Historical significance of High Cross Park
During the nearby light rail construction, a World War II air raid shelter was uncovered during excavations at the park. The air raid shelter formed a part of the defence system of air raid shelters and zig-zagging anti-aircraft trenches, which were dug into open places such as parks. At the end of the war, the shelters and trenches were often backfilled, including the discovery at High Cross Park. This air raid trench in High Cross Park never saw any military action.
The cache is not at the posted coordinates.
At the posted coordinates you will see a number of plaques on the ground detailing the construction and use of air raid shelters. Read these plaques to determine your GZ.
Ignoring all punctuation.
A. On the plaque starting with "Keep cool" subtract the number of letters in the tenth word from the number of letters in the third word.
B. On the plaque ending with "fire" add the number of letters in the seventh word.
C. On the plaque containing the word "specifications" subtract the number of letters in the fifth word from the number of letters in the sixteenth word.
X. On the plaque containing the word "concussion" add the number of letters in the fifth word to the number of letters in the eight word.
Y. The number of letters in the eight word on the plaque containing the word "instructions".
Z. Add the number of letters in the sixth and ninth words on the plaque commencing with "Every Australian".
CALCULATIONS TO GET GZ COORDINATES:
S33 55.ABC E151 14.XYZ
CHECKSUM S = 19, E = 25
Congratulations to EverestHigh on his FTF.