Which unit is commonly used to report atmospheric pressure in aviation?

In aviation, atmospheric pressure can be reported using various units, and each of these units is commonly encountered in different contexts. Pascals are the standard unit of pressure in the International System of Units (SI), but in aviation meteorology and practice, there are more commonly used units. Millibars are widely utilized in meteorological reports and can also be found in aviation settings, especially in relation to altimeter settings. Inches of mercury is another traditional unit that is often used in aviation for altimeter settings, particularly in the United States.

The broad acceptance of these measurements underlines the importance of understanding and communicating atmospheric pressure in multiple units, which is crucial for safe navigation and operational planning in aviation. Therefore, referring to all three units as applicable demonstrates a comprehensive approach to reporting atmospheric pressure across different aviation contexts.