During IFR, what is the importance of continuous monitoring of altimeter settings?

Continuous monitoring of altimeter settings during IFR is crucial for ensuring accurate altitude reporting and preventing Controlled Flight Into Terrain (CFIT). The altimeter is a critical instrument that indicates the aircraft's altitude by measuring atmospheric pressure, which changes with weather conditions and altitude.

When pilots adjust their altimeters to local pressure settings, they ensure that their altitude readings are accurate relative to the terrain and other aircraft in the vicinity. If the altimeter is not set correctly, an aircraft could be higher or lower than indicated, leading to dangerous situations such as flying too close to the ground or colliding with obstacles. This precision in altitude reporting becomes even more paramount in IFR conditions, where visibility is limited, and adherence to assigned altitudes is necessary for safety and compliance with air traffic control instructions.

By routinely monitoring and adjusting the altimeter, pilots can maintain situational awareness and make informed decisions regarding their altitude, enhancing safety and preventing CFIT incidents.