All at sea: Australia's search for MH370 under scrutiny

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Australia's Search for MH370 Under Scrutiny


Nearly a year after embarking on a multi-million dollar quest to solve one of aviation's greatest unsolved mysteries, authorities and search teams are being criticised over their approach to finding Flight MH370 in the remote southern Indian Ocean.

The Australian-led search, already the most expensive in aviation history, has found no trace of the Malaysia Airlines jet or its 239 passengers and crew, prompting calls for a rethink into the way the mission is conducted.

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All at sea: Australia's search for MH370 under scrutiny
Relatives of Chinese passengers from the missing Malaysia Airlines flight MH370 offer prayers at Thean Hou Temple in Kuala Lumpur on March 1, 2015. The visit to the temple comes nearly a year after Malaysian Airlines MH370 went missing en route from Kuala Lumpur to Beijing with 239 people on board in March 2014. AFP PHOTO / MOHD RASFAN (Photo credit should read MOHD RASFAN/AFP/Getty Images)
A relative of one of the Chinese passengers from the missing Malaysia Airlines flight MH370 cries before offering prayers at Thean Hou Temple in Kuala Lumpur on March 1, 2015. The visit to the temple comes nearly a year after Malaysian Airlines MH370 went missing en route from Kuala Lumpur to Beijing with 239 people on board in March 2014. AFP PHOTO / MOHD RASFAN (Photo credit should read MOHD RASFAN/AFP/Getty Images)
A Relative of Chinese passengers from the missing Malaysia Airlines flight MH370 cries as he gathers outside Malaysian Prime Minister Najib Razak's office in Putrajaya on February 18, 2015. Chinese relatives of MH370 passengers gathered outside the Malaysian prime minister's office to demand his government rescind its declaration that all on board the plane were presumed dead. AFP PHOTO/ MANAN VATSYAYANA (Photo credit should read MANAN VATSYAYANA/AFP/Getty Images)
Relatives of Chinese passengers from the missing Malaysia Airlines flight MH370 offer prayers at Thean Hou Temple in Kuala Lumpur on March 1, 2015. The visit to the temple comes nearly a year after Malaysian Airlines MH370 went missing en route from Kuala Lumpur to Beijing with 239 people on board in March 2014. AFP PHOTO / MOHD RASFAN (Photo credit should read MOHD RASFAN/AFP/Getty Images)
Relatives of Chinese passengers from the missing Malaysia Airlines flight MH370, cries during a protest outside the Malaysia Airlines office in Subang on the outskirts of Kuala Lumpur on February 12, 2015. Chinese relatives of passengers on missing flight MH370 protested outside the Malaysian Airlines office demanding Malaysia withdraw the statement that all the passengers are dead. About 15 people gathered outside the gates wearing white caps and red t-shirts with words: 'Pray for MH370.' AFP PHOTO / MANAN VATSYAYANA (Photo credit should read MANAN VATSYAYANA/AFP/Getty Images)
A relative of one of the Chinese passengers from the missing Malaysia Airlines flight MH370 cries before offering prayers at Thean Hou Temple in Kuala Lumpur on March 1, 2015. The visit to the temple comes nearly a year after Malaysian Airlines MH370 went missing en route from Kuala Lumpur to Beijing with 239 people on board in March 2014. AFP PHOTO / MOHD RASFAN (Photo credit should read MOHD RASFAN/AFP/Getty Images)
Unidentified Chinese family members of passengers on board the missing Malaysia Airlines flight MH370 pray outside the prime minister's office in Putrajaya, Malaysia on Wednesday, Feb. 18, 2015. Flight 370, which disappeared last March 8 while flying from Kuala Lumpur to Beijing, is believed to have crashed in the southern Indian Ocean, off western Australia. (AP Photo/Joshua Paul)
FILE - In this April 9, 2014 file photo provided by the Australian Defense Force, a Royal Australian Air Force AP-3C Orion flies past Australian Defense vessel Ocean Shield on a mission to drop sonar buoys to assist in the acoustic search of the missing Malaysia Airlines Flight MH370 in the southern Indian Ocean. Crews will resume the underwater hunt for missing Malaysia Airlines Flight 370 at the end of the month, and will begin the search in an area farther south than initially planned, a senior search official said Friday, Sept. 19, 2014. (AP Photo/ADF, LSIS Bradley Darvill, File) EDITORIAL USE ONLY
The Malaysian government says the plane is believed to have went down in a remote area of the Indian Ocean and everyone on board was killed.
Jacquita Gomes, second from left, wife of in-flight supervisor Patrick Gomes aboard the missing Malaysia Airlines Flight 370, wipes her tears during the opening of the MH370 Tribute Photo Exhibition organized by the Foreign Correspondents Club of Malaysia at a shopping mall in Kuala Lumpur, Malaysia, Sunday, July 6, 2014. A Malaysia Airlines Flight 370 on March 8 carrying 239 people lost contact over the South China Sea on a flight from Kuala Lumpur to Beijing. (AP Photo/Joshua Paul)
A man looks at photos at the MH370 Tribute Photo Exhibition organized by the Foreign Correspondents Club of Malaysia at a shopping mall in Kuala Lumpur, Malaysia, Sunday, July 6, 2014. A Malaysia Airlines Flight 370 on March 8 carrying 239 people lost contact over the South China Sea on a flight from Kuala Lumpur to Beijing. (AP Photo/Lai Seng Sin)
In this June 15, 2014 photo, Hu Xiufang, front center, whose only child, daughter-in-law, and grandson, are missing along with other passengers on board the Malaysia Airlines Flight 370, burns incense as she prays with some other relatives of the missing passengers, on the 100th day after the flight went missing, at the Lama Temple in Beijing. Chinese characters on their T-shirts read: "Pray for MH370. Come home safely." The absence of proof of death has made any closure elusive for the relatives of the 239 men and women on the plane. (AP Photo/Alexander F. Yuan)
In this June 15, 2014 photo, relatives of Chinese passengers on board the missing Malaysia Airlines Flight 370 cry as they burn incense to pray for their loved ones, on the 100th day after the flight went missing, at the Lama Temple in Beijing. Chinese characters on their T-shirts read: "Pray for MH370. Come home safely." The absence of proof of death has made any closure elusive for the relatives of the 239 men and women on the plane. (AP Photo/Alexander F. Yuan)
One of the relatives of Chinese passengers onboard the missing Malaysia Airlines Flight 370, burns incense as she prays for her loved one after the flight went missing for 100 days at the Lama Temple in Beijing, China, Sunday, June 15, 2014. Despite a massive air and sea search, no trace of Flight 370 has been found, more than three months after it vanished after taking off from Kuala Lumpur bound for Beijing. Chinese characters on her T-shirt read: "Pray for MH370. Come Home Safely." (AP Photo/Alexander F. Yuan)
Relatives of Chinese passengers onboard the missing Malaysia Airlines Flight 370 burn incense as they pray for their loved ones after the flight went missing for 100 days, at the Lama Temple in Beijing, China, Sunday, June 15, 2014. Despite a massive air and sea search, no trace of Flight 370 has been found, more than three months after it vanished after taking off from Kuala Lumpur bound for Beijing. Chinese characters on their T-shirts read "Pray for MH370. Come Home Safely." (AP Photo/Alexander F. Yuan)
