Which radio frequency is most commonly used for marine distress communications?

The frequency most commonly used for marine distress communications is 156.800 MHz. This frequency is designated as the internationally recognized distress frequency for all ships and stations operating within the Global Maritime Distress and Safety System (GMDSS). It is specifically used for emitting distress signals and emergency broadcasts, allowing vessels in peril to communicate their needs effectively and quickly to other ships and rescue services.

When a vessel issues a distress call on this frequency, it ensures that nearby vessels, as well as coast stations, are tuned in to receive the message and can provide assistance or alert the relevant authorities. The significance of this frequency in maritime safety cannot be overstated, as it serves as the lifeline for vessels facing emergencies at sea.

In contrast, the other frequencies listed are utilized for different maritime communication purposes, such as ship-to-ship communications or routine communications rather than emergency situations. Thus, they do not fulfill the specific function of distress communications as efficiently or universally as 156.800 MHz.