Does this mean that the location of vital components have been identified and mapped, and therefore no further activity is required by them.
They will have completed high resolution sidescan sonar flights over the area, then reverted to camera fly-by of the debris field, probably taking shots from all four quadrants. They are obviously confident that all major components of the aircraft have been accounted for and that they have sufficient information to allow the recovery operation (Phase 5) to proceed in due course.
This operation has certainly proved the operational capability of the REMUS 6000 AUVs provided by the Waitt Institute for Discovery (2) and the Geomar Oceanographic Institute, Germany (1), and operated by the Woods Hole Oceanographic Institution's REMUS team.