Chinese police men stand near a board with well wishes written by relatives of Chinese passengers onboard the missing Malaysia Airlines MH370 plane at a hotel in Beijing, China, Tuesday, April 29, 2014. Malaysian authorities on Tuesday in Beijing played for the first time the audio communications between flight 370's cockpit and air traffic controllers before the plane disappeared March 8.(AP Photo/Ng Han Guan)
A banner is displayed during a candlelight vigil for passengers onboard the missing Malaysia Airlines Flight MH370, in Kuala Lumpur, Malaysia, Monday, April 7, 2014. An Australian ship detected two distinct, long-lasting sounds underwater that are consistent with the pings from aircraft black boxes in a major break in the month long hunt for the missing Malaysia Airlines jet, the search coordinator said Monday. The banner reads " Awaiting for MH370" (AP Photo/Vincent Thian)
Malaysians gather during a candlelight vigil for passengers onboard the missing Malaysia Airlines Flight MH370, in Kuala Lumpur, Malaysia, Monday, April 7, 2014. An Australian ship detected two distinct, long-lasting sounds underwater that are consistent with the pings from aircraft black boxes in a major break in the month long hunt for the missing Malaysia Airlines jet, the search coordinator said Monday. (AP Photo/Vincent Thian)
Relatives of Chinese passengers on board the Malaysia Airlines Flight MH370 light candles in a prayer room in Beijing, China, Friday, April 4, 2014. Two ships with sophisticated equipment for searching underwater zeroed in Friday on a remote stretch of the Indian Ocean in a desperate hunt for the missing Malaysia Airlines jet's black boxes, whose batteries will soon run out. (AP Photo/Ng Han Guan)
Malaysian activists hold banners during a protest accusing US news channels of unprofessional reporting on missing Malaysia Airlines flight MH370, outside the US Embassy in Kuala Lumpur on April 3, 2014. Malaysian Prime Minister Najib Razak vowed on April 3 'we will not rest' until the fate of Flight MH370 is known, as Australia called it 'the most difficult search in human history'. AFP PHOTO / MANAN VATSYAYANA (Photo credit should read MANAN VATSYAYANA/AFP/Getty Images)
Malaysian activists hold banners during a protest accusing US news channels of unprofessional reporting on missing Malaysia Airlines flight MH370, outside the US Embassy in Kuala Lumpur on April 3, 2014. Malaysian Prime Minister Najib Razak vowed on April 3 'we will not rest' until the fate of Flight MH370 is known, as Australia called it 'the most difficult search in human history'. AFP PHOTO / MANAN VATSYAYANA (Photo credit should read MANAN VATSYAYANA/AFP/Getty Images)
PERTH, AUSTRALIA - APRIL 04: Chief Coordinator of the Joint Agency Coordination Centre, Air Chief Marshal Angus Houston (Ret'd) addresses the media at press conference at Dumas House on April 4, 2014 in Perth, Australia. Fourteen planes and nine ships resumed in the search for missing Malaysia Airlines flight MH370 in the Indian Ocean off the coast of Western Australia today. The airliner disappeared on March 8 with 239 passengers and crew on board and is suspected to have crashed into the southern Indian Ocean. (Photo by Paul Kane/Getty Images)
Malaysian Prime Minister Najib Razak, second right, and Australia's Prime Minister Tony Abbott, right, greet RAAF P-3 Orion crew members involved in the search for wreckage and debris of missing Malaysia Airlines MH370 in Perth, Australia, Thursday, April 3, 2014. (AP Photo/Rob Griffith, Pool)
Malaysian activists hold banners during a protest accusing US news channels of unprofessional reporting on missing Malaysia Airlines flight MH370, outside the US Embassy in Kuala Lumpur on April 3, 2014. Malaysian Prime Minister Najib Razak vowed on April 3 'we will not rest' until the fate of Flight MH370 is known, as Australia called it 'the most difficult search in human history'. AFP PHOTO / MANAN VATSYAYANA (Photo credit should read MANAN VATSYAYANA/AFP/Getty Images)
In this photo taken Saturday, March 22, 2014, a relative of Chinese passengers aboard the missing Malaysia Airlines, MH370, presents a slideshow showing a map of the route the missing plane took at a hotel meeting room in Beijing, China. The words on top reads "2. About the issue of time" . (AP Photo/Ng Han Guan)
Captain of the Japan Coast Guard Gulfstream Makoto Hoshi left, and his co-pilot Shunichi Yumiza sit in the cockpit during a search for the missing Malaysia Airlines Flight MH370 in Southern Indian Ocean, near Australia, Tuesday, April 1, 2014. Bad weather and poor visibility caused the search to be called off early with the coast guard plane only completing one of its three 210 nautical mile legs. (AP Photo/Rob Griffith, Pool)
Communications specialist Hidetaka Sato, on a Japan Coast Guard Gulfstream aircraft, looks out of a window searching for missing Malaysia Airlines flight MH370 over the southern Indian Ocean on April 1, 2014. Malaysia revealed the full radio communications with the pilots of its missing flight on April 1, but the routine exchanges shed no light on the mystery as an Indian Ocean search for wreckage bore on with no end in sight. AFP PHOTO / POOL / Rob GRIFFITH (Photo credit should read ROB GRIFFITH/AFP/Getty Images)
Page 1 of the full transcript of communications between flight MH370 and Kuala Lumpur Air Traffic Control released by the Malaysian defense minister on Tuesday, April 1, 2014.
Page 2 of the full transcript of communications between flight MH370 and Kuala Lumpur Air Traffic Control released by the Malaysian defense minister on Tuesday, April 1, 2014.
A picture taken off a computer monitor shows a piece of unknown debris floating just under the water that was spotted by a Royal New Zealand P-3 Orion while searching for missing Malaysia Airlines Flight MH370 in the southern Indian Ocean, Monday, March 31, 2014. The Orion crew could not identify the object and has sent images of it for analysis to the Rescue Coordination Center and Australian Maritime Safety Authority (AMSA).(AP Photo/Rob Griffith, Pool)
A shadow of a Royal New Zealand Air Force P3 Orion aircraft is seen on low cloud cover while it searches for missing Malaysia Airlines Flight MH370 in the southern Indian Ocean, Monday, March 31, 2014. (AP Photo/Rob Griffith, Pool)
In this image taken onboard a Royal New Zealand P-3 Orion, a piece of unknown debris floats just under the water while the plane was searching for missing Malaysia Airlines Flight MH370 , in the southern Indian Ocean, Australia, Monday, March 31, 2014. The Orion crew could not identify the object and has sent images of it for analysis to the Rescue Coordination Center and Australian Maritime Safety Authority (AMSA). (AP Photo/Rob Griffith, Pool)
A Royal New Zealand Air Force P-3 Orion's co-pilot and Squadron Leader Brett McKenzie controls the pane while searching for the missing Malaysia Airlines Flight MH370 in the southern Indian Ocean, Monday, March 31, 2014. (AP Photo/Rob Griffith)
A towed pinger locator sits on the wharf at the naval base HMAS Stirling ready to be fitted to the Defence ship Ocean Shield to aid in her roll in the search for missing Malaysia Airlines Flight MH370 in Perth, Australia, Sunday, March 30, 2014. An Australian warship with an aircraft black box detector was set to depart Sunday to join the search. It will still take three to four days for the ship, the Ocean Shield, to reach the search zone ? an area roughly the size of Poland about 1,850 kilometers (1,150 miles) to the west of Australia.(AP Photo/Rob Griffith)
