Altimeter
The watch’s altimeter uses a pressure sensor to detect current air pressure, which is then used to estimate the current altitude based on ISA (International Standard Atmosphere) preset values. You can specify a reference altitude, which the watch will use to calculate your current altitude based on the value you specify. Altimeter functions also include storage of measurement readings in memory.
Important!
•This watch estimates altitude based on air pressure. This means that altitude readings for the same location may vary if air pressure changes.
•The semiconductor pressure sensor used by the watch for altitude readings also is affected by temperature. When taking altitude readings, make sure the watch is not subjected to temperature changes.
•To avoid the effect of sudden temperature changes during readings, keep the watch on your wrist in direct contact with your skin.