1) Proceed to the above coordinates.
There you will find four years listed.
Read the years left to right and top to bottom (Y1, Y2, Y3, Y4).
Now, let A=Y2-Y1 and B=Y4-Y3.
Find C=2A-B+3 and D=5A-6B+2.
Step 2 is at coordinates offset from the original by
N(+0 0.C) and W(-0 0.D).
Proceed to the second coordinates.
2) Look for a metal sign and find the last number listed.
Decode as follows:
Let P= first three digits, and Q=last three digits
Now, R=(Q-3)/10+5 and S=P/3-11
(make sure R and S are 3 digits long)
Step 3 is at coordinates offset from step 2 by
N(+0 0.R) and W(-0. 0.S)
Proceed to the third coordinates.
3) Find ammo can with trade items and log book.
enjoy the walk back and the views.