Near the listed coordinates, use the land line phone number on the sign above the gate to calculate GZ
Phone number = ABCDEFGH
The cache is located at S41 08.UVW E146 09.XYZ
where
U = E + G
V = C + H
W = B + D
X = B + G - H
Y = C * B + H
Z = G - D
Check sums (decimals only): South = 20 East = 19 It is a short walk to the cache. Approach the cache from the river side.