TONY CRADDOCK / SCIENCE PHOTO LIBRARY TONY CRADDOCK / SCIENCE PHOTO LIBRARY
Nautical instruments. Magnetic compass together with two pairs of compasses (lower left & upper right) on top of a 19th century map of the world. 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. The needle aligns itself with the local lines of magnetic force to indicate the direction of the north and south magnetic poles. The pairs of compasses are used to measure distances on maps.
Model release not required. Property release not required.