What barometric pressure should be set on the altimeter during cruise flight in the standard pressure region?

During cruise flight in the standard pressure region, the altimeter should be set to a barometric pressure of 29.92 inches of mercury (inHg). This setting is based on the standard atmosphere model, which defines 29.92 inHg as the standard sea-level pressure.

Using this standard pressure ensures that pilots can maintain altitude accurately and consistently across different regions and altimeters. The use of 29.92 inHg allows for a common reference point for all aircraft flying in the same airspace, contributing to safety and effective traffic management.

Setting the altimeter to this value in the standard pressure region is critical because it provides a consistent baseline for altitude measurement. Deviating from this standard could result in altitude discrepancies, increasing the risk of altitude loss or collisions with other aircraft. Understanding the use of this standard pressure setting is an essential concept for private pilots, ensuring they can navigate effectively and maintain safe flight operations.