For the purposes of studying human archaeology, I don't care about the deep sea. I want LIDAR surveys of shallow coastline waters. Global sea levels 20,000 years ago were 125 meters lower than they were today. Our ancestors could have been living on shorelines that are now deep under water. There could be extensive archaeological sites that are undiscovered because they are buried under 60 meters of ocean water.

Ancient human tools have been found by fishing boats in Doggerland, the portion of the North Sea that used to be a land bridge between Europe and England. I bet there's a whole lot more discoveries to made just a few miles offshore.