What is the recording interval of the Cockpit Voice Recorder (CVR)?

• A. 15 minute loop
• B. 30 minute loop
• C. 60 minute loop
• D. 90 minute loop

Answer: (B)

Cockpit Voice Recorders are built to record continuously but store only a fixed amount of history. Once their memory fills, the oldest audio is overwritten by new data, so you always have the most recent portion of flight cockpit audio available. The typical loop length for most CVRs is 30 minutes, meaning the last half hour of cockpit sound is preserved for analysis. This design balances the need to capture recent events with the practical limits of storage. While some configurations can extend the window, 30 minutes is the standard expectation in many training and test scenarios.