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FCC Commercial Radio study materials
FCC Commercial Radio study resources

FCC Commercial Radio: Radio Law, Rules, and Operating Practices

FCC Commercial Radio · Work through your exam, one topic at a time.

All guide sections

Radio Law, Rules, and Operating Practices

This domain tests the FCC regulatory framework that governs commercial radio operators, mainly 47 CFR Parts 13 and 80. Expect questions on licensing, station identification, distress and safety communications, logkeeping, and enforcement.

Licensing and authority

  • The FCC issues commercial operator licenses: Marine Radio Operator Permit (MROP), General Radiotelephone Operator License (GROL), GMDSS Radio Operator's License, and Ship Radar Endorsement. Licenses are valid for the holder's lifetime unless revoked or suspended; there is no routine renewal cycle.
  • The MROP is the usual credential for operating a ship radiotelephone station; the GROL is required for certain coast and land stations and for transmitter maintenance. A Ship Radar Endorsement is needed to service radar.
  • Keep the operator license available for inspection; the station license is kept at the station. They are separate documents.

Distress and safety

  • VHF Channel 16 (156.800 MHz) is the international distress, safety, and calling channel. Channel 70 (156.525 MHz) is reserved for digital selective calling (DSC) and must not carry voice.
  • MF 2182 kHz and the HF distress frequencies (4125, 6215, 8291, 12290, and 16420 kHz) carry distress and safety traffic. Radiotelephone silence periods apply on 2182 kHz during the first three minutes of each half hour.
  • MAYDAY signals grave and imminent danger; PAN-PAN signals urgency; SECURITE signals a safety message. Distress traffic has absolute priority over all other communications.
  • False distress calls are prohibited and can bring heavy fines and imprisonment.

Operating practice

  • Identify with the call sign at the start and end of a contact and at intervals. Use only authorized frequencies and the minimum power needed.
  • Do not transmit superfluous signals, profanity, or unidentified traffic. In an emergency, any frequency may be used to obtain assistance.
  • Record distress, urgency, and safety traffic in the station log, including time, frequency, stations involved, and the nature of the emergency.

Worked example

Your vessel sees a nearby boat on fire. You are the only station in range. What do you do? Reasoning: The situation is grave and imminent, so send a MAYDAY on VHF Channel 16, giving the vessel name, call sign, position, nature of emergency, and assistance needed. If DSC-equipped and time permits, send a DSC distress alert on Channel 70 first, then the voice call on 16. Keep 16 clear for the response, acknowledge any reply, and log the time, frequency, and details. The emergency justifies using Channel 16 even though it is primarily a calling channel.

Traps

  • Sending voice on Channel 70, which is DSC-only.
  • Assuming the operator license expires and must be renewed on a fixed schedule.
  • Treating MAYDAY and PAN-PAN as interchangeable.
  • Forgetting that the station license and the operator license are separate requirements.