E-38
• Accurate direction readings are impossible while in a train, boat, air plane,
etc.
• Accurate readings are also impossible indoors, especially inside ferro-
concrete structures. This is because the metal framework of such structures
picks up magnetism from appliances, etc.
Storage
• The precision of the bearing sensor may deteriorate if the watch becomes
magnetized. Because of this, you should be sure to store the watch away
from magnets or any other sources of strong magnetism, including:
permanent magnets (magnetic necklaces, etc.) and household appliances
(TVs, personal computers, washing machines, freezers, etc.)
• Whenever you suspect that the watch may have become magnetized,
perform one of the calibration procedures under “Calibrating the Bearing
Sensor” (page E-39).
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