Black box signals of missing flight 370 detected by Navy team

The Bluefin-21 autonomous underwater vehicle

Newscast Media WASHINGTON—U.S. Navy personnel continue their support of the
search for missing Malaysia Airlines Flight 370, a Pentagon spokesman said April 7.
The United States has two P-8 Poseidon aircraft searching in the Indian Ocean, Army
Colonel Steve Warren said.

Navy aircraft supporting the search have flown 24 missions, with 220 hours of flight
time covering 336,000 square nautical miles, according to a U.S. 7th Fleet news
release.

“Additionally, we have two pieces of highly sophisticated underwater detection
equipment [engaged in the search] — the towed pinger locator and the Bluefin-21
[sidescan sonar],” Warren said.

Both underwater devices are operating from the Australian Defense Vessel Ocean
Shield, the news release said.

The team operating the towed pinger locator detected signals April 6 that are
consistent with sounds that would come from a black box, the release said. The
signals were detected on at least three separate occasions for extended periods of
time and at several different depths. The locator also detected two signals at the
same frequency, but in different locations, which would be consistent with signals
transmitted by both a flight data recorder and a cockpit voice recorder, the release
noted.

The team is working to reacquire the signal and plans to use the Bluefin-21 to create
a picture of any potential wreckage.

The search is a round-the-clock operation, and is currently focused on an area about
950 nautical miles northwest of Perth, Australia.

Determining the location and position of search assets is “a very collaborative effort
between Americans, the Australians, the Malaysians and others,” Warren said. But, he
added, “the Australians right now do have the lead.

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