There are plenty of strange and unusual hobbies out there that people do for enjoyment and to pass the time. Using multi million dollar satellites to find hidden bits of plastic and old mint tins is perfectly normal unlike a variety of other strange past times such as:
Competitive mooing If you can sound the most like a cow at the Wisconsin State Fair, you can take home $1000, a cow print jacket and a golden cow bell.
Trainspotting All you need is a list of all the numbers of rolling stock on the rail and cross off each one when you spot it.
Extreme Ironing Ironing clothing in different, usually extreme, situations like while rock climbing, surfing, on a kayak.
Guerrilla gardening This consists of working on land that the gardener does not have a legal right to use. It usually takes place on spaces that are abandoned or neglected by their owners.
Competitive dog grooming This is not just a short back and sides, but grooming your dog to look like another animal.
Collecting things such as Air Sick Bags or even Navel fluff.
At GZ you will find a plaque that commemorates an oddball hobby here in Darwin. The cache is x degrees and y meters from this plaque.
To find out x (bearing-degrees) , find the number on the plaque on the line beginning with 'regained', and add a 0 after it.
To find out y (distance - meters) add up the total number of letters in the first 4 words on the second last line on the plaque.