🔍 Key Concepts

• RADAR performance monitoring in real time at sea • Difference between test equipment used alongside (ashore) and devices fitted permanently in the radar signal path • Which components are internal electronic parts vs. external test/verification devices

💭 Think About

• Which option sounds like a portable or dedicated test/check device rather than a built‑in circuit component? • On a training ship, what would the officer use to quickly check whether the whole radar system (transmitter, receiver, display) is working properly without opening the equipment? • Among the choices, which one’s primary purpose is to simulate or return a known signal so you can compare expected vs actual radar performance?

✅ Before You Answer

• Identify which items are individual electronic components inside the radar (not used by the operator directly). • Identify which option is known specifically as a radar test or calibration device. • Ask: Which device would help you verify the transmitted pulse and returned echo to judge overall system health at sea?