Hidden somewhere nearby is a virtual needle (or zone) in a
haystack (The Oval). On finding the needle you will be given the
co-ordinates and hint for the matching geocache... Luck / logic may
mean that this takes five minutes...or a lot longer. On finding the
needle a dialog box will open and the tone that played when you
started the cartridge will replay (this, in theory means you can
concentrate on where you are walking rather than looking at your
screen). You do not need to go within 5m of a road.
A future version of the cartridge may have an alarm to indicate
a certain proximity to the needle. But that will only be if the
current version proves too hard. It is a D5 so you'll have to work
to earn those stars!
The cartridge can be downloaded
here. Wherigo home page link.
Additional Notes Think carefully about how to make a
methodical search. Minimum zone size is 20m by 20m. If you abandon
your search and reload the cart you will have to search from
scratch (bad needle pun!). Saving cart and returning to pick up a
started search has not been tested (start searching from scratch?).
Asking a previous finder probably won't yield useful
information.