A towed pinger locator sits on the wharf ready to be fitted to the defense ship Ocean Shield to aid in her roll in the search for missing Malaysia Airlines Flight MH370 in Perth, Australia, Sunday, March 30, 2014. An Australian warship with the aircraft black box detector was set to depart Sunday to join the search. It will still take three to four days for the ship, the Ocean Shield, to reach the search zone ? an area roughly the size of Poland about 1,850 kilometers (1,150 miles) to the west of Australia. (AP Photo/Rob Griffith)
U.S. Navy captain Mark Matthews, right, Royal Australian Navy commodore Peter Leavy, center, and chief of the navy Vice Admiral Ray Griggs stand on the dock before a press conference at naval base HMAS Stirling about the defense ship Ocean Shield and her roll in the search for missing Malaysia Airlines Flight MH370 in Perth, Australia, Sunday, March 30, 2014.(AP Photo/Rob Griffith)
Chief of the Navy Vice Admiral Ray Griggs speak at a press conference at naval base HMAS Stirling about the defense ship Ocean Shield and her roll in the search for missing Malaysia Airlines Flight MH370 in Perth, Australia, Sunday, March 30, 2014. An Australian warship with an aircraft black box detector was set to depart Sunday to join the search. It will still take three to four days for the ship, the Ocean Shield, to reach the search zone ? an area roughly the size of Poland about 1,850 kilometers (1,150 miles) to the west of Australia.(AP Photo/Rob Griffith)
A U.S. naval officer talks with a crewman as they stand next to part of the towed pinger locator before its fitted to the defense ship Ocean Shield to aid in her roll in the search for missing Malaysia Airlines Flight MH370 in Perth, Australia, Sunday, March 30, 2014. An Australian warship with an aircraft black box detector was set to depart Sunday to join the search. It will still take three to four days for the ship, the Ocean Shield, to reach the search zone ? an area roughly the size of Poland about 1,850 kilometers (1,150 miles) to the west of Australia.(AP Photo/Rob Griffith)
U.S. Navy captain Mark Matthews, right, Royal Australian Navy commodore Peter Leavy, center, and Chief of the Navy Vice Admiral Ray Griggs chat before a press conference at naval base HMAS Stirling about the defense ship Ocean Shield and her roll in the search for missing Malaysia Airlines Flight MH370 in Perth, Australia, Sunday, March 30, 2014. An Australian warship with an aircraft black box detector was set to depart Sunday to join the search. It will still take three to four days for the ship, the Ocean Shield, to reach the search zone ? an area roughly the size of Poland about 1,850 kilometers (1,150 miles) to the west of Australia.(AP Photo/Rob Griffith)
Master of the Ocean Shield Captain Nicholas Woods speaks about the roll his ship will play in the search for missing Malaysia Airlines Flight MH370 in Perth, Australia, Sunday, March 30, 2014. An Australian warship with an aircraft black box detector was set to depart Sunday to join the search. It will still take three to four days for the ship, the Ocean Shield, to reach the search zone ? an area roughly the size of Poland about 1,850 kilometers (1,150 miles) to the west of Australia. (AP Photo/Rob Griffith)
U.S. Navy captain Mark Matthews speaks at a press conference at naval base HMAS Stirling about the search for missing Malaysia Airlines Flight MH370 in Perth, Australia, Sunday, March 30, 2014. An Australian warship with an aircraft black box detector was set to depart Sunday to join the search. It will still take three to four days for the ship, the Ocean Shield, to reach the search zone ? an area roughly the size of Poland about 1,850 kilometers (1,150 miles) to the west of Australia.(AP Photo/Rob Griffith)
Australian Defense ship Ocean Shield lies docked at naval base HMAS Stirling while being fitted with a towed pinger locator to aid in her roll in the search for missing Malaysia Airlines Flight MH370 in Perth, Australia, Sunday, March 30, 2014. The Australian warship with an aircraft black box detector was set to depart Sunday to join the search. It will still take three to four days for the ship, the Ocean Shield, to reach the search zone ? an area roughly the size of Poland about 1,850 kilometers (1,150 miles) to the west of Australia.(AP Photo/Rob Griffith)
A sensor for the towed pinger locator sits on the wharf at the naval base HMAS Stirling ready to be fitted to the defense ship Ocean Shield to aid in her roll in the search for missing Malaysia Airlines Flight MH370 in Perth, Australia, Sunday, March 30, 2014. The Australian warship with an aircraft black box detector was set to depart Sunday to join the search. It will still take three to four days for the ship, the Ocean Shield, to reach the search zone ? an area roughly the size of Poland about 1,850 kilometers (1,150 miles) to the west of Australia. (AP Photo/Rob Griffith)
Australian defense ship Ocean Shield lies docked at naval base HMAS Stirling while being fitted with a towed pinger locator to aid in her roll in the search for missing Malaysia Airlines Flight MH370 in Perth, Australia, Sunday, March 30, 2014. The Australian warship with an aircraft black box detector was set to depart Sunday to join the search. It will still take three to four days for the ship, the Ocean Shield, to reach the search zone ? an area roughly the size of Poland about 1,850 kilometers (1,150 miles) to the west of Australia. (AP Photo/Rob Griffith)
A towed pinger locator sits on the wharf ready to be fitted to the defense ship Ocean Shield to aid in her roll in the search for missing Malaysia Airlines Flight MH370 in Perth, Australia, Sunday, March 30, 2014. The Australian warship with an aircraft black box detector was set to depart Sunday to join the search. It will still take three to four days for the ship, the Ocean Shield, to reach the search zone ? an area roughly the size of Poland about 1,850 kilometers (1,150 miles) to the west of Australia.(AP Photo/Rob Griffith)
U.S. Navy captain Mark Matthews holds up part of the towed pinned locator as he speaks at a press conference at naval base HMAS Stirling about the defense ship Ocean Shield and her roll in the search for missing Malaysia Airlines Flight MH370 in Perth, Australia, Sunday, March 30, 2014. The towed pinned locator is designed to locate the ping signal emitted by the black box onboard aircraft and authorities hope it will aid in the search for MH370.(AP Photo/Rob Griffith)
Malaysian officials show Chinese relatives of passengers on the missing Malaysia Airlines flight MH370 the new search area at the Metro Park Hotel in Beijing on March 28, 2014. Relatives of the Chinese passengers aboard missing Malaysia Airlines flight MH370 have demanded China mount its own inquiry into the disappearance, a letter shows. The document, sent to Beijing's special envoy in Kuala Lumpur, denounced Malaysia's handling of the search and asked the Chinese government to set up its own 'investigation office'. AFP PHOTO/Mark RALSTON (Photo credit should read MARK RALSTON/AFP/Getty Images)

