🔍 Key Concepts

• Distress and safety frequencies historically used in the MF (medium frequency) band for radiotelephone on older vessels • The traditional international radiotelephone distress frequency that predates GMDSS and DSC systems • Differences between radiotelephone distress frequencies and radiotelegraph/DSC distress frequencies

💭 Think About

• Which of these frequencies have you seen paired with the word ‘Mayday’ and voice (spoken) distress calls in older exam material and manuals? • Look at the numeric values: which one is closest to the classic MF voice distress frequency that was standard worldwide before digital systems became primary? • Can you recall which frequency is associated with voice (radiotelephone) distress, and which are associated with other services or bands?

✅ Before You Answer

• Verify which option lies in the MF band (around a few MHz) and was historically designated as the international radiotelephone distress frequency. • Eliminate any answer choices that are primarily used for other services or bands (for example, long-range HF working channels rather than MF distress). • Double‑check that you are not confusing the radiotelephone distress frequency with radiotelegraph (Morse) distress or modern DSC (Digital Selective Calling) frequencies.