When flying at FL 130, when should the altimeter be set to 29.92?

When flying at FL 130, when should the altimeter be set to 29.92?

• A. After reaching FL 130
• B. Prior to reaching FL 130
• C. At FL 150
• D. When descending to FL 130

Answer: (B)

Setting the altimeter to 29.92 inches of mercury is required when flying at or above the transition altitude, which is the altitude where aircraft switch from using local altimeter settings to a standard pressure setting. In many regions, including North America, this transition altitude is typically around 18,000 feet, but it can vary by country. When flying at FL 130 (which is 13,000 feet), you should set the altimeter to the standard pressure of 29.92 inches before reaching FL 130. This ensures that altitude readings are consistent with the standard atmospheric pressure, allowing for safe separation of aircraft flying at those altitudes. If a pilot waits until after reaching FL 130 to make the switch, it could lead to discrepancies in altitude reporting, which can affect separation from other aircraft and ultimately safety. Setting the altimeter prior to reaching FL 130 ensures compliance with regulations and contributes to safe navigation in controlled airspace.

Setting the altimeter to 29.92 inches of mercury is required when flying at or above the transition altitude, which is the altitude where aircraft switch from using local altimeter settings to a standard pressure setting. In many regions, including North America, this transition altitude is typically around 18,000 feet, but it can vary by country.

When flying at FL 130 (which is 13,000 feet), you should set the altimeter to the standard pressure of 29.92 inches before reaching FL 130. This ensures that altitude readings are consistent with the standard atmospheric pressure, allowing for safe separation of aircraft flying at those altitudes.

If a pilot waits until after reaching FL 130 to make the switch, it could lead to discrepancies in altitude reporting, which can affect separation from other aircraft and ultimately safety. Setting the altimeter prior to reaching FL 130 ensures compliance with regulations and contributes to safe navigation in controlled airspace.