Which frequency is used for pilot broadcasts by all civil airplanes?

Which frequency is used for pilot broadcasts by all civil airplanes?

• A. 121.50 MHz
• B. 126.70 MHz
• C. 118.00 MHz
• D. 123.45 MHz

Answer: (B)

The key idea is that pilots use a common VHF frequency to announce themselves to all other aircraft in the area, especially when there’s no active control tower to coordinate traffic. This universal pilot broadcast channel sits in the VHF voice range used for air-to-air and air-to-ground communications and is designated for traffic awareness among civil airplanes. Broadcasting on this frequency lets nearby pilots hear your position, intentions, and movements, helping everyone stay aware of each other and reduce the risk of collisions. The other frequencies aren’t used for this purpose in the same universal way. The emergency frequency is reserved for distress calls, not routine traffic broadcasts. A lower end of the band is generally allocated for ATC communications or navigation aids rather than broad, aircraft-to-aircraft traffic advisories. And 123.45 is not the standard universal broadcast channel used by all civil airplanes in practice.

The key idea is that pilots use a common VHF frequency to announce themselves to all other aircraft in the area, especially when there’s no active control tower to coordinate traffic. This universal pilot broadcast channel sits in the VHF voice range used for air-to-air and air-to-ground communications and is designated for traffic awareness among civil airplanes. Broadcasting on this frequency lets nearby pilots hear your position, intentions, and movements, helping everyone stay aware of each other and reduce the risk of collisions.

The other frequencies aren’t used for this purpose in the same universal way. The emergency frequency is reserved for distress calls, not routine traffic broadcasts. A lower end of the band is generally allocated for ATC communications or navigation aids rather than broad, aircraft-to-aircraft traffic advisories. And 123.45 is not the standard universal broadcast channel used by all civil airplanes in practice.