How did a $3 billion US Navy submarine hit an undersea mountain?

Some submariners call the USS Connecticut the luxury sports car of submarines. It's a $3 billion piece of American military hardware that's fast and outfitted with the latest electronic gadgetry only available when price is not a consideration.

But despite its high cost and sophisticated tech, the United States Navy says the Seawolf-class nuclear-powered attack sub ran smack into an undersea mountain in the Pacific on October 2.

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"Submarining is hard, it's really hard. Not everything goes right all the time," said Thomas Shugart, who spent more than 11 years on US submarines, including commanding an attack sub

Surface ships or a sub operating at periscope depth can relay on global positioning satellites to give sailors a very accurate location, said Shugart, now an adjunct senior fellow at the Center for a New American Security.

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