Photo posted to Twitter by China's CCTVNEWS of an object spotted and photographed in the new Flight MH370 search area on Friday, March 28, 2014.

The tweet read:

Picture: suspicious object spotted by New Zealand military plane on Friday. #MH370 http://t.co/KWCt1zrv2k

INDIAN OCEAN - This handout Satellite image made available by the AMSA (Australian Maritime Safety Authority) shows a map of the new search area in the Indian Ocean for missing Malaysian Airlines Flight MH370 on March 28, 2014. The revised search area, 680 miles to the north of previous searches, comes after a new radar analysis suggests the jetliner may have run out of fuel sooner than first believed.
Messages from schoolchildren to Chinese relatives of passengers on the missing Malaysia Airlines flight MH370 at the Metro Park Hotel in Beijing on March 28, 2014. Relatives of the Chinese passengers aboard missing Malaysia Airlines flight MH370 have demanded China mount its own inquiry into the disappearance, a letter shows. The document, sent to Beijing's special envoy in Kuala Lumpur, denounced Malaysia's handling of the search and asked the Chinese government to set up its own 'investigation office'. AFP PHOTO/Mark RALSTON (Photo credit should read MARK RALSTON/AFP/Getty Images)
In this imagery taken by the Thaichote satellite on March 24, 2014 and released March 27, 2014 by Geo-Informatics and Space Technology Development Agency (GISTDA), a part of about 300 objects floating in the Indian Ocean near the search area for the missing jetliner are shown. Anond Snidvongs, director of Thailand's space technology development agency, said the images showed "300 objects of various sizes" in the southern Indian Ocean about 2,700 kilometers (1,675 miles) southwest of Perth, Australia. (AP Photo/Geo-Informatics and Space Technology Development Agency)
A navigation screen used by pilots aboard a Royal Australian Air Force AP-3C Orion aircraft shows their current location represented by a white circle during a search operation of the missing Malaysian Airlines flight MH370 over the southern Indian Ocean, Thursday, March 27, 2014. Planes and ships searching for debris suspected of being from the downed Malaysia Airlines jetliner failed to find any Thursday before bad weather cut their hunt short in a setback that came as Thailand said its satellite had spotted even more suspect objects. (AP Photo/Michael Martina, Pool)
A representative of relatives of Chinese passengers onboard Malaysia Airlines Flight 370, center, makes an announcement to journalists prior to a briefing with Malaysian officials at a hotel in Beijing, China, Wednesday, March 26, 2014. About two-thirds of the missing, 239 people onboard, are Chinese, and their relatives have lashed out at Malaysia for essentially declaring their family members dead without any physical evidence of the plane's remains. (AP Photo/Alexander F. Yuan)
A Pilatus PC-9/A comes in for a landing at RAAF Base Pearce in Perth, Australia, Wednesday, March 26, 2014. RAAF Pearce is accommodating six nation that have joined forces Australia, New Zealand the US, Japan and Korea making this join venture one of the largest maritime search operations in history to find debris from the missing Malaysia Airlines Flight MH370 .(AP Photo/Rob Griffith/Pool)
Malaysian Minister of Defence and Acting Transport Minister Hishammuddin Hussein shows pictures of possible debris during his statement on the missing Malaysia Airlines flight MH370 at the Putra World Trade Center (PWTC) in Kuala Lumpur on March 26, 2014. Malaysia drew criticism on March 25 for its announcement that the missing passenger jet had been lost at sea, even before any wreckage was found. AFP PHOTO / MOHD RASFAN (Photo credit should read MOHD RASFAN/AFP/Getty Images)
A Japan Maritime Self-Defense Force AP-3C Orion arrives back at RAAF Base Peace at Bullsbrook, some 35 kms north of Perth after continuing the search for debris or wreckage of the missing Malaysia Airlines Flight MH370 in the Indian Ocean, on March 26, 2014. Six countries have joined the search for the missing plane believed to have crashed in the southern Indian Ocean. AFP PHOTO/POOL/ROB GRIFFITH (Photo credit should read ROB GRIFFITH/AFP/Getty Images)
This graphic released by the Malaysian Remote Sensing Agency on Wednesday March 26, 2014, shows satellite imagery taken on March 23, 2014, with the approximate positions of objects seen floating in the southern Indian Ocean in the search zone for the missing Malaysia Airlines Flight 370. Malaysian Defense Minister Hishammuddin Hussein said at a news conference in Kuala Lumpur Wednesday that a satellite has captured images of 122 objects close to where three other satellites previously detected objects. (AP Photo/Malaysian Remote Sensing Agency)
This graphic released by the Malaysian Remote Sensing Agency on Wednesday, March 26, 2014, shows the approximate position of objects seen floating in the southern Indian Ocean in the search zone for the missing Malaysia Airlines flight MH370. Malaysian Defense Minister Hishammuddin Hussein said at a news conference in Kuala Lumpur, Wednesday that a satellite has captured images of 122 objects close to where three other satellites previously detected objects. (AP Photo/Malaysian Remote Sensing Agency)
Lt. Gen. Ackbal Abdul Samad, Malaysian Air Force Air Operation Commander, answers a question from relatives of Chinese passengers on board Malaysia Airlines Flight 370, while the projection shows a graphic of the flight's possible crash area, during a briefing meeting at a hotel in Beijing, China, Wednesday, March 26, 2014. The search of the missing Malaysian airliner resumed Wednesday after fierce winds and high waves forced crews to take a break Tuesday. A total of 12 planes and five ships from the United States, China, Japan, South Korea, Australia and New Zealand were participating in the search, hoping to find even a single piece of the jet that could offer tangible evidence of a crash and provide clues to find the rest of the wreckage. (AP Photo/Alexander F. Yuan)
In this Monday, March 24, 2014 photo, a crew member on board an RAAF AP-3C Orion aircraft looks at a radar screen whilst searching for missing Malaysia Airlines Flight MH370 over the Indian Ocean. After 17 days of desperation and doubt over the missing Malaysia Airlines jet, Malaysian officials on Monday said an analysis of satellite data points to a "heartbreaking" conclusion: Flight 370 met its end in the southern reaches of the Indian Ocean, and none of those aboard survived. (AP Photo/Richard Wainwright, Pool)
A Malaysia Airlines plane (below) prepares to go onto the runway and pass by a stationary Chinese Ilyushin 76 aircraft (top) at Perth International Airport on March 25, 2014. Wild weather halted the search on March 25 for wreckage from the Malaysia Airlines jet that crashed into the Indian Ocean, frustrating attempts to determine why it veered off course and bring closure to grieving relatives. AFP PHOTO / POOL / Greg WOOD (Photo credit should read GREG WOOD/AFP/Getty Images)
FILE - In this March 25, 2014 file photo, Australia's Defense Minister David Johnston, center, speaks to the media about developments in the search for the missing Malaysia Airlines Flight 370 in Perth, Australia. Not one object has been recovered from the missing airliner that Malaysian officials are now convinced plunged into the southern Indian Ocean 17 days ago. Australian Defense Minister Johnston said, ?The turning point for us, I think, will be when we pull some piece of debris from the surface of the ocean and positively identify it as being part of the aircraft.? (AP Photo/Rob Griffith, File)
Malaysia's Prime Minister Najib Razak , left, and acting transport minister Hishammuddin Hussein speak during the press conference for the missing Malaysia Airlines jet, MH370, at Putra World Trade Centre (PWTC) in Kuala Lumpur, Malaysia, Monday, March 24, 2014. Malaysian Prime Minister Najib Razak says a new analysis of satellite data indicates the missing Malaysia Airlines plane plunged into a remote corner of the Indian Ocean. The news is a major breakthrough in the unprecedented two-week struggle to find out what happened to Flight 370, which disappeared shortly after takeoff from Kuala Lumpur to Beijing with 239 passengers and crew aboard on March 8. (AP Photo/Vincent Thian)
Malaysia's Prime Minister Najib Razak speaks during the press conference for the missing Malaysia Airline, MH370 at Putra World Trade Centre (PWTC) in Kuala Lumpur, Malaysia, Monday, March 24, 2014. Razak says new data show missing plane plunged into southern Indian Ocean. (AP Photo/Vincent Thian)
Updated search map in hunt for missing Flight MH370 on Monday, March 24, 2014.
A ground controller guides a Royal Australian Air Force AP-3C Orion to rest after sunset upon its return from a search for the missing Malaysia Airlines flight MH370 over the Indian Ocean, at the Royal Australian Air Force base Pearce in Perth, Monday, March 24, 2014. Satellite images released by Australia and China had earlier identified possible debris in an area that may be linked to the disappearance of the flight on March 8 with 239 people aboard. (AP Photo/Jason Reed, Pool)
Maps show search areas for missing Malaysia Airlines missing jet.
Satellite image shared with Australian officials by China in the search for Flight MH370 on Saturday, March 22, 2014.
A ground controller guides a Royal Australian Air Force AP-3C Orion to rest after sunset upon its return from a search for the missing Malaysia Airlines flight MH370 over the Indian Ocean, at the Royal Australian Air Force base Pearce in Perth, Monday, March 24, 2014. Satellite images released by Australia and China had earlier identified possible debris in an area that may be linked to the disappearance of the flight on March 8 with 239 people aboard. (AP Photo/Jason Reed, Pool)
Mike Barton, rescue coordination chief, right, shows Australia's Deputy Prime Minister, Warren Truss, the map of the Indian Ocean search areas at the rescue coordination center of Australian Maritime Safety Authority in Canberra, Sunday, March 23, 2014. Planes and ships scrambled Sunday to find a pallet and other debris in a remote patch of the southern Indian Ocean to determine whether the objects were from the Malaysia Airlines jet that has been missing for more than two weeks. (AP Photo/Graham Tidy, Pool)
Mike Barton, rescue coordination chief, left, looks over the maps of the Indian Ocean with Alan Lloyd, manager of search and rescue operations at the Australian Maritime Safety Authority's rescue coordination center in Canberra, March 23. 2014. Planes and a ship scrambled Sunday to find a pallet and other debris in a remote patch of the southern Indian Ocean to determine whether the objects were from the Malaysia Airlines jet that has been missing for more than two weeks.(AP Photo/Graham Tidy, Pool)
A Japan Maritime Self-Defense Force P-3C Orion takes off from the Royal Australian Air Force Pearce Base to commence a search for possible debris from the missing Malaysia Airlines flight MH370, in Perth, Australia, Monday, March 24, 2014. Satellite images released by Australia and China had earlier identified possible debris in an area that may be linked to the disappearance of the flight on March 8 with 239 people aboard. (AP Photo/Paul Kane, Pool)
Japan Maritime Self-Defense Force's P-3C Orion aircraft sits on the tarmac after arriving at Royal Australian Air Force Pearce Base to help with search operations for the missing Malaysia Airlines Flight MH370, in Perth, Australia, Sunday, March 23, 2014. (AP Photo/Rob Griffith, Pool)
A woman walks past a message board for passengers aboard a missing Malaysia Airlines plane, at a shopping mall in Kuala Lumpur, Malaysia, Sunday, March 23, 2014. Planes and ships scrambled Sunday to find a pallet and other debris in a remote patch of the southern Indian Ocean to determine whether the objects were from the Malaysia Airlines jet that has been missing for more than two weeks. (AP Photo/Lai Seng Sin)
A Chinese woman takes a photo of a message board set up by relatives of passengers from the missing Malaysia Airlines flight MH370 at Metro Park Lido Hotel in Beijing on March 24, 2014. Ships and planes from several nations swarmed over the southern Indian Ocean on March 24 as mounting evidence of floating debris energised the search for Malaysia's missing passenger jet. AFP PHOTO/GOH CHAI HIN (Photo credit should read GOH CHAI HIN/AFP/Getty Images)
Australia's deputy prime minister said the search for missing Malaysia Airlines Flight MH370 cannot go on forever, and discussions are already under way between Australia, China and Malaysia as to whether to call off the hunt within weeks. No trace has been found of the Boeing 777 aircraft, which disappeared a year ago this week carrying 239 passengers and crew, in what has become one of the greatest mysteries in aviation history.
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Experts involved in past deep water searches say the search to find MH370 could easily miss the plane as Dutch company Fugro NV, the firm at the forefront of the mission, is using inappropriate technology for some terrain and inexperienced personnel for the highly specialized task of hunting man-made objects.

