A ship has been communicating effectively on...

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Question 1 of 20E8tu9MDjgrSAhgmOQE9q

A ship has been communicating effectively on 16 MHz during daylight hours with a shore station at a distance of 3200 miles. Toward late afternoon and evening what effect would be noticed?

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Question 1 of 20

E8tu9MDjgrSAhgmOQE9q

A ship has been communicating effectively on 16 MHz during daylight hours with a shore station at a distance of 3200 miles. Toward late afternoon and evening what effect would be noticed?

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🔍 Key Concepts

• Ionospheric skywave propagation for HF frequencies around 16 MHz • Differences between daytime and nighttime ionosphere (D-layer absorption vs. F-layer reflection) • How maximum usable frequency (MUF) changes from day to night for long‑range (thousands of miles) communication

💭 Think About

• Think about whether higher HF frequencies (like 16 MHz) work better in strong solar/ionospheric conditions (daytime) or weaker conditions (nighttime). • Ask yourself: for a 3200‑mile path, is 16 MHz closer to a daytime band or a nighttime band for long‑range marine communications? • Consider what usually has to be done with working frequency (go higher or lower) as evening comes on long‑distance HF circuits.

✅ Before You Answer

• Identify whether 16 MHz is typically listed/used as a daylight or nighttime long‑range HF band in marine radio tables. • Check how MUF generally moves lower at night, and what that does to the usefulness of a relatively high HF frequency like 16 MHz over a 3200‑mile path. • Verify whether typical practice in the evening is to shift to a lower HF band (e.g., 8 or 12 MHz) or to a higher one for better range.

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Question 1 of 20E8tu9MDjgrSAhgmOQE9q

A ship has been communicating effectively on 16 MHz during daylight hours with a shore station at a distance of 3200 miles. Toward late afternoon and evening what effect would be noticed?

Back

Question 1 of 20

E8tu9MDjgrSAhgmOQE9q

A ship has been communicating effectively on 16 MHz during daylight hours with a shore station at a distance of 3200 miles. Toward late afternoon and evening what effect would be noticed?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

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