G-Shock GW-9200BPJ-1 - Manual (Page 68)

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About Barometric and Temperature Measurement
• Barometric pressure and temperature measurement readings are taken as
soon as you enter the Barometer/Thermometer Mode. After that, barometric
pressure and temperature readings are taken every five seconds.
• During barometric pressure measurements, the watch may not be able to
update its timekeeping display contents normally. Correct timekeeping is
maintained internally, however.