Within what frequency band limits do all...

🔍 Key Concepts

• Marine radio beacon purpose and typical use in navigation (older RDF/LOP systems) • The portion of the LF/MF (low and medium frequency) spectrum traditionally allocated to marine radiobeacons • Distinguish between general MF maritime bands (like 300 kHz–3 MHz) and the narrower band assigned just to radiobeacons

💭 Think About

• Which of these options looks like a relatively narrow slice of frequencies specifically reserved for a special-purpose service, rather than a broad communications band? • Think about whether marine radiobeacons need to be within the same band as VHF (very high frequency) or typical MF voice communications, or in a separate LF/MF band optimized for direction-finding. • Which ranges here fall entirely in the LF/MF region normally used for non-voice navigation aids rather than ship-ship voice or weather broadcasts?

✅ Before You Answer

• Verify which answer choice lies fully in the low/medium frequency region below traditional MF voice/DSC frequencies (around 2–3 MHz and up). • Check older navigation texts: marine radiobeacons supporting radio direction finding (RDF) are in a specific, relatively tight band, not spread too wide. • Eliminate any band that clearly extends into frequencies used for other services (like long-range MF communications) rather than fixed navigation beacons.

Within what frequency band limits do all United States marine radio beacon stations operate?

From 280 to 385 kHz

From 162 to 385 kHz

From 285 to 315 kHz

From 300 to 465 kHz

🔍 Key Concepts

💭 Think About

✅ Before You Answer