What is the distance between range markers...

🔍 Key Concepts

• Relationship between oscillator frequency (kHz) and distance between range markers (NM) on the radar or LORAN-like display • How period of a signal (time for one cycle)** is related to its frequency** • Typical scale factors used in exam questions: when frequency doubles or halves, what happens to marker spacing?

💭 Think About

• First, recall or derive the basic formula that links frequency and time period; then think about how that time period translates into a distance on the screen using the speed of propagation. • Ask yourself: if the oscillator frequency is increased, do the range markers get closer together or farther apart? • Try to remember a ‘reference’ pair (e.g., a common exam value of kHz and the corresponding NM spacing) and scale up or down from that using proportional reasoning.

✅ Before You Answer

• Make sure you are using the correct proportional relationship: range-marker spacing is inversely proportional to oscillator frequency. • Check that you are thinking in nautical miles, not yards or statute miles. • Before choosing, eliminate any options that would imply that higher frequency produces larger spacing, since that would contradict the inverse relationship.

What is the distance between range markers if the controlling oscillator is operating at 20 kHz?

1 nautical miles.

2 nautical miles.

4 nautical miles.

8 nautical miles.

🔍 Key Concepts

💭 Think About

✅ Before You Answer