Ham Radio Extra Class Practice Test

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Prepare for the Ham Radio Extra Class Test with flashcards and multiple choice questions. Each question includes explanations to enhance your learning and confidence. Ensure your success on exam day!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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What technology is used to track, in real time, balloons carrying amateur radio transmitters?

Radar
Bandwidth compressed LORAN
APRS
Doppler shift of beacon signals

The correct answer is: APRS

The correct choice is based on the functionality of Automatic Packet Reporting System (APRS), which is a digital communications protocol used by amateur radio operators. APRS allows for the real-time tracking of objects, including balloons equipped with amateur radio transmitters, through the use of GPS data. When a balloon carrying an amateur radio transmitter is equipped with an APRS-enabled device, it continuously broadcasts its location data, which is picked up by receivers operated by other amateur radio operators. This data can be visualized on maps or software applications that support APRS, thereby providing real-time tracking information. This technology is particularly effective for tracking moving objects due to its ability to update position data frequently. Additionally, APRS can integrate weather telemetry and other data, making it a versatile tool for ballooning activities and other applications in amateur radio. Other tracking methods mentioned, such as radar or Doppler shift, are less suited for real-time tracking of balloons due to limitations in their format or requirements for ground infrastructure.