Jeff
Before steps 2,3,and 4 can be done, ya gotta do step 1B., 1A being done, i.e. locate a debris field.
1B= Retrieve a piece of the debris that appears to be a man-made part of aircraft origin and bring it up to the surface for examination and analysis. Too bad that wasn't included in the list of objectives of the ROV run. I know, Hindsight is always 20/20. But, we can always learn from experience.