The co-ordinates that you will start with is not the location of the cache. The cache is hidden at S 29° 27.### E151° 36.###. When you get to the co-ordinates that you have been given there is a pole with a number on it to dial. The first number you see in the digits to dial is the first and third number of the remaining east co-ordinates. Also in the number to dial, the third digit is the last number of the south co-ordinates.
You then walk 11 metres down the hill to the next pole. There is a number that has QNP in front of it on the pole. Divide the first number after the P by three and that will give you the first number in the south co-ordinates.
Then walk 21 metres west towards the Glen Innes Road to the next pole. On the top of this pole is a mark reference number. This number gives you the second digit in the south co-ordinates and the second number in the east co-ordinates.
Now that you have collected all this information proceed to the location where the cache is hidden.