to save his business, and to provide for his young  family, by attempting to become the first person to sail around the  world without stopping. It is a mesmerizing journey into uncharted  territory, not just of the world's oceans but of the darkest corners of  the human mind.