If they get a gps to the site, they might as well just ask google..."ok google, where is my partner?" Compass and azimuth is the only way they can do it and still keep credibility. Guessing that will be at their sites in 10-12 hours not days or weeks. Following a compass a d direction is the easiest thing...if they had to orient a map and find their own way that would be completely a different story.