Start your walk at the trailhead at S 35° 23.750 E 149° 00.730 and enjoy the walk along the well-maintained track from Kambah Pool that goes all the way to Casuarina Sands. When you get to the posted co-ordinates (about a 3km walk) have a seat on the provided bench and then make the following observations:
A = The number of logs making up the seat part of the bench (the part you put your bum on)
B = The number of logs making up the back rest of the bench
C = The number of logs parallel to, but behind the back rest
If the type of fastener is a Phillips head D = 1
If the type of fastener is a hex head D = 2
If the type of fastener is a bolt D = 3
There are two letters on each fastener head. E = The alphabet letter value of the of the larger one, where A=1, B=2 ... Z=26
Then find the cache using the following formula: S35° 22.B(A+B)D' E149° 0.CCE
Checksums: S24 E30