FAA Ground School Practice Test

On what frequency can a pilot receive hazardous in-flight weather advisory service (HIWAS) in the vicinity of Area 1?

1. 123.45 MHz

2. 117.1 MHz

3. 126.7 MHz

4. 124.0 MHz

The correct answer is: 117.1 MHz

HIWAS, or Hazardous In-flight Weather Advisory Service, is an automated service that provides continuous broadcasts of hazardous weather information, specifically for in-flight weather advisories, including significant weather advisories, severe thunderstorm warnings, and more. The frequency of 117.1 MHz is specifically designated as a HIWAS frequency, primarily used by pilots flying in various regions to receive critical weather information that can significantly impact flight safety and decision-making. This service allows pilots to stay informed on hazardous conditions in their flying environment, which can enhance safety. Pilots know to tune into 117.1 MHz for HIWAS broadcasts, ensuring they receive timely information relevant to their flight operations. Other frequencies listed are not associated with HIWAS; they are typically used for different types of communications, such as air-to-air communication or for specific types of air traffic control communications.