What is the minimum transmitter power level required by the FCC for a medium-frequency transmitter aboard a compulsorily fitted vessel?

What is the minimum transmitter power level required by the FCC for a medium-frequency transmitter aboard a compulsorily fitted vessel?

• A. 10 watts PEP
• B. 100 watts PEP
• C. 500 watts PEP
• D. At least 60 watts PEP

Answer: (D)

Minimum transmitter power for a medium-frequency transmitter on a compulsorily fitted vessel is 60 watts peak envelope power (PEP) or more. This level ensures that distress and safety communications can be received reliably over the required distances on the MF band, even with variable sea conditions and propagation. PEP is used because it reflects the actual power during the peak of the signal, which is important for non-continuous modes like SSB. Therefore, the minimum acceptable level is "at least 60 watts PEP." Higher power is permissible, but 60 watts is the required floor.

Minimum transmitter power for a medium-frequency transmitter on a compulsorily fitted vessel is 60 watts peak envelope power (PEP) or more. This level ensures that distress and safety communications can be received reliably over the required distances on the MF band, even with variable sea conditions and propagation. PEP is used because it reflects the actual power during the peak of the signal, which is important for non-continuous modes like SSB. Therefore, the minimum acceptable level is "at least 60 watts PEP." Higher power is permissible, but 60 watts is the required floor.