By Garry Stockton
Opening the Revit file directly in Navisworks
Go to Navisworks Menu and click on options. In File Readers section find Revit. You will have the same options as exporting from Revit, but in this case, you can choose the view to convert to be the one with the string ‘Navis’ in its name or the first 3D view.
Resulting NWC file
If the file has been created from Revit it will be an "independent" file and will be saved in a location set by you.
If the file has been created from Navisworks, the file remains linked to the Revit file. When opened, Navisworks checks whether the Revit model is newer than the NWC and if so, it will be regenerated.