Heightening concerns, Australian authorities said on Wednesday that another search vessel, the Go Phoenix, which is using the world's best deep sea search equipment and crew provided by U.S. firm Phoenix International Holdings Inc, would pull out within weeks. No reason was given for withdrawing the vessel from the quest.

"Fugro is a big company but they don't have any experience in this kind of search and it's really a very specialized job," said Paul-Henry Nargeolet, a former French naval officer who was hired by France's air accident investigation agency BEA to co-ordinate the search and recovery of Air France Flight AF447 in 2009.

"This is a big job," Nargeolet told Reuters. "I'm not an Australian taxpayer, but if I was, I would be very mad to see money being spent like that."

Fugro, which was contracted by the Australian government to operate three ships pulling sonar across the vast 60,000-km search zone, has rejected claims it is using the wrong equipment, saying its gear is rigorously tested.

Still, Nargeolet's concerns are echoed by others in the tightly held deepsea search and rescue industry, who are worried that unless the search ships pass right over any wreckage the sonar scanning either side of the vessels won't pick it up.

Experts also question the lack of data released by the Australian Transport Safety Bureau (ATSB) on the activities of the Fugro ships.

Three of the bidders rejected for the MH370 contract, U.S. firm Williamson & Associates, France's ixBlue SAS and Mauritius-based Deep Ocean Search Ltd, have taken the unusual step of detailing their concerns - months down the track - directly to Australian authorities in correspondence viewed by Reuters.

Several other experts are also critical, including some who requested anonymity, citing the close knit nature of the industry which has just a few companies and militaries capable of conducting deepwater searches.

"I have serious concerns that the MH370 search operation may not be able to convincingly demonstrate that 100 percent sea floor coverage is being achieved," Mike Williamson, founder and president of Williamson & Associates told Reuters.

DIVING INTO THE UNKNOWN

Australia took over the search for the missing plane from Malaysia in late March last year, three weeks after MH370 disappeared off the radar during a flight from Kuala Lumpur to Beijing.

The search area was determined by satellite data that revealed the plane turned back sharply over the Malaysian Peninsula and flew undetected for another six hours before crashing into the inhospitable southern Indian Ocean.

The unchartered waters, buffeted by the Roaring Forties winds, stretch as deep as 6 km, hiding old volcanoes and cliffs in their depths. Australia, Malaysia and China earlier this month agreed to double the search area to 120,000 sq km.

Whether Phoenix International, which has U.S. navy contracts and found AF447, will be part of that extended search area is unclear after the ATSB said that Go Phoenix, owned by Australian firm Go Marine, will cease operating on June 19. Phoenix International, which was contracted separately by the Malaysian government, did not immediately return calls about its position. The Malaysian government also did not reply to requests for comment.

Two of the Fugro ships traverse up and down 2.4 km-wide strips of the sea floor, pulling via a cable a "towfish" that contains sonar equipment, in a technique often called "mowing the lawn".

The towfish coasts around 100 meters above the sea floor, sending out sound waves diagonally across a swath, or broad strip, to produce a flattened image of the seabed.

The Fugro ships are using sonar provided by EdgeTech, the same U.S. company whose sonar was used successfully to find Air France AF447 after it crashed in the Atlantic Ocean.

However, experts say while the type of sonar equipment being used by Fugro gives good results in flat surfaces, it is less well-suited to rugged underwater terrain, a world of confusing shadows.

The ATSB has routinely released detailed data from Go Phoenix, but has not done so for the Fugro ships. Experts have cobbled together an analysis from glimpses of the sonar use and data in videos and images posted to the ATSB website. From that, they've gauged the EdgeTech sonars are operating at swathes beyond their optimum capabilities, resulting in poor quality images and leaving side gaps in coverage.

"It makes no sense to be using fine scale tools to cover a massive area; it is like mowing an entire wheat field with a household lawnmower," said Rob McCallum, a vice-president at Williamson & Associates.

Fugro deputy managing director Paul Kennedy said the sonar is running within its capabilities, noting the system identified

five "debris-like" objects in 700-metre deep water at a test range off the West Australian coast.

"The test range gives us full confidence the sonars will see the debris field when we cross it," he said.

WILD WEATHER

Fugro is known for its expertise in high-quality low-resolution mapping of sea floors but has far less experience than some of the rejected bidders in deepwater aircraft searches. It has been involved in 17 search and recovery efforts for aircraft or ships over 15 years, compared with some of the bidders who search for 4-5 aircraft every year.

Kennedy pointed to the find earlier this month of a previously uncharted shipwreck as evidence Fugro was capable of finding the plane.

Concerning experts further is the fact that the third Fugro vessel, which was being used to scan the gaps between the other two ships with an autonomous underwater vehicle (AUV), was this month taken out of action because of encroaching wild winter weather.

That leaves the daily search without an AUV, a much more nimble piece of equipment that was vital in successful search for AF447.

"We are continuously reviewing the search data as it comes in and we are satisfied that the coverage and detection standards we have specified are being met or exceeded," ATSB Chief Commissioner Martin Dolan said in an email.

