Once at the posted coordinates you will see a sign.
ABCD = the 4 digit number following R.S.O. on the 5th line of the sign.
To determine the final coordinates do the following math:
N 43 51.[(A x 200) + (B x 36) - D]
W 079 14.[(D x 100) + (B x 39) + A]
The last digit in the north coordinates is 4 and the last digit in the west coordinates is 2.