When may you test a radiotelephone transmitter on the air?
• Radiotelephone operating procedures in the marine VHF band • Purpose and content of test transmissions (identification, brevity, avoiding interference) • Special listening or silent periods for safety/distress traffic
• In normal day‑to‑day operation, how do mariners make sure their radio is working before they really need it for distress or safety traffic? • Would a rule about testing be very restrictive (rarely allowed) or practical (recognizing that equipment must be checked regularly)? • How do silent periods and distress watchkeeping affect when you should and should not key the microphone just to test your set?
• Check which option best matches standard guidance that tests should be brief, clearly identified as tests, and not interfere with other traffic. • Verify which choices try to limit testing by time of day or power level and ask whether those limits appear in typical marine radio rules. • Confirm that the correct choice accounts for silent periods when routine transmissions, including tests, must be avoided.
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