Explanation: For vessels required to carry medium-frequency (MF) radiotelephone equipment, specific FCC regulations (Part 80) are in place to ensure reliable communication, especially for safety purposes on the 2182 kHz distress frequency. These regulations mandate a minimum transmitter power level to guarantee a baseline signal strength. The main MF radiotelephone transmitter on such a vessel must be capable of delivering at least **60 watts Peak Envelope Power (PEP)**. Option A suggests 100 watts, which is a common output for HF SSB radios but not the specified minimum for MF. Option C is incorrect because the FCC sets a fixed regulatory minimum power, rather than leaving it to a subjective "predictably needed" power. Option D describes typical specifications for a VHF marine radio (25 watts is the high power setting for VHF), not an MF transmitter.