What should the co-pilot verify regarding altimeter settings during approaches?

The co-pilot should verify that altimeter settings are accurate and consistent during all phases of flight, including approaches. This is crucial because maintaining the correct altimeter setting affects altitude accuracy and can significantly impact situational awareness and safety. During approaches, especially in changing weather conditions or when transitioning between different altimeter settings, ensuring precision in altimeter readings prevents altitude miscalculations that can lead to unsafe flying conditions, such as inadvertently flying too high or too low in relation to the terrain or runway. Therefore, consistent verification of altimeter settings is a critical responsibility of the co-pilot to ensure a safe and effective approach to landing.