NEW DELHI - The Indian government has launched a 3.5 billion rupee ($700 million) project to set up radar sensors along the country"s coastlines for surveillance to prevent terrorists from entering the country, reported the Press Trust of India on Sunday.

The chain of radar sensors along the entire 7,517 km coastline, the Andaman and Nicobar Islands and Lakshadweep in the Indian Ocean is being set up by the Coast Guard under a Home Ministry scheme, said the report.

The radar sensors will be fitted on light houses at 46 locations, out of which 36 are in mainland India, six in Lakshadweep Islands in the Arabian Sea and four in the Andaman and Nicobar Islands in the Bay of Bengal, said the report.
Radar sensors use Frequency Modulated Continuous Wave to reliably detect moving or stationary objects even in extreme weather conditions, according to the report.

Ten terrorists entered Mumbai from the sea in late 2008 to launch a spectacular attack upon the city.