This Magnetic Nano that you will need a tool to remove it with, a bit of steel 2 mm in diametre and 50 mm long will do the trick. Please take care to replace it in the same spot with the magnet facing up.
Your GPS should take you to the Parking Permit sign, which was the original home for this magnetic Nano. It is now about a metre away and around elbow height for most adults. A LRT would be handy to retrieve the log, and you will need to BYO pen.
This is a great spot to start a Beach walk from, or go for a ride or stroll along the dual purpose path. On weekends there is a mobile refreshment van so looking for this cache can be a great excuse for an nice little outing, just beware of muggles.