At least 30 places or objects of potential interest in the search for MH370 that have already been detected on the floor of the south Indian Ocean are about to be resurveyed by deeper, sharper sonar scans. In its weekly search update the JACC says checking the objects more closely now will speed up the overall search by eliminating (or confirming) objects that would otherwise remain unchecked until winter sea conditions abate sufficiently to deploy the highly capable Norwegian AUV or autonomous underwater vehicle which has been in storage for five months.