Practice question

What distinctive light characteristic is emitted by an Isolated Danger Mark (Marca de Peligro Aislado) at night?

  1. Continuous very quick white light (VQ W)
  2. Fixed unbroken red light
  3. White flashing light showing a group of two flashes: Fl(2) W
  4. Alternating red and green flashes every 3 seconds

Answer: C — White flashing light showing a group of two flashes: Fl(2) W

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