Navigation is one of the most vital skills a survivalist needs. In this day and age, with all the smart phones, GPS and other technology we have, knowing how to use a compass and a map is a dying art.
But smart phones and GPS can fail. Their batteries can die, they can break, or they can be affected by an EMP. A map and compass, on the other hand, will never fail you. So long as you know how to read them, these two tools will get you anywhere you need to go. I can't emphasize enough what an important skill this is.