This cache is not at the posted co-ordinates
This is a bonus cache for completing and solving the puzzle below from the Adventutre Lab Cache
"Perth Northern Beaches Meander"
To locate this bonus you will need to complete, and pay attention to the answers you give to successfully complete all 5 sections of the Adventure.
The cache can be found at:-
S 31 31.ABC E 115 36.DEF
A = At stage 1. "The wreck of the Alkimos": - What is the number value of the seventh letter plus one?
B = At stage 2. "Fisherman's Hollow": - What is the number value of the fourth letter minus one?
C = At stage 3. "Mary Lindsey Homestead": - What is the number value of the third letter minus one?
D = At stage 4. "AlexT Brown": - What is the number value of second letter plus one?
E = At stage 5. "Vergulde Draeck": - What is the second number in the first date?
F = At stage 5. "Vergulde Draeck": - What is the second number in the second date?

You can validate your puzzle solution with certitude.
Congratulations to .tbh for FTF honours.