Which of the following statements with regard to Black Boxes used in modern aircrafts is/are correct ? 1. They carry a beacon emitting red light pulses to facilitate underwater detection. 2. They record both the cockpit voice and flight data. 3. Their memory units are made using either stainless steel or titanium. Select the answer using the code given below :
A
1 only
B
2 and 3 only
Correct answer
C
1 and 2 only
D
1, 2 and 3
Explanation
The 'black boxes', the cockpit voice recorder and the flight data recorder, are painted bright orange and record cockpit audio and flight parameters. Their crash-survivable memory units are encased in stainless steel or titanium. They carry an underwater locator beacon that emits ultrasonic acoustic pings (about 37.5 kHz), not red light pulses, so statement 1 is wrong.
Science & TechnologyAviation: flight data recordersBlack boxFlight data recorderCockpit voice recorderUnderwater locator beaconCrash-survivable memory