54 PHOTOS
Missing Flight MH370 April 7 going forward
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All at sea: Australia's search for MH370 under scrutiny
In this map provided on Thursday, June 26, 2014, by the Joint Agency Coordination Centre, details are presented in the search for the missing Malaysia Airlines Flight 370 in the southern Indian Ocean. Australian officials say the hunt for the missing plane that vanished during a flight from Kuala Lumpur to Beijing on March 8 with 239 passengers and crew aboard will shift farther south of the most recent suspected crash site in a remote stretch of Indian Ocean. (AP Photo/Joint Agency Coordination Centre) EDITORIAL USE ONLY
This photo illustration shows a journalist looking on the data communication logs from British satellite operator Inmarsat and released by Malaysia's Department of Civil Aviation (DCA) in Kuala Lumpur on missing Malaysia Airlines flight MH370 on May 27, 2014. Malaysia's aviation authority released on May 27 the satellite data used to determine that flight MH370 went down in the southern Indian Ocean following demands from sceptical relatives of those on board. AFP PHOTO / MOHD RASFAN (Photo credit should read MOHD RASFAN/AFP/Getty Images)
A man stands in front of a billboard in support of missing Malaysia Airlines flight MH370 as Chinese relatives of passengers on the missing Malaysia Airlines flight MH370 have a meeting at the Metro Park Hotel in Beijing on April 23, 2014. The hunt for physical evidence that the Malaysia Airlines jet crashed in the Indian Ocean more than three weeks ago has turned up nothing, despite a massive operation involving seven countries and repeated sightings of suspected debris.. AFP PHOTO / WANG ZHAO (Photo credit should read WANG ZHAO/AFP/Getty Images)
In this picture taken May 14, 2014 a Malaysia Airlines staff walks up to a flight prior to departure at the Kuala Lumpur International Airport in Sepang. Malaysia Airlines is expected to announce its first quarter earnings after a bruising period since Flight 370 vanished. AFP PHOTO/ Manan VATSYAYANA. (Photo credit should read MANAN VATSYAYANA/AFP/Getty Images)
In this photo taken on May 5, 2014 the Phoenix Autonomous Underwater Vehicle Artemis Bluefin-21, is shown on the deck of the Australian navy ship Ocean Shield berthed at Fleet Base West near Perth as it prepared to resupply and undertake routine maintenance. Ocean Shield, with the Autonomous Underwater Vehicle on board, was due to head back on May 10 to the remote area of ocean off Western Australia to continue searching for missing Malaysia Airlines Flight MH370. AFP PHOTO / Greg WOOD (Photo credit should read GREG WOOD/AFP/Getty Images)
The attached map shows MH370’s flight path, based on the best available knowledge of the investigation team. There are a number of possible flight paths to the southern Indian Ocean, and three boxes indicating where MH370 likely ended. These flight paths differ based on different projections of the aircraft’s speed, shown on the map in knots.
The attached map shows MH370’s flight path, based on the best available knowledge of the investigation team. There are a number of possible flight paths to the southern Indian Ocean, and three boxes indicating where MH370 likely ended. These flight paths differ based on different projections of the aircraft’s speed, shown on the map in knots.
The attached map shows MH370’s flight path, based on the best available knowledge of the investigation team. There are a number of possible flight paths to the southern Indian Ocean, and three boxes indicating where MH370 likely ended. These flight paths differ based on different projections of the aircraft’s speed, shown on the map in knots.

Photo of a map provided by GeoResonance, which claimed on Tuesday April 29, 2014, that it found wreckage thought to possibly be from missing Flight MH370. The photo was posted to Twitter by user Cristina Lombardi.

GeoResonance A graphic shows images depicting underwater "anomalies" suggesting deposits of various metals #MH370 http://t.co/qi2aUlzE1z

Photo of a map provided by GeoResonance, which claimed on Tuesday April 29, 2014, that it found wreckage thought to possibly be from missing Flight MH370. The photo was posted to Twitter by user Jickson Johnson.

