“Inevitably, if we don't find wreckage on the surface, we are eventually going to have to, probably, in consultation with everybody who has a stake in this, review what we do next.” An RAAF Orion on a low-level search for the missing Malaysia Airlines plane. Credit:AP Hopes of a breakthrough had been raised after the Australian Maritime Safety Authority revealed a new search area about 1100 kilometres north-east of the previous zones on Friday after analysis that the plane had been travelling faster than previously thought, and would therefore have burnt more fuel and crashed earlier. But Air Chief Marshal Houston, head of the new Joint Agency Coordination Centre (JACC), said this analysis - described last week as the “most credible” lead to date - was a “very inexact science”. “We don't know what altitude the aircraft was travelling at. We don't really know the speed it was going,” he said.

He said the ground speed of a plane travelling at sea level was half that of a plane travelling at 40,000 feet even if both aircraft had “the same indicated airspeed”. The hunt for debris: Warrant Officer Michael Wright uses scanners aboard an RAAF Orion aircraft. Credit:Reuters Air Chief Marshal Houston is a former Chief of Air Force and aviator who spent much of his career as a search and rescue helicopter pilot. With no wreckage found after three and a half weeks despite a multinational effort now involving nine ships, 10 aircraft and 1000 personnel, the search for flight MH370 was by far the most challenging he had come across, he said. 'Very inexact science': Angus Houston leaves Tuesday's news conference. Credit:Reuters

While noting that technology had advanced considerably, he compared the search for MH370 with the sinking of HMAS Sydney off the coast of Western Australia during World War II. “There were eyewitnesses who saw the ship disappear over the horizon but it took us about 60 years to find HMAS Sydney on the bottom of the ocean,” he said. A relative of a passenger on board the Malaysia Airlines flight MH370 talks to the media in Beijing. Credit:Getty Images Captain Allison Norris, commander of HMAS Success, told Fairfax Media that conditions were rough on Tuesday with high winds and swell of up to four metres. Nonetheless, her crew were scouring the ocean around the clock, using all available personnel on the vessel regardless of their normal jobs. Crew were using night vision equipment when it was dark, she added.

Air Chief Marshal Houston will brief Malaysia's Prime Minister Najib Razak on the search and recovery effort, with the leader scheduled to arrive in Perth on Wednesday. Mr Najib will tour RAAF Pearce with Prime Minister Tony Abbott, among other engagements during his two-day visit. Meanwhile, Danica Weeks, the wife of one of the 239 missing passengers and crew on MH370, arrived at RAAF Pearce on Tuesday and complained she was not getting enough information about the search and recovery operation. Air Chief Marshal Houston said he had given Ms Weeks his personal mobile number and invited her to come to JACC headquarters for a personal briefing. Meanwhile, a new ship will join the search by the weekend. DMS Seahorse Standard, a multipurpose vessel leased to the Australian navy, will join a flotilla of three other Australian vessels, six Chinese ships and the Malaysian frigate KD Leiku in the search.

DMS Seahorse Standard was involved in the hunt for the Australian Blackhawk helicopter that crashed off the Solomon Islands in 2007. Loading As well as the ships deployed, there were 10 aircraft in the search area 1850 kilometres west of Perth on Tuesday. Also, ADV Ocean Shield set sail from Fremantle and is expected to arrive in the search zone on Friday with its equipment in a bid to locate the aircraft's black box.





