This mod allows you to track down missing explorer notes.
Activate the tracker from opening your player radial wheel by holding R (X/Square for console).
Once activated an icon will appear on the HUD showing you the location and distance of the nearest explorer note.
If an explorer note cannot be found while the tracker is activated then it will keep actively scanning until one can be found.
Current Issues
Sometimes has issues tracking explorer notes if notes are too far away from you, unfortunately this is a limitation due to how notes are added to maps and there is no known way to work around this.