What should a pilot do when descending from the Standard Pressure Region into the Altimeter Setting Region?

When a pilot is descending from the Standard Pressure Region (which is typically at or above 18,000 feet in the United States) into the Altimeter Setting Region (where local altimeter settings are used), it is essential to obtain the current altimeter setting from the nearest station. This ensures that the altimeter reflects the current atmospheric pressure at sea level, allowing for safe and accurate altitude measurements.

As a pilot descends, atmospheric pressure can change significantly, and it is crucial to have the most up-to-date local altimeter setting to avoid miscalculating altitude, which could potentially lead to altitude-related incidents. This adjustment is vital for maintaining situational awareness and complying with safety regulations, ensuring that the aircraft operates safely within controlled airspace and provides reliable vertical navigation.

Utilizing the local altimeter setting helps maintain the aircraft's altitude based on ground conditions, thus ensuring that the pilot can accurately gauge their height above the terrain or other navigational references. By acquiring the correct setting, the pilot can proceed safely through the transition from the Standard Pressure Region to the Altimeter Setting Region.