Each time (A) is held down for about one second, the barometric pressure change indicator will toggle between enabled and disabled. While the barometric pressure change indicator is enabled, the watch will beep to alert you whenever it detects a significant change in air pressure readings (due to sudden altitude change, or to the passage of a high or low pressure area).

• While the barometric pressure change indicator is enabled, the [BARO] indicator is displayed along with one of the indicators below.

This indicator:	Means this:
	Sudden drop in pressure
	Sudden rise in pressure
	Sustained rise in pressure, shifting to a fall
	Sustained fall in pressure, shifting to a rise