What are the two main types of signaling used for emergencies on ships?

• A. Radio communications (VHF mayday).
• B. Sound signals only.
• C. Visual signals (flags/flares) and radio communications (VHF mayday).
• D. Morse code messages.

Answer: (C)

Emergency signaling on ships relies on two ways to reach people: visual signals and radio communications. Visual signaling uses flags, pennants, day shapes, and distress flares so nearby vessels can see that you’re in trouble even if there’s no radio contact. Radio communications let you broadcast a distress call over the water, typically with a mayday on VHF channel 16 and DSC for automated alerts, reaching vessels and rescue coordination centers at a distance. Relying only on sound signals or Morse code isn’t as effective for emergency response, because they either depend on close proximity or aren’t the standard modern means of getting quick, coordinated help. So the combination of visible signals and radio distress signaling is the most reliable approach.