TONY CRADDOCK / SCIENCE PHOTO LIBRARY TONY CRADDOCK / SCIENCE PHOTO LIBRARY
Magnetic compass. Magnetic compass being used with an ordnance survey map. A compass consists of a thin, free swinging magnetised needle that points to a dial. The dial is graduated in degrees and shows the cardinal points, north, south, east and west (only north seen here). The needle aligns itself with the local lines of magnetic force to indicate the direction of the north and south magnetic poles.
Model release not required. Property release not required.