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    Navigate using seafloor data
    From: John D. Howard
    Date: 2017 Sep 15, 07:33 -0700

     Hello,

    With all the talk of Cel-Nav as a backup to GPS for Navy ships is there is a different way that would be secure?

    Cruise missles can find their target by following a very detailed profile of the ground.  Could a data base be made of the sea floor that would tell a ship where it is?  The old pilot books would make refrence to depth, type of seabed material, and the like - throw a lead over and see.  It seems to me that a detailed profile map of the seafloor could be made as an aid to navigation.

    There are already very good INS systems but they need to be updated from time to time because of progression.  I think a seabed scan compared to a profile could be used.

    Any thoughts?

    John H.

       
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