The Operational Search for MH370

The Australian Transport Safety Bureau coordinated the underwater search and published the operational-search report that later search campaigns still treat as the engineering baseline. It explains BTO (range rings) and BFO (Doppler) analysis, collaboration with Inmarsat and DSTG, debris-drift inputs from CSIRO, and why the 2014–2017 priority zone was where it was. It also documents the April 2014 acoustic detections and their subsequent rejection. The report is careful: it locates a search area, not a crash site. Later Ocean Infinity boxes are revisions of this geometry, not a replacement of the SATCOM physics.