Discussion
A voice recorder retains 2 hours on a loop. Material recorded 2 hours and 10 minutes before power removal is
Answer: A
Correct answer: Already overwritten
A two-hour loop holds the most recent two hours and nothing before it, so material from two hours and ten minutes back has been written over by the ten minutes that followed.
This is exactly why the circuit breaker is pulled promptly after a serious incident: every minute the recorder keeps running destroys a minute of what may be the relevant evidence. The data recorder holds parameters rather than audio, so it cannot supply what the voice recorder has lost.
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