What is the channel spacing used for VHF marine radio?

The channel spacing used for VHF marine radio is 25 kHz. This spacing allows for sufficient bandwidth to minimize interference between adjacent channels while providing enough clarity and quality for communication purposes. The VHF marine band typically operates in the range of 156 to 162 MHz, and the 25 kHz channel spacing is a standard established for these frequencies to accommodate the number of channels required for effective maritime operations. This spacing is designed to balance the need for more channels with the technical limitations and the need to reduce interference that can occur when the channels are too closely spaced. The choice of 25 kHz enables multiple vessels to communicate without causing overlap and ensures operational efficiency in marine communication systems.