4 April 2014—pm
Today there have been some sightings of objects reported by ships in the search area but none were associated with MH370 (as at 1900 AEDT).
The Royal Australian Navy, using the Towed Pinger Locator from the United States Navy on Australian Defence Vessel Ocean Shield, and the Royal Navy, with a similar capability on HMS Echo, today began the underwater search for emissions from the black-box pinger from Malaysia Airlines flight MH370.
A total of 14 aircraft and 11 ships were involved in today's search activities.
The Australian Maritime Safety Authority determined a search area of about 217,000 square kilometres, 1700 kilometres North West of Perth.
Weather in the search area was good, with visibility greater than 10 kilometres.