Suunto KB-20 is a floating hand-bearing compass that weights only 40 g. It is an ideal instrument for marine, professional and outdoor use. The Suunto KB-20 has an accuracy of 1 degree, the graduation interval is 1° and it has reverse scale. The capsule is covered with a floating, shock-resistant plastic housing. The cards of these compasses are immersed in a special dampening fluid that ensures vibration-less, smooth behavior. The compass card is set on an anti-magnetic pivot with jewel-bearing. The sintered special magnet guarantees long life-time for accuracy and smooth behavior. The liquid remains clear and maintains its viscosity low even in high temperature variations for years. The compasses have been given permanent anti-static treatment. The lens apertures of the Suunto KB-14 and KB-20 types are restricted horizontally by a column, which automatically centers the eye on the optical axis, thus eliminating parallax.