Search & investigation archive
A dated entry in the MH370 record.
The date below is the event date recorded in the earlier archive. Background reports are provided for context; they do not independently verify every detail in this entry. Read the original source before relying on a specific claim.
Recorded event date:
The large-scale underwater search begins, with vessels deploying sonar systems to map the seabed across priority areas.
Search teams focus on systematically surveying defined zones, and updates describe the technical approach, the scale of the operation, and the environmental challenges.
Authorities state that the underwater search is a long-term effort and that progress will be reported as coverage expands.
Check the record
Official account of the investigation and search history.
Government investigation documents and supporting records.