Members of the Malaysia team involved in the search of the Malaysia Airlines MH370 brief relatives of Chinese passengers onboard the missing plane at a hotel in Beijing, China, Tuesday, April 29, 2014. The search team release snippets of the audio between the pilot and the control tower and answered questions relatives has regarding the satellite data used to determine the possible location of the plane. (AP Photo/Ng Han Guan)
PERTH, AUSTRALIA - APRIL 17: A South Korean P3 Orion aircraft takes off from Pearce Airbase, in Bullsbrook, 35 kms north of Perth to help in the search for missing Malaysia Airlines flight MH370 on April 17, 2014 in Perth, Australia. Twenty-six nations have been involved in the search for Malaysia Airlines Flight MH370 since it disappeared more than a month ago. The Malaysian Airways aircraft went missing on 8th March 2014 whilst on a flight between Kuala Lumpur and Beijing. (Photo by Greg Pool - Pool/Getty Images)
From left, Royal Australian Air Force Group Captain Craig Heap, Royal Australian Navy Rear Adm. Greg Sammut, Chris Birrer, Australian Defense Minister David Johnston, Japanese Defense Minister Itsunori Onodera, Japanese Ministry of Defence Director-General Hideshi Tokuchi, Japanese Joint Staff, Vice Chief of Staff Goro Matsumura, Japanese Consul General of Perth Koichi Funayama pose for a photo on the tarmac at RAAF Base Pearce before ahead of Japan's final search flight for the missing Malaysian Airlines flight MH370, Monday, April 28. 2014. Japanese Orion aircraft have logged 46 aerial search missions totaling approximately 400 hours of flight.(AP Photo/Emily Wang)
Ground crew watch as a Japanese P-3C Orion taxis along the tarmac at RAAF Base Pearce before departing for Japan's final search flight for the missing Malaysia Airlines flight MH370, Monday, April 28, 2014. Japanese Orion aircraft have logged 46 aerial search missions totaling approximately 400 hours of flight.(AP Photo/Emily Wang)
A relative of Chinese passengers onboard the Malaysia Airlines MH370 speaks to media as he and others wait for Malaysia embassy staff to meet them outside the Malaysia embassy in Beijing, China Friday, April 25, 2014. About 50 relatives of Chinese passengers on the plane continued a sit-in protest outside the Malaysian Embassy after officials failed to show up to update them on the search. (AP Photo/Andy Wong)
In this map provided on Wednesday, April 23, 2014, by the Joint Agency Coordination Centre, details are presented in the search for the missing Malaysia Airlines Flight 370 in the southern Indian Ocean. The hunt for the missing Malaysia Airlines jet will likely soon deploy more powerful sonar equipment that can delve deeper as the current search of the most likely crash site in the Indian Ocean has failed to yield any clues, Australia's defense minister said Wednesday. (AP Photo/Joint Agency Coordination Centre) EDITORIAL USE ONLY
Relatives of Chinese passengers onboard the Malaysia Airlines Flight 370, cry during a meeting in Beijing Monday, April 21, 2014. Relatives chanted slogans and shouted protests against the lack of meaning answers from Malaysian officials and Malaysia Airlines representatives. (AP Photo/Ng Han Guan)
Relatives of Chinese passengers on board the Malaysia Airlines Flight 370 raise their hands to show their agreement to a decision made during a meeting with Malaysia Airlines staff in Beijing Wednesday, April 23, 2014. Unidentified material that has washed ashore in southwestern Australia is being examined for any link to the lost Malaysian plane, authorities in Australia said Wednesday. (AP Photo/Ng Han Guan)
AT SEA - APRIL 17: In this handout image provided by Commonwealth of Australia, Department of Defence, Phoenix Autonomous Underwater Vehicle (AUV) Artemis begins its dive in the search for the missing Malaysia Airlines Flight MH370 on April 17, 2014. Twenty-six nations have been involved in the search for Malaysia Airlines Flight MH370 since it disappeared more than a month ago. The Malaysian Airways aircraft went missing on 8th March 2014 whilst on a flight between Kuala Lumpur and Beijing. (Photo by LSIS Bradley Darvill/Australia Department of Defence via Getty Images)
In this Monday, April 14, 2014, photo provided by the Australian Defense Force an autonomous underwater vehicle is deployed from ADV Ocean Shield in the search of the missing Malaysia Airlines Flight 370 in the southern Indian Ocean. The search area for the missing Malaysian jet has proved too deep for the robotic submarine which was hauled back to the surface of the Indian Ocean less than half way through its first seabed hunt for wreckage and the all-important black boxes, authorities said on Tuesday. (AP Photo/Australian Defense Force, Lt. Kelli Lunt) EDITORIAL USE ONLY Phoenix Autonomous Underwater Vehicle (AUV) Artemis is craned over the side of Australian Defence Vessel Ocean Shield in the search for missing flight MH370.
In this Monday, April 14, 2014, photo provided by the Australian Defense Force an autonomous underwater vehicle is deployed from ADV Ocean Shield in the search of the missing Malaysia Airlines Flight 370 in the southern Indian Ocean. The search area for the missing Malaysian jet has proved too deep for the robotic submarine which was hauled back to the surface of the Indian Ocean less than half way through its first seabed hunt for wreckage and the all-important black boxes, authorities said on Tuesday. (AP Photo/Australian Defense Force, Lt. Kelli Lunt) EDITORIAL USE ONLY Phoenix Autonomous Underwater Vehicle (AUV) Artemis is craned over the side of Australian Defence Vessel Ocean Shield in the search for missing flight MH370.
In this map provided on Tuesday, April 15, 2014, by the Joint Agency Coordination Centre details are presented in the search for the missing Malaysia Airlines Flight 370 in the southern Indian Ocean. The search area for the missing Malaysian jet has proved too deep for a robotic submarine which was hauled back to the surface of the Indian Ocean less than half way through its first seabed hunt for wreckage and the all-important black boxes, authorities said. (AP Photo/Joint Agency Coordination Centre) EDITORIAL USE ONLY
In this map provided on Monday, April 14, 2014, by the Joint Agency Coordination Centre details are presented in the search for the missing Malaysia Airlines Flight 370 in the southern Indian Ocean. The hunt for the missing Malaysian airliner continued on Monday to focus on a search for weakening radio signals from deep beneath the waves despite evidence mounting that the batteries in the plane’s all-important black boxes may finally have died. (AP Photo/Joint Agency Coordination Centre) EDITORIAL USE ONLY
In this photo taken from the Royal New Zealand air force (RNZAF) P-3K2-Orion aircraft, a RHIB (rigid hull inflatable boat) is deployed from the Australian ship HMAS Perth after it was guided into position by the RNZAF aircraft to recover a red object during a search operation for missing Malaysia Airlines Flight 370, in the Indian Ocean off the coast of western Australia on Sunday, April 13, 2014. The hunt for the missing Malaysian airliner continued to focus Monday on a search for weakening radio signals from deep beneath the waves despite mounting evidence that the batteries in the plane's all-important black boxes may finally have died.(AP Photo/Greg Wood, Pool)
KUALA LUMPUR, MALAYSIA - MARCH 26: Malaysia's Minister of Defence and acting Minister of Transport Hishammuddin Hussein (C) is viewed through a lens as he speaks during a press conference on March 26, 2014 in Kuala Lumpur, Malaysia. The search for flight MH370 resumes today after rought winds and high swells prevented crews from searching for debris yesterday. Six countries have joined the search, now considered to be a recovery effort, after authorities have announced that airliner crashed in the Southern Indian Ocean and that there are no survivors. (Photo by Rahman Roslan/Getty Images)
Malaysia's Minister of Defence and Acting Transport Minister, Hishammuddin Hussein (L) looks at maps as Director General of Civil Aviation Department (DCA) Azharuddin Abdul Rahman (R) answers questions during a press conference at a hotel near Kuala Lumpur International Airport in Sepang on March 17, 2013. An investigation into the pilots of missing Malaysia Airlines flight 370 intensified on March 17 after officials confirmed that the last words spoken from the cockpit came after a key signalling system was manually disabled. AFP PHOTO/ MANAN VATSYAYANA (Photo credit should read MANAN VATSYAYANA/AFP/Getty Images)
US navy captain Mark Matthews (C) speaks with journalists following a media conference involving Angus Houston, head of the Joint Agency Coordination Centre in Perth on April 9, 2014 on the search for missing Malaysia Airlines flight MH370. Australian ship Ocean Shield detected two more signals on April 8 to match a pair of transmissions picked up earlier in the week that have been analysed as consistent with flight data recorder emissions, Angus Houston said. AFP PHOTO / POOL / Greg WOOD (Photo credit should read GREG WOOD/AFP/Getty Images)
Flight MH370's pilot, Capt. Zaharie Ahmad Shah
CANBERRA, AUSTRALIA - APRIL 10 : A handout image released by the Australian Maritime Safety Authority (AMSA) in Canberra, Australia, 10 April 2014, shows the search area and Sonobuoy search area where 14 planes and 13 ships are scouring a 57,923 square km area of ocean for the wreckage of flight MH370 on 10 April 2014.Flight MH370 went missing after losing radio contact with Malaysian and Vietnamese air traffic control after leaving Kuala Lumpur International Airport on March 8. The Beijing-bound flight carried 239 passengers including 12 flight crew from 14 different countries. (Photo by AMSA/Anadolu Agency/Getty Images)
Ben Pelletier, marine operations engineer for Bluefin Robotics, attempts to retrieve a submarine in Quincy, Mass., Wednesday, April 9, 2014. Bluefin Robotics shipped a version of their submarine to help locate the missing Malaysian Airlines Flight 370, by using its side-scan sonar. (AP Photo/Scott Eisen)
A submarine built by Bluefin Robotics is lowered into the water by systems engineer Cheryl Mierzwa in Quincy, Mass., Wednesday, April 9, 2014. Bluefin Robotics shipped a version of their submarine to help locate the missing Malaysian Airlines Flight 370, by using its side-scan sonar. (AP Photo/Scott Eisen)
