🔍 Key Concepts

• GMDSS distress procedures for radiotelephone or DSC (Digital Selective Calling) • The purpose of repeating a MAYDAY when no acknowledgment is received • Historic use of silent periods on distress and calling frequencies (e.g., 2182 kHz)

💭 Think About

• Think about why you would need to repeat a distress message if nobody answers the first time. What is the goal of repeating it? • Consider whether regulations normally require a fixed time interval (like 3, 5, or 15 minutes), or whether they focus more on getting a response and using the frequency efficiently. • Ask yourself how "silent periods" relate to distress traffic: when are they, and why might they be important for repeating a call?

✅ Before You Answer

• Verify whether the rule is based on fixed time intervals versus continuing until acknowledgment. • Check how silent periods are described in traditional voice distress procedures and whether they are the only time you may repeat, or just a recommended/especially effective time. • Confirm that the correct choice matches the idea that the main objective is to obtain an answer to the distress while minimizing interference with other traffic.