...
Stacking velocities can be imported with or without navigation using the ASCII reader. If the velocities are imported without navigation the reference to geographical position can later be restored by looking at the seismic line name and SP.
Without navigation
Example of stacking velocity import without navigation
Processing velocities with no navigation have no X's or Y's stored.This is a pre-set version of the ascii import dialogue set ready to read such stacking velocities. Note that the velocities are defined in time-vel pairs, where each analysis has several such pairs, and is locked to a SP and line reference.
...