Australian ship detects new
signals as plane hunt narrows
Agence France-Presse, Perth, Australia | World | Wed, April 09 2014, 1:56
PM
Two fresh signals have been picked up in the search for missing
Malaysian flight MH370, raising hopes Wednesday that wreckage will be found
within days even as black box batteries start to expire.
Australian ship Ocean Shield detected the signals Tuesday to match
a pair of transmissions picked up over the weekend
that have been analysed as consistent with signals from the plane's flight data recorder, the head of the search said.
"Ocean Shield has been able to reacquire the signals on two
more occasions, late yesterday afternoon and later last night," said Angus
Houston, head of the Joint Agency Coordination
Centre.
The Australian ship has now picked up four transmissions, crucial
information as searchers try to pinpoint the crash zone for the Malaysia
Airlines Boeing 777 that disappeared on March 8 with 239 people on board.
Officials had feared that the signals which were initially picked
up might not be detected again, particularly since the batteries on the black
box tracking beacons have a normal lifespan of about 30 days.
The new transmissions, found in the
same broad area as the previous two, lasted for five minutes and 32 seconds and
about seven minutes respectively, Houston said.
"Yesterday's signals will assist in better defining a reduced
and much more manageable search area on the ocean floor," Houston said.
"I believe we are searching in the right area but we need to
visually identify the aircraft before we can confirm with certainty that this
is the final resting place of MH370."
Houston again urged caution for the sake of the families of those
aboard the flight which mysteriously vanished en route from Kuala Lumpur to
Beijing, and said the search for more signals would go on.
"Hopefully with lots of transmissions we'll have a tight,
small area and hopefully in a matter of days we'll be able to find something on
the bottom that might confirm that this is the last resting place of
MH370," Houston told reporters.
- 'Not of natural origin' -
The hunt was now narrowing, with experts confirming the first
transmissions were consistent with black box recorders.
"The analysis determines that a very stable distinct and clear
signal was detected at 33.331 kHz and that it consistently pulsed at a 1.106
second interval," Houston said.
"They therefore assessed that the transmission was not of
natural origin and was likely sourced from specific electronic
equipment.
"They believe the signals to be consistent with the
specification and description of a flight data recorder."
Authorities have been searching a linear arc produced from satellite data and believed to represent the last
stretch of the plane's flight path.
While China's Haixun 01 vessel initially reported some acoustic
signals at the southern end of this trajectory, these have not occurred again,
Houston said.
No other ships will be allowed near the Ocean Shield, as its work
must be done in an environment as free of noise as possible, but a modified
RAAF AP-3C Orion was parachuting sonar buoys into the vicinity.
These will float on the surface and have a hydrophone attached
dangling 1,000 feet below to hopefully pick up any emissions, although
officials warned these could be dulled by thick silt on the seabed.
With the clock ticking on how long the black boxes could feasibly
continue to transmit, Houston said it would not be long before a US-made
autonomous underwater vehicle called a Bluefin 21 would be sent down to investigate.
Houston said officials were probably close to using this device
because the last acoustic signal was very weak, indicating the batteries were
running down.
"I don't think that time is very far away," he said.
He said the Ocean Shield could search six times the area with the
towed pinger locator that could be done with a sonar on the Bluefin.
Up to 11 military aircraft, four civil planes and 14 ships were
searching Wednesday over a zone covering 75,423 square kilometres (29,000
square miles), Australia's Joint Agency Coordination Centre said.
The focus of the search area is 2,260 kilometres (1,400 miles)
northwest of Perth.
The case of the missing jet has baffled aviation experts and
frustrated the families of those on board, two-thirds of whom were Chinese.
Despite extensive searches on the ocean surface, no debris has yet
been found but Houston said the visual searching would continue.
The retired Air Chief Marshal voiced optimism despite the
challenges of searching 4.5 kilometres (2.8 miles) below the surface in a
remote patch of the Indian Ocean.
"I am now optimistic that we will find the aircraft, or what
is left of the aircraft, in the not too distant future," he said. (***)
Sources:
My comment about the
case above:
What i know so far about the case, Malaysian airline Boeing 777
flight MH370 route from Kuala Lumpur Malaysia to Beijing China disappeared with
239 people on board. The plane was scheduled to arrive in Beijing at 06:30, but
until now the flight MH370 never arrived. Before the transponder has been
disabled by co-pilot. He said, "Well, good night" and it becomes the
last contact before MH370 stated disappeared.
In my opinion about the progress of the case, Malaysian government
cover the evidence that has been discovered by them and not all of the evidence
published by the Malaysian side. As we know flight MH370 disappeared out of
Malaysian territorial, so to able search plane Malaysian need help from the
countries in located around the sea of plane disappeared such as Vietnam,
China, Thailand, Indonesia, Australia.
A good news from Australia that they have found a signal from
flight MH370. The location about signal that has been found by Australian is
not different which found by China before. I hope signal that has been found
can be identify and help to searching MH370.
One month since flight MH370 disappeared, and a signal from
the black box flight MH370 has been found but to search MH370 completely it
will be not easy, because the battery from the black box almost experied. The
battery is already almost up to the expiration that is one month. If the
battery has expired and no longer giving the signal to search flight MH370 will
be very difficult. Because the location of the discovery of a signal from the
black box is in the oceans.
I hope signal from black box of MH370 that have been
discovered by China and Australia can help the search that is already up to one
month. I also hope that cause of flight MH370 can be published by the Malaysian
government, and will be learning for the next international flight.
