The USS Johnston, a 115m-long US Navy destroyer, rests at a depth of 6.5km (4 miles) in the Philippine Sea. Parts of the wreckage were filmed by an ROV in 2019, but just recently a submersible was used to survey and film the vessel in more detail.
It all started with Plumbers Union Local 130 about 60 years ago and the city of Chicago is still dyeing the Chicago River green in celebration of St Patrick’s Day. Probably not the most environmentally-friendly way to celebrate, but it does stand out:
Check out the “soft” AUV that a team of Chinese researchers have developed and tested in the Mariana Trench!
A BlueROV2 with Newton Gripper was used to release the little “mantabot” at depths of 8m and 70m during its testing phase, before the little flapper dove to 3,224m in the South China Sea and then 10,900m in the Mariana Trench.