The cache is a container with a 35mm film canister containing the log.
Parking is available at Belstone, and the cache can be found after walking up from the moor gate past the Watchet Hill flagpole.
It isn't located on any military range.
This cache complies with the DNPA agreement for geocaching - http://www.dartmoor-npa.gov.uk/visiting/vi-enjoyingdartmoor/geocaching