A white film slips over your vision. Strangely, your eyes seem more focused and you note barely perceptible traces of passage that you had missed before. If you fail a Survival check to track a creature while this spell functions, you can immediately attempt another roll against the same DC to re-establish the trail. If the reroll fails, you must search for the trail for 30 minutes (if outdoors) or 5 minutes (if indoors) before trying again. (3e Spell Compendium Pg.34)