Explanation: VHF ship station transmitters must be capable of reducing carrier power to 1 watt. This is a fundamental requirement set forth by regulatory bodies like the FCC (under Part 80 for Marine Services) and international agreements. The 1-watt low power setting is crucial for short-range communications, such as when operating in harbors, marinas, or when communicating with nearby vessels or shore stations. Using this reduced power minimizes the potential for interference to other users on the same or adjacent channels, ensuring efficient and orderly use of the VHF marine band, especially in congested areas. While 25 watts is the typical maximum high-power setting for most VHF marine radios, 10 watts and 50 watts are not the specified low-power requirement for these stations.