Ben Pelletier, marine operations engineer for Bluefin Robotics, attempts to retrieve a submarine in Quincy, Mass., Wednesday, April 9, 2014. Bluefin Robotics shipped a version of their submarine to help locate the missing Malaysian Airlines Flight 370, by using its side-scan sonar. (AP Photo/Scott Eisen)
In this April 9, 2014 photo provided by the Australian Defense Force, a Royal Australian Air Force AP-3C Orion flies past Australian Defense vessel Ocean Shield on a mission to drop sonar buoys to assist in the acoustic search of the missing Malaysia Airlines Flight 370 in the southern Indian Ocean. The ship searching for the missing Malaysian jet has detected two more underwater signals that may be emanating from the aircraft's black boxes, and the Australian official in charge of the search expressed hope Wednesday that the plane's wreckage will soon be found. (AP Photo/Australian Defense Force, LSIS Bradley Darvill) EDITORIAL USE ONLY
This image provided by the Joint Agency Coordination Centre on Wednesday, April 9, 2014, shows a map indicating the locations of signals detected by vessels looking for signs of the missing Malaysia Airlines Flight 370 in the southern Indian Ocean. An Australian official overseeing the search for the missing Malaysia Airlines plane said underwater sounds picked up by equipment on an Australian navy ship are consistent with transmissions from black box recorders on a plane. (AP Photo/Joint Agency Coordination Centre) EDITORIAL USE ONLY
Angus Houston (2nd-L), head of the Joint Agency Coordination Centre leading the search for missing Malaysia Airlines flight MH370 speaks at a media conference in Perth on April 9, 2014. Australian ship Ocean Shield detected two more signals on April 8 to match a pair of transmissions picked up earlier in the week that have been analysed as consistent with flight data recorder emissions, Houston said. AFP PHOTO / POOL / Greg WOOD (Photo credit should read GREG WOOD/AFP/Getty Images)
A graphic of the area being searched for missing Malaysia Airlines flight MH370, is displayed during a media conference involving Angus Houston, head of the Joint Agency Coordination Centre in Perth on April 9, 2014. Australian ship Ocean Shield detected two more signals on April 8 to match a pair of transmissions picked up earlier in the week that have been analysed as consistent with flight data recorder emissions, Houston said. AFP PHOTO / POOL / Greg WOOD (Photo credit should read GREG WOOD/AFP/Getty Images)
In this April 7, 2014 photo provided by the Australian Defense Force Able Seaman Clearance Diver Michael Arnold is towed by a fast response craft from the Australian Defense's ship Ocean Shield as he scans the water for debris of the missing Malaysia Airlines Flight 370 in the southern Indian Ocean. Up to 14 planes and as many ships were focusing on a single search area covering 77, 580 square kilometers (29,954 square miles) of ocean, 2,270 kilometers (1,400 miles) northwest of the Australian west coast city of Perth, Australia. (AP Photo/Australian Defense Force, Lt. Ryan Davis) EDITORIAL USE ONLY
In this April 7, 2014 photo provided by the Australian Defense Force Able Seaman Clearance Divers Matthew Johnston, right, and Michael Arnold, from the Australian Defense Vessel Ocean Shield, scan the water for debris from the missing Malaysia Airlines Flight 370 in the southern Indian Ocean. Up to 14 planes and as many ships were focusing on a single search area covering 77, 580 square kilometers (29,954 square miles) of ocean, 2,270 kilometers (1,400 miles) northwest of the Australian west coast city of Perth, Australia. (AP Photo/Australian Defense Force, Lt. Ryan Davis) EDITORIAL USE ONLY
In this April 7, 2014 photo provided by the Australian Defense Force Able Seaman Clearance Diver Matthew Johnston is towed by a fast response craft from Australian Defense's ship Ocean Shield as he scans the water for debris of the missing Malaysia Airlines Flight 370 in the southern Indian Ocean. Up to 14 planes and as many ships were focusing on a single search area covering 77, 580 square kilometers (29,954 square miles) of ocean, 2,270 kilometers (1,400 miles) northwest of the Australian west coast city of Perth, Australia. (AP Photo/Australian Defense Force, Lt. Ryan Davis) EDITORIAL USE ONLY
In this April 7, 2014 photo provided by the Australian Defense Force Able Seaman Clearance Divers Matthew Johnston, right, and Michael Arnold, from the Australian Defense Vessel Ocean Shield, scan the water for debris from the missing Malaysia Airlines Flight 370 in the southern Indian Ocean. Up to 14 planes and as many ships were focusing on a single search area covering 77, 580 square kilometers (29,954 square miles) of ocean, 2,270 kilometers (1,400 miles) northwest of the Australian west coast city of Perth, Australia. (AP Photo/Australian Defense Force, Lt. Ryan Davis) EDITORIAL USE ONLY
In this April 7, 2014 photo provided by the Australian Defense Force a fast response craft manned by members from the Australian Defense's ship Ocean Shield is deployed to scan the water for debris of missing Malaysia Airlines Flight 370 in the southern Indian Ocean. Up to 14 planes and as many ships were focusing on a single search area covering 77, 580 square kilometers (29,954 square miles) of ocean, 2,270 kilometers (1,400 miles) northwest of the Australian west coast city of Perth, Australia. (AP Photo/Australia Defense Force, LSIS Bradley Darvill) EDITORIAL USE ONLY
In this April 7, 2014 photo provided by the Australian Defense Force, a fast response craft manned by members from the Australian Defense's ship Ocean Shield tows Able Seaman Clearance Diver Michael Arnold as they scan the water for debris of the missing Malaysia Airlines Flight 370 in the southern Indian Ocean. Up to 14 planes and as many ships were focusing on a single search area covering 77, 580 square kilometers (29,954 square miles) of ocean, 2,270 kilometers (1,400 miles) northwest of the Australian west coast city of Perth, Australia. (AP Photo/Australian Defense Force, LSIS Bradley Darvill) EDITORIAL USE ONLY
Diagram shows three types of technology used in the search for Malaysia Airlines Flight 370
This image provided by the Joint Agency Coordination Centre on Monday, April 7, 2014, shows a map indicating the locations of search vessels looking for signs of the missing Malaysia Airlines Flight 370 in the southern Indian Ocean. An Australian official overseeing the search for the missing Malaysia Airlines plane said underwater sounds picked up by equipment on an Australian navy ship are consistent with transmissions from black box recorders on a plane. (AP Photo/Joint Agency Coordination Centre) EDITORIAL USE ONLY
Angus Houston, head of the Joint Agency Coordination Centre leading the search for missing Malaysia Airlines flight MH370, points to a graphic of the search area during a media conference in Perth on April 7, 2014. An Australian navy ship has detected new underwater signals consistent with aircraft black boxes, Houston said on April 7, describing it as the 'most promising lead' so far in the month-old hunt for missing Flight MH370. AFP PHOTO / Greg WOOD (Photo credit should read GREG WOOD/AFP/Getty Images)
FILE - In this Sunday, March 30, 2014 file photo, the Australian navy ship Ocean Shield lies docked at naval base HMAS Stirling while being fitted with a towed pinger locator to aid in her roll in the search for missing Malaysia Airlines Flight MH370 in Perth, Australia. Crews searching for the jet launched a targeted underwater hunt on Friday, April 4 for the plane's black boxes along a stretch of remote ocean, with just days left before the devices' batteries are expected to run out. The Ocean Shield, which is dragging a towed pinger locator from the U.S. Navy, and the British navy's HMS Echo, which has underwater search gear on board, will converge along a 240-kilometer (150-mile) track in a desolate patch of the southern Indian Ocean, said Angus Houston, the head of a joint agency coordinating the search. (AP Photo/Rob Griffith, File)
Angus Houston, head of the Joint Agency Coordination Centre leading the search for missing Malaysia Airlines flight MH370, displays a graphic of the search area during a media conference in Perth on April 7, 2014. An Australian navy ship has detected new underwater signals consistent with aircraft black boxes, Houston said on April 7, describing it as the 'most promising lead' so far in the month-old hunt for missing Flight MH370. AFP PHOTO / Greg WOOD (Photo credit should read GREG WOOD/AFP/Getty Images)
Map shows search areas for missing Malaysia Airlines missing jet.; 3c x 5 inches; 146 mm x 127 mm;
A Chinese relative of passengers aboard Malaysia Airlines Flight 370 cries during a mass prayer for the missing plane, in Kuala Lumpur, Malaysia, Sunday, April 6, 2014. The head of the multinational search for the missing Malaysia airlines jet said that electronic pulses reportedly picked up by a Chinese ship are an encouraging sign but stresses they are not yet verified. (AP Photo/Lai Seng Sin)
Chinese Ilyushin IL-76 aircraft flies over Perth towards the international airport returning from search operations for the missing Malaysia Airlines Flight MH370 in Perth, Australia, Sunday, April 6, 2014. Retired Australian Air Chief Marshall Angus Houston, the head of the multinational search, confirmed that a Chinese ship had picked up electronic pulsing signals twice in a small patch of the search zone, once on Friday and again on Saturday, but he stressed the signals had not been verified as linked to the missing plane. (AP Photo/Rob Griffith)
A Chinese Ilyushin IL-76s aircraft taxies past another parked on the tarmac at Perth International Airport after returning from search operations for wreckage and debris of the missing Malaysia Airlines Flight MH370, in Perth, Australia, Monday, April 7, 2014. It’s not a question most governments involved in the hunt for Flight 370 care to answer: How much has the far-flung, month-long search cost? Several Chinese ships and planes have been involved in the search, but China’s foreign ministry did not respond to questions about the expense of the effort. (AP Photo/Rob Griffith)
A man places a LED candle after a mass prayer for passengers onboard the missing Malaysia Airlines Flight MH370, in Kuala Lumpur, Malaysia, Sunday, April 6, 2014. The head of the multinational search for the missing Malaysia airlines jet said that electronic pulses reportedly picked up by a Chinese ship are an encouraging sign but stresses they are not yet verified. (AP Photo/Lai Seng Sin)
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