Compared to the other training, I found the land nav course to be relatively low on the exertion scale. However, it was one of the few instances in which you would spend extensive periods of time alone. Anything could have happened...but I wouldn’t instantly blame the heat.
IIRC, during Beast the New Cadets were paired up. There wasn't seperate land nav until Buckner (sophmore year training for the non USMA guys here).
long grey line? what year? H-3 ‘91 here