Researchers have used advanced deep-sea imaging technology to provide detailed, high-definition images and video of a First World War submarine lying off the coast of California.
On 17 December 1917, the US Navy submarine USS F-1 sank following a collision with its sister ship, which made a hole in the hull. It rapidly filled with water, resulting in the death of 19 crew members.
The wreck, which was discovered in 1975 to still be intact, lies approximately 7.2km off the coast of La Jolla, California, in about 457 metres of water.
During a series of deep-sea training and engineering dives earlier this year, researchers from the Woods Hole Oceanographic Institution (WHOI), a non-profit marine research firm based in Massachusetts, managed to capture high-resolution images of the wreck for the first time.
The fleet employed for the dives included the human-occupied submersible Alvin and an autonomous underwater vehicle called Sentry.
Using its multi-beam sonar systems, Sentry performed meticulous...