If it is not found by then the data is unlikely to be recovered

If it is not found by then, the data is unlikely to be recovered.Many military aircraft already use data streaming, sending flight information real-time via satellite to ground stations.But the massive bandwidth and sophisticated infrastructure needed to manage and process data from tens of thousands of commercial flights per day could make it prohibitively expensive."There have been studies on this for years. All we have left is a very small set of messages," Hayden said, referring to the automated maintenance messages the A330-200 sent in its final moments, charting problems in all onboard systems.Data streaming may be able to supplement black boxes, but not replace them, L-3's Coffey said. "If you're not able to recover the black boxes, there are going to be a lot of questions that remain unanswered, that should be answered."But industry specialists want guarantees that the highly sensitive data -- in particular the cockpit conversations -- will be properly protected, and pilots' privacy preserved."There is a huge sensitivity among pilots at the thought of every utterance being recorded and transmitted to some faraway place," said AIA's Elwell. World France. (For the main story, click [ID:nDEL195441]) By Bappa Majumdar and Matthias Williams NEW DELHI, June 18 (Reuters) - Maoist rebels in India have killed 10 government supporters in West Bengal state this week and declared a "liberated zone" close to the city of Kolkata, sparking unease among investors in the communist-ruled state.

The attacks by the rebels, who are fighting for the rights of poor farmers and the disenfranchised, are among the most brazen in years. WHO ARE THE MAOISTS? The rebels began an armed struggle with a peasant revolt in Naxalbari village in West Bengal in 1967 but were initially crushed by the Congress-led government. After regrouping in the 1980s, they began recruiting hundreds of poor villagers, arming them with bows and arrows and even rifles snatched from police. Indian authorities say they are led by Koteshwar Rao, also known as Kishanjee, who is in charge of militant activities, and Ganapathi (one name), the political leader. Neither have been seen in public and remain hidden in dense forest bases.

HOW BIG IS THE MOVEMENT? The rebels have an estimated 22,000 combatants in more than 180 of the country's 630 districts. They operate across a "red corridor" stretching from the southern state of Andhra Pradesh to the central state of Chhattisgarh and into West Bengal. HOW BIG A THREAT ARE THEY TO INDIA'S STABILITY? Prime Minister Manmohan Singh has described the insurgency as the biggest internal security challenge since independence. More than 1,000 attacks were recorded in 2008, as the Maoists targeted politicians, police and villagers suspected of being informers. Authorities say the Maoists have a well thought-out plan to spread their influence into urban areas. Some of their recent attacks have been closer to cities and the latest strike in West Bengal is a show of their capability. Others say their influence will not extend far beyond remote rural areas.

WHAT ABOUT THE ECONOMY? The Maoists regularly attack railway lines and factories, aiming to cripple economic activity. Their base in the "red corridor" gives them control of some of India's mineral rich areas. The guerrillas could feed off the resistance in parts of rural India, including in West Bengal, against rapid economic growth that excludes hundreds of millions of poor. The rebels advance to Lalgarh in West Bengal is near the construction site of a $7 billion steel plant by India's third largest steel producer, JSW Steel Ltd (JSTL.BO), which is watching how the government tackles the violence. It could potentially scare off prospective investors from setting up shop in and around the Maoists' sphere. HOW DO THE MAOISTS GET ARMS? They are in touch with other militant groups operating in India, including groups in Kashmir and the northeast, who help them.