When is a Mode C transponder required?

When is a Mode C transponder required?

• A. When flying below 10,000' MSL
• B. In Class D airspace only
• C. In Class A, B, or C airspace, and over 10,000' MSL
• D. Only during night flights

Answer: (C)

A Mode C transponder is mandated in specific airspace scenarios to ensure safety and improve situational awareness by allowing air traffic control to track aircraft. The requirement states that a Mode C transponder must be used in Class A, B, and C airspace, as well as above 10,000 feet mean sea level (MSL). In Class A airspace, which is generally above 18,000 feet MSL, transponder usage helps prevent collisions and manage the high-density traffic typical of this flight level. Class B airspace surrounds major airports and is designed to maintain safe distances between aircraft, necessitating transponder use for both communication and tracking with air traffic control. Class C airspace also involves moderate traffic levels, requiring a Mode C transponder to enhance surveillance and management capabilities. Additionally, the requirement applies to flights above 10,000 feet MSL to further support situational awareness in busier vertical airspace. By having this technology in place, it allows for better traffic management and enhances safety throughout these levels. Other options may refer to specific airspace or conditions but do not cover the full breadth of regulations for where a Mode C transponder is necessary. For instance, flying below 10,000 feet MSL doesn't

A Mode C transponder is mandated in specific airspace scenarios to ensure safety and improve situational awareness by allowing air traffic control to track aircraft. The requirement states that a Mode C transponder must be used in Class A, B, and C airspace, as well as above 10,000 feet mean sea level (MSL).

In Class A airspace, which is generally above 18,000 feet MSL, transponder usage helps prevent collisions and manage the high-density traffic typical of this flight level. Class B airspace surrounds major airports and is designed to maintain safe distances between aircraft, necessitating transponder use for both communication and tracking with air traffic control. Class C airspace also involves moderate traffic levels, requiring a Mode C transponder to enhance surveillance and management capabilities.

Additionally, the requirement applies to flights above 10,000 feet MSL to further support situational awareness in busier vertical airspace. By having this technology in place, it allows for better traffic management and enhances safety throughout these levels.

Other options may refer to specific airspace or conditions but do not cover the full breadth of regulations for where a Mode C transponder is necessary. For instance, flying below 10,000 feet MSL doesn't