Indian Navy subs can soon stay longer under water

Indian scientists have developed technology that will enable the navy's conventional non-nuclear submarines stay under water for up to two weeks before replenishing their oxygen supply, thus increasing their stealth capabilities.

"Conventional submarines usually need to come to the surface every three to four days for replenishing their oxygen supply," an official of the Defence Research and Development Organisation (DRDO), which has developed the Air Independent Propulsion (AIP) system, told IANS, speaking on condition of anonymity.

For the replenishment, a diesel submarine has to come to periscope depth and raise its snorkel, which makes it vulnerable to detection.

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