What are three acceptable sources for obtaining the local altimeter setting?

The correct answer identifies three reliable sources for obtaining the local altimeter setting, which is crucial for safe flight operations.

The Automatic Terminal Information Service (ATIS) provides real-time weather conditions, including the current altimeter setting, which is vital for pilots to ensure accurate altitude readings during takeoff and landing. METARs are standardized aviation weather reports that also include altimeter settings, ensuring pilots receive up-to-date and relevant atmospheric data necessary for flight safety.

The resource known as 1-800-WX-BRIEF provides comprehensive weather briefings, including altimeter settings and other critical flight information. This service is particularly beneficial as it compiles and disseminates official weather data and updates sourced from meteorological services, further supporting safe navigation.

In contrast, other options mention sources or elements that are either not directly related to providing altimeter settings or lack the necessary credibility. For pilots, having accurate and verified information is paramount, and the sources chosen in the correct answer exemplify this reliability.