Sentence:  If you have two or more people in your party, at least one of whom has some experience and a compass, you can implement a <WSD>point person</WSD> to guide you in the absence of recognizable landscape features. The <WSD>point person</WSD> acts as the group's reference point, trekking out in front of the designated navigator but remaining close enough to stay visible and communicate verbally, with the use of hand signals, or with a flashlight. 
Meaning of the word marked with <WSD> tags:  One who goes ahead of a group in order to indicate the direction in which it should move.