What is the maximum watt output of a VHF radio?

The maximum watt output of a VHF radio is typically 25 watts. This power level is regulated for marine communications to ensure effective range while minimizing interference with other vessels and services.

At 25 watts, VHF radios can effectively transmit over several nautical miles under normal conditions, which is generally sufficient for marine communication needs in both recreational and commercial contexts. It balances sufficient range with the need to limit transmission power to prevent overcrowding of the radio spectrum, which can occur if radios were allowed to transmit at higher power levels.

The higher wattages mentioned in the options are not standard for VHF marine communication. While there are higher power options in certain communication technologies, VHF radios used for maritime purposes have a maximum limit set at 25 watts to ensure reliable marine safety and communication standards.