Today, in the U.S., cockpit voice recorders (CVR) used on commercial aircraft are only required to capture and store two hours of audio information. After two hours, the most recent information is lost when the CVR, due its limited storage capacity, records over the previous cockpit conversations.

The Modular Open Systems Approach directive has accelerated the adoption of a variety of Modular Open Systems Approach supporting standards, including SOSA, CMOSS, FACE, VICTORY, and GVA, by the Army, Air Force, and Navy.

One of the main benefits of Modular Open Systems Approach is leveraging common standards to ensure interoperability between sensors and systems.

Commercial airlines often use two types of flight recorders – a flight data recorder (FDR) and a cockpit voice recorder (CVR) – for different functionality.