When do NAVTEX broadcasts typically achieve...

Question 1 of 29218nCHoWHLcMFZAcX7mRzhR

When do NAVTEX broadcasts typically achieve maximum transmitting range?

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Question 1 of 29218

Q

When do NAVTEX broadcasts typically achieve maximum transmitting range?

🔍 Key Concepts

• NAVTEX uses MF (Medium Frequency) radio around 518 kHz • MF radio ground wave vs. skywave (nighttime) propagation • How time of day affects MF range (day vs. night ionospheric absorption)

💭 Think About

• Think about whether MF radio waves travel farther during the day or at night, and why ionospheric absorption changes. • Which time period in the options best matches when skywave propagation is usually strongest for medium frequencies? • Consider how commercial MF radiotelephone ranges compare in daytime vs. nighttime—when do you normally hear distant stations more clearly?

✅ Before You Answer

• Recall that MF daytime is mainly ground wave with shorter range. • Recall that after dark skywave propagation can significantly increase MF range. • Match the time option that best represents the period of full darkness, not just sunrise or sunset.