🔍 Key Concepts

• Standard marine radiotelephone distance signals in the relevant code (e.g., 'D' vs 'R') • How nautical miles are expressed in that code • Difference between a signal that includes a unit (like miles) and one that may indicate a radius or range

💭 Think About

• Ask yourself: In the signaling code, which letter normally indicates distance in nautical miles specifically, rather than other kinds of ranges or radii? • Consider whether the presence or absence of an ending letter (like N) changes the meaning from just a number to a number with a specific unit. • Compare each choice and decide: which format most closely matches the standard pattern for expressing distance in nautical miles in coded messages?

✅ Before You Answer

• Verify in the codebook what 'D' stands for in distance-related groups. • Verify in the codebook what 'R' stands for and whether it indicates something different from straight-line distance. • Check if the suffix 'N' is required when expressing nautical miles, or if it has another meaning.