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- Import the seismic line without navigation. Seismic Data > Import > SEGY 2D
- Make sure the seismic settings are correct as in a standard import scenario.
- Change the byte position (Byte pos.) for X so that all coordinates are 0. This is not strictly necessary, but it will stress the fact that you want to assign navigation later.
- Scan the file ensuring you have all coordinates at 0 (example below).
- Execute to import seismic without navigation
- Import the seismic line's navigation separately. Generic > Import > SEGY 2D navigation
- Copy the settings from 1a above
- Execute to import navigation
- Remove multiples from navigation.
- Poly Data > Make Active
- In Toolbox' Shell and Workspace pane enter mak cle
- Poly Data > Assign from workspace > active
- Assign the navigation to the seismic line. Seismic Line > Seismic Operations > Assign Navigation