1) Beside each machine in the list there is a tiny box to tick. If you have seen a machine, tick the box.
2) Fill in the location, date and your details on the input boxes to the left.
3) The date has to be in the YYYY-MM-DD format. So if you see something on December 25th, 2008, enter 2008-12-25.
4) Click "submit sightings" and you're done!