Suunto MB-6 Mirror Sighting Field Compass, Southern Hemisphere (MB6)

Suunto Match Box Compass

The Suunto MB-6 is a combination of a hand bearing and base plate compass in a highly resistant Noryl matchbox style case and is ideal for marine use. Though small and compact, the MB-6 boasts a host of invaluable features.

Suunto MB-6 Specifications

• Balanced for the northern or southern hemisphere
• Sighting compass with mirror
• Matchbox style
• Highly resistant case
• Jewel bearing
• Adjustable declination correction scale
• Easy-to-read luminous markings help to use the compass in dark conditions
• Clinometer
• Comes with lanyard
• Size: 67 x 45 x 22 mm (with lid closed)
• Weight: 55 g

Field compasses in general

Mechanical compasses have been used for navigation for thousands of years.

Still today magnetic compasses are environmentally friendly, economical and the most reliable tool when choosing the course. The oldest Suunto field compasses, which are still in use, were manufactured in 1938. A high quality field compass hardly needs any other service than washing in fresh water from time to time. The compass works without any external power supply. The compass gets its power from nature – from the magnetic poles.

COMPASS BALANCING 

Two Geographical Balancing Zones

The vertical intensity and direction of the earth's magnetic field, the inclination, influences the horizontal plane of a compass needle according to the latitude where it is used. Due to inclination, compasses must be balanced for different geographical zones in order to keep the needle in a horizontal position.

Previously, the globe was divided into five different balance zones in which specific compasses functioned. However, as people travel more and more, the need for a compass with a greater geographical range has increased. Thanks to Suunto's 'Two Zone System' there are only two balance zones to consider in compass use - the northern hemisphere and the southern hemisphere. In practice, this means that a Suunto compass designed for the northern hemisphere will still work for a fair distance into the southern hemisphere, and vice-versa.