What frequency do most ships use for inter-ship communications?

Most ships utilize the VHF (Very High Frequency) frequency band for inter-ship communications because it offers several advantages that make it ideal for maritime communications. VHF is primarily used for line-of-sight communication, which is essential in the maritime environment where vessels often operate within visual distance of each other. The VHF band operates from 30 MHz to 300 MHz, providing a range that is effective for communication over relatively short distances, typically up to about 30 nautical miles.

In addition, VHF radios are relatively straightforward to operate and have channels designated specifically for maritime use, including safety communications, which enhances the safety and coordination among vessels. The use of VHF allows for effective ship-to-ship communication, as well as ship-to-shore communications, making it a critical tool in the management of maritime navigation and safety.

The HF (High Frequency) frequency band is more suitable for long-distance communications but is typically not used for direct vessel-to-vessel communication due to its propagation characteristics, which can lead to interference issues. The MF (Medium Frequency) band is also less commonly used for this type of communication, primarily focusing on communications with shore stations. The UHF (Ultra High Frequency) band is less prevalent in maritime settings for ship