Dump-site locations and drum condition are poorly known
#00118
Barrels were logged only approximately when dumped. Their exact positions on a 14,500 km² abyssal plain, their present state of corrosion, and which have already breached and spilled are largely unknown — you cannot manage or monitor what you cannot find.
#00122Tiered deep-sea survey: AUV wide-area mapping then crewed/ROV close inspection
Use an AUV to fly lawnmower tracks over the dump zone and build georeferenced photo-mosaics locating individual drums, then send a crewed submersible or ROV for close visual assessment, radiometry, and sampling of selected targets. Two tiers make partial coverage of a 14,500 km²