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Question 1 of 20Ff4n0crGiC3WWuEBojlV

Choose the only correct statement about an aircraft’s Automatic Direction Finding (ADF) equipment.

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Question 1 of 20

Ff4n0crGiC3WWuEBojlV

Choose the only correct statement about an aircraft’s Automatic Direction Finding (ADF) equipment.

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🔍 Key Concepts

• ADF (Automatic Direction Finder) uses low/medium frequency radio signals, including NDBs (Non-Directional Beacons) and often standard AM broadcast stations • The way radio waves propagate at low/medium frequencies (ground waves that follow the Earth vs. higher-frequency line-of-sight signals) • The role of loop and sense antennas in resolving bearing and eliminating 180° ambiguity in ADF systems

💭 Think About

• Think about which radio frequencies can serve as NDBs and whether commercial AM broadcast stations fall inside or outside that range—and how pilots actually use ADF in practice. • Consider how low/medium frequency signals travel compared to VHF line-of-sight signals: which type can follow the Earth’s curvature or bend beyond the horizon? • Ask yourself whether an ADF installation normally uses just one antenna, or if it needs more than one type of antenna to correctly determine a unique bearing to the station.

✅ Before You Answer

• Verify the typical frequency range of NDBs and compare it with standard AM broadcast frequencies (around 550–1660 kHz). • Confirm whether ADF systems commonly track AM broadcast stations in addition to dedicated NDBs. • Check if ADF systems usually have both a loop antenna and a sense antenna, and why both might be needed to resolve the bearing unambiguously.

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Question 1 of 20Ff4n0crGiC3WWuEBojlV

Choose the only correct statement about an aircraft’s Automatic Direction Finding (ADF) equipment.

Back

Question 1 of 20

Ff4n0crGiC3WWuEBojlV

Choose the only correct statement about an aircraft’s Automatic Direction Finding (ADF) equipment.

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?

Quick actions

— No credit card needed