NorthStar 957 Operator's Manual page 119

Chapter 8 - Understanding Waypoint/Route Navigation
To restart your course line from your present position, display
either the NAV LOG screen (by pressing the NAV LOG key) or
the CHART screen's vessel mode (by pressing the CHART key,
then the VESSEL key), then press the RESTART menu key
and the ENTER key. If you're on the chart screen, you must
first press the vessel key
The 957 recalculates the course line to go from your present
position directly to the next waypoint, and resets your
cross-track error to zero.
957 Operator's Manual, Rev. B Page 111