The coordinates listed are for the first satellite (stage), here
you will find a metal tag with the coordinates for the next
satellite AND another number. You will need to write these down as
you will need them to find the cache.
At the next satellite there will be another tag with more
coordinates and numbers on it. Write these down as well.
At the third satellite you will find only a number.
Now for the fun part. A GPS reciever uses the distance from
satellites measured in time to calculate the position of the
reciever, the numbers you will have are the distance the cache is
from each satellite measured in feet. It is up to you to figure out
how to actually find the cache!
BTW if you like puzzles be sure to mark and keep the coordinates
of the final. You will need them when you graduate to
GC1YP0M - Trigonometree.