Q. How can I reduce the GPS Height to VORF?

A. Based on the NPD-S files, you should be able to reduce to VORF like this:

  • Import NPD-S file
  • Calculate GPS-Tide on one of the GPS-Tide singlebeam channels:





  • Select the right VORF file 


  • Smooth the new GPS Tide relative to VORF



  • Export it 



  • Reimport into NaviEdit with Ascii Importer and link it to the SBD file without height reference.

  • You will probably need to set the Draft in the HeaderEditor