Tech gap exposed in search mission

Experts say more development needed in nation's advanced maritime equipment

China has the ability to detect signals sent from deep in the sea, but the month-long hunt for missing Malaysia Airlines flight MH370 has exposed technological drawbacks in China's maritime search and rescue outfit, experts said.

Chinese patrol ship Haixun 01 picked up electronic pulsing signals in the Indian Ocean on Friday and again on Saturday. But some foreign experts are skeptical about whether China's equipment is advanced enough to obtain signals from as deep as 4,500 meters under the sea.