🔍 Key Concepts

• MF-HF (Medium/High Frequency) radios and how propagation works over long distances • Why regulations and good practice encourage using the minimum power necessary for effective communication • Typical PEP (Peak Envelope Power) levels for routine ship-to-ship and ship-to-shore voice calls

💭 Think About

• Which power level would be sufficient for most initial calls without causing unnecessary interference to others on the same bands? • How does starting at a lower power and increasing only if needed help manage congestion and prevent interference? • Compare the options: which seem more like high-power/long-range or distress levels, and which look more like normal working-channel power levels?

✅ Before You Answer

• Verify which MF-HF power levels are commonly associated with routine voice communications rather than distress or long-haul operations • Check the guidance about using only as much power as needed for clear communications • Eliminate any options that are clearly excessive for an initial call on a busy MF-HF band (more likely used for long-range or emergency traffic)