Suunto Clinometer PM-5/360PC /Kompas Tandem

Features : * including Lanyard & skylon case calibrated for an accuracy * framework is of corrosive resistant light-weight aluminium * scale card is supported by a jewel bearing assembly * all moving parts are immersed in a damping liquid inside a high strength hermetically sealed plastic container * weight: 4.2 oz * size: 2.75" x 2" x 0.625" * optical scale graduated in degrees from 0� to +/-90� and from 0% to +/-150% * table of cosines imprinted on back of instrument * can be read directly to one degree or one percent * can be estimate to 10 minutes or 1/5 of 1 per cent (applying to readings around the zero level)