The clue is in the name

The cache is not at the above cordinates.
This cache might need a little local research to find its location.
It's been sited on open moor -  so please go prepared!.
This cache has been placed with the kind permission of the Dartmoor National Park Authority in accordance with the new geocaching guidelines.
http://www.dartmoor-npa.gov.uk/visiting/vi-enjoyingdartmoor/geocaching