[Turbo_Boss]

Ok, I have fix it. The manual say that every time you replace the battery, you need to calibrate the compass.

On section 5.3 of the Vector Manual, it explain how to calibrate it

Here is the PDF manual

http://www.suunto.com/media/suunto/m...ulti_25257.pdf

THX,

Isaac

	Suunto Vector - Click for more info Suunto's original Wristop Computer, the Vector changed the face of sport watches forever with its groundbreaking combination of features, including an altimeter, barometer, electronic compass, digital log book, and watch. Introduced in 1998, the Vector was the first watch to make it to the summit of Mt. Everest. In addition, the Vector won the prestigious European Outdoor Award - Product of the Year in 1999/2000.

	Compass Compasses are sensitive, absolutely crucial instruments to precision navigation. The earth's magnetic field, inclination, and your longitude and latitude all influence the horizontal plane of a compass needle. As a result, compasses are balanced for different geographical zones. Suunto Compasses overcome this limitation to traditional compasses by using a simple 'Two Zone System'. With a Suunto Compass, the only 'balancing zones' are the northern and southern hemispheres. In addition to this innovation, certain Suunto Compasses come equipped with useful features like luminous needles and marks, centimeter/inch scales, magnifying glasses, clinometers, sighting notches, and more.