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US submarine`s periscope damaged in collision: Navy

Last Updated: Friday, January 11, 2013, 17:49

An attack submarine of the US Navy has collided with a small, civilian vessel in the Persian Gulf, damaging one of the sub`s periscopes but not harming anyone on either vessel, media reports said.

World`s longest periscope developed

Last Updated: Monday, August 22, 2011, 15:25

The indigenous periscope is the longest in the world and would be used in Prototype Fast Breeder Reactor.