Confirmation of acceptance and understanding of the visual signal by the airplane pilot, transmitted from the accident area at night is

1. Green rocket launch
2. Evidence of dropping message
3. ✓Switching on and off the landing or navigation lights for some timesCorrect answer
4. Banking the airplane to sides for some times

Explanation

According to ICAO Annex 12, Appendix A, the visual signal from an aircraft to survivors on the ground indicating that their ground signal has been understood…

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