Do not go to the posted coordinates unless you have a boat, there is nothing there for you to find.
You are looking for a ten digit number ABCDEFGHIJ
The final coordinates are
N 47 2K.XYZ'
W 122 3L.PQR
where:
X=H-2
Y=J-6
Z=E+1
K=B+2
P=H
Q=F+1
R=A+2
L=A+1
N uvag fubhyq abg or arprffnel qrcraqvat ba lbhe ntr ohg vs lbh fgvyy jnag bar whfg nfx.