The cache is not at the listed coordinates.
"Kirk to Enterprise, ask Scotty to beam me up now."
"Sorry, Captain, but Scotty said he doesn't do beaming. Also our sensors indicate we have a cloaked Klingon bird of prey off our bow that's jamming our transporter."
"Show me."
"Can you enhance it?"
"How do I do that?"
"Find its reactor hotspot with your pointer."
"Okay, I have something, sending it now ... oh no, it's opening a wormhole and drawing us in, we're..."
"Kirk to Enterprise, do you receive? Where are you?"
"What's wrong, Captain?" asked the away team member in the red shirt.
"The Klingons have stolen our ship."
"Oh, that's not good, is it?"
Can you solve the puzzle and help Kirk find the Enterprise before the man in the red shirt dies? I'll give you a hint: it's somewhere on Kirks Hill in the Doyle Street Bushland Reserve. Approach from the trail head at the end of Doyle Street; don't try coming through the national park from the south as there's private property in between with locked gates, video surveillance and trained attack monsters.

The cache has a pencil and sharpener but bring a pen just in case, as it's a long (and steep) walk back to the car to get one.
Congratulations to FTF team novo who boldly went where no cacher has gone before!