How does SpaceX land so accurately on the barge?

asked 2016-05-06 11:50:55 -0600

Pascal Le Dramont gravatar image

updated 2016-05-06 13:01:34 -0600

Rob Mueller gravatar image

How does the Falcon 9 rocket first stage land so accurately on the barge in the Atlantic ocean? Do they use GPS or some beacon system?

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