Which radio band is primarily used for ship-to-ship communications?

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Multiple Choice

Which radio band is primarily used for ship-to-ship communications?

Explanation:
Ship-to-ship communications rely on line-of-sight radio links, so the best band is the VHF range around 156–162 MHz. This band provides reliable, clear voice communications between nearby vessels with practical antennas and equipment, and it uses standardized channels for calling and safety, such as the channel used for distress and calling and another for DSC. While HF can reach farther by relying on ionospheric reflection, it’s less predictable and requires more power and larger antennas; UHF is usable but not the standard maritime choice for routine ship-to-ship traffic; VLF is meant for long-range, including submarine communications, and isn’t suitable for everyday ship-to-ship voice. Therefore VHF is the primary band used for ship-to-ship communications.

Ship-to-ship communications rely on line-of-sight radio links, so the best band is the VHF range around 156–162 MHz. This band provides reliable, clear voice communications between nearby vessels with practical antennas and equipment, and it uses standardized channels for calling and safety, such as the channel used for distress and calling and another for DSC. While HF can reach farther by relying on ionospheric reflection, it’s less predictable and requires more power and larger antennas; UHF is usable but not the standard maritime choice for routine ship-to-ship traffic; VLF is meant for long-range, including submarine communications, and isn’t suitable for everyday ship-to-ship voice. Therefore VHF is the primary band used for ship-to-ship communications.

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