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    NavigateComponent 
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    Actors:
    Authoring, AR, RemoteUser 
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    Entry:
    Actor wants to view/manipulate model 
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    Flow
    of Events 
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    1.  Request entry of system if not already
    in 
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    2.  Call method to use for model
    manipulation 
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    3.  Exit system if done 
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    Exit:
    Actor is done manipulating model 
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    Special
    Requirements: Is system on local machine? 
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    Speed? 
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