In what format is the altimeter's baro-set data presented?

The altimeter's baro-set data is presented in millibars and inches of mercury. This format is standard in aviation as it provides a clear and universally understood method to communicate barometric pressure settings that are critical for accurate altitude readings during flight.

Millibars are a unit of pressure commonly used in meteorology, and inches of mercury (inHg) are widely used in aviation, particularly in the United States. The dual format ensures that pilots can interpret and utilize the data effectively, aligning with the altimeter settings required for safe altitude navigation.

Using this combined measurement format allows pilots to quickly set their altimeters according to the local barometric pressure, ensuring accurate altitude readings and improving safety in flight operations.