> The sun is over there, a shadow would be that way, it's about 5 o'clock. That must be north! That works for example if you have a path and you're trying to f

> The sun is over there, a shadow would be that way, it's about 5 o'clock. That must be north! That works for example if you have a path and you're trying to find out which way goes north and which south, but a watch can give you an actual quantifiable bearing that is actionable if you have no other ground orientation.