Civil Services Prep

Prelims 2026 · Science and Technology · Question 44

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 :

  1. 1 only
  2. 2 and 3 only
  3. 1 and 2 only
  4. 1, 2 and 3

Answer

2 and 3 only

1 is incorrect because the underwater locator beacon emits acoustic/ultrasonic pings, not red light pulses. 2 is correct because the aircraft 'black box' system covers both cockpit voice recording and flight data recording. 3 is correct because the crash-survivable memory unit may be housed in stainless steel or titanium.

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