For reading of topographical and tourist maps and determination of azimuthal location of a given place. Suitable for overhead projector.
Transparent design. Diameter 50mm with black and red magnetised needle. Mounted on a transparent plastic base with 0-6cm x 1mm scale on bevelled end of the base plate. Full circle divided into 360° with N,S,E and W directions indicated. Graduated every 5° and labelled in 60° increments. The needle housing is liquid filled to damp oscillations in just 5 seconds. The red tip indicates north. Meridian lines help in accurate plotting of angles.
Adjustable wrist strap.