When you go to the store for a compass, check them against each other, and hold them away from the metal racks,etc. I've seen 4-5 of the same point in different directions. Sometimes the ones WITHOUT liqiud damping seem to be more accurate. I've even drilled a small hole in one to let the liqiud out. You have to wait half a minute for it to settle, but the needle swings freely. This is key to all compasses . Most of the button compasses I've seen were really sticky. I settled on a Suunto ( the one with the thermometer)