The first deployment of
an underwater vehicle to hunt for Malaysia Airlines Flight 370 was
aborted early, sending the drone back to the surface before expected.
The Bluefin-21 vehicle
was supposed to take 2 hours to get to its designated depth Monday,
spend 16 hours searching, and 2 hours coming back up.
Instead, it spent about 7 and 1/2 hours in the water, including descent and ascent times, a source said.
Search officials analyzed data from Bluefin-21, and found no objects of interest, the U.S. Navy said Tuesday.
Crews will try to send the probe back into the Indian Ocean later Tuesday, weather permitting.
So what went awry the first time?
"In this case, the
vehicle's programmed to fly 30 meters over the floor of the ocean to get
a good mapping of what's beneath and to the sides, and the chart we
have for the area showed that water depth to be between the 4,200 and
4,400-meter depth," said Capt. Mark Matthews, who heads the U.S.
presence in the search effort.
But the water was deeper than expected -- about 4,500 meters.
"Once it hit that max depth, it said this is deeper than I'm programmed to be, so it aborted the mission," Matthews said.
David Kelly, CEO of the
company that makes the Bluefin-21, said the device's safety mechanisms
have triggered such recalls in the past.
"Although it's
disappointing the mission ended early, it's not uncommon," Kelly said.
"We've operated these vehicles around the globe. It's not unusual to get
into areas where the charts aren't accurate or you lack information."
Mathews said the initial
launch Monday night took place "in the very far corner of the area it's
searching, so they are just shifting the search box a little bit away
from that deep water and proceeding with the search."
It is unclear how much
of the area -- 5 kilometers by 8 kilometers (3.1 miles by 4.9 miles) --
the Bluefin scanned during its first attempt. It could take up to two
months to scan the entire search area.
If ever found, just
which country will take custody of the plane's data recorders?
Malaysia's Acting Transportation Minister Hishammuddin Hussein said
Tuesday it wasn't as important as "finding out the truth."
Also Tuesday, the
Malaysian Cabinet agreed to set up an international investigation. It
will be comprised of teams that will look into the airworthiness of the
plane, the operational aspect, and the medical and human factors that
may have played a part.
The co-pilot's cell phone
While search crews probe the ocean floor, a new detail emerged from the flight.
The cell phone of the
first officer of Malaysia Airlines Flight 370 was on and made contact
with a cell tower in Malaysia about the time the plane disappeared from
radar, a U.S. official told CNN on Monday.
However, the U.S.
official -- who cited information shared by Malaysian investigators --
said there was no evidence the first officer, Fariq Abdul Hamid, had
tried to make a call.The official told CNN's
Pamela Brown on Monday that a cell-phone tower in Penang, Malaysia --
about 250 miles from where the flight's transponder last sent a signal
-- detected the first officer's phone searching for service roughly 30
minutes after authorities believe the plane made a sharp turn westward.
The details do appear to
reaffirm suggestions based on radar and satellite data that the plane
was off course and was probably flying low enough to obtain a signal
from a cell tower, the U.S. official said.
U.S. officials familiar
with the investigation told CNN they have been told that no other cell
phones were picked up by the Penang tower.
Pilots are supposed to turn off their cell phones before pushing back from the gate.
When the plane first
went missing, authorities said millions of cell phone records were
searched, looking for evidence that calls had been made from the plane
after it took off, but the search turned up nothing.
The suspected oil slick
Another possible clue into the plane's disappearance emerged Monday.
Australian officials
announced the Australian ship Ocean Shield had detected an oil slick
Sunday evening. It is unclear where the oil came from; a 2-liter sample
has been collected for examination, and was on its way Tuesday to
western Australia for analysis. Testing could be days away.
CNN Aviation Analyst Les Abend, who flies a Boeing 777, said the engines on the plane have about 20 quarts of oil each.
"It could be slowly
dripping up to the surface," he told CNN's "Anderson Cooper 360."
"They're saying an oil slick. I'm wondering if it's just some sort of a
fluid slick. It could be (from) hydraulics."
If it is oil, it's not
the first oil slick detected as part of the search. A similar find in
the first days of the search was determined to be fuel oil from a
freighter.
Surface search nearing end
"The air and surface
search for floating material will be completed in the next two to three
days in the area where the aircraft most likely entered the water,"
Houston said.
That search was
energized last week when searchers using the Navy-owned pinger locator
and sonobuoys detected sounds that could have been from the plane's
black boxes, or data and voice recorders.
But after a week of
silence, the batteries powering the locator beacons are probably dead,
an official from the company that makes the beacons told CNN on Sunday.
They were certified to last 30 days, a deadline that's already passed.
That means searchers may not be able to detect any more pings to help lead them to those pieces of the missing plane.