Which items are included in the core ADS-B Out knowledge for customers, given the system's commonality with the transponder?

• A. Understanding any impact disabling the transponder could have on ADS-B, or vice versa
• B. What to do when ADS-B is inoperative, which is the same process as when the transponder is inoperative
• C. Being able to determine failure indicators within the system
• D. 1 and 3 only

Answer: (D)

ADS-B Out knowledge for customers hinges on how the system shares components and behavior with the transponder. You need to understand how disabling the transponder could affect ADS-B, or how ADS-B issues could impact the transponder, because the two systems are interconnected and interdependent in flight operations and compliance checks. Being able to determine failure indicators within the system is essential, as it helps pinpoint whether a fault lies with ADS-B, the transponder, or their interconnection, enabling proper troubleshooting and maintenance. The idea that ADS-B inoperative procedures are the same as transponder inoperative procedures isn’t correct, since each system has its own specific troubleshooting and shutdown processes. Therefore, the items that reflect the interaction and the ability to diagnose failures are the ones included.