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Navigation system

  • US 6,125,326 A
  • Filed: 09/19/1997
  • Issued: 09/26/2000
  • Est. Priority Date: 09/30/1996
  • Status: Expired due to Term
First Claim
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1. A navigation system comprising:

  • a main navigation apparatus, which is fixed to a vehicle and run by a vehicle electric source, including;

    a main display;

    main storage means for storing various kinds of information including map information; and

    a main navigation unit for calculating current position data of the vehicle and outputting the calculated current position data to said main display together with the map information; and

    a sub-navigation apparatus, which is detachable from the vehicle, including;

    information output means for outputting information;

    sub-storage means to which information is written;

    an electric source for exclusive use by said sub-navigation apparatus; and

    a sub-navigation unit for providing current position data via said information output means,wherein operation switches used for operating said sub-navigation unit are integrally provided to said sub-navigation apparatus.

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