The geocache is NOT located at the posted coordinates!
This is the bonus cache for completing the Sculptures of Shelter Island Adventure Lab. You will have the full set of coordinates to this cache when you complete all five stages of the Adventure Lab.
If you did not receive the final coordinates, go back into the Adventure Lab and click on the “View 5 Journal Entries” link near the bottom of the page. The final coordinates are listed on the last journal entry.
You're looking for a camoed container holding log only. Bring a pen.
Congratulations to FlagMan for getting FTF!!