A Marine VHF (Very High Frequency) radio is a vital two-way communication system for sailboats, operating between 156 and 174 MHz for short-range, line-of-sight voice communication. It is used for safety, weather alerts, and communication with other boats or marinas. Key channels include Channel 16 for distress and calling, and DSC (Digital Selective Calling) for automated emergency alerts.

Essential VHF Terminology
Mayday: The highest priority distress call, used only when a vessel or person is in grave or imminent danger (e.g., sinking or fire).

Pan-Pan: An urgent call for situations that are serious but not immediately life-threatening (e.g., lost engine power or a person overboard who is not yet in "grave" danger).

Sécurité: (Pronounced say-cure-it-tay) A safety signal used to broadcast important navigational information, such as weather warnings or the movement of large ships.

Over: Indicates you have finished speaking and are waiting for a response.

Out: Indicates you have finished the conversation and no reply is expected (never say "over and out" as they are opposites).

Roger: Confirms that you have received and understood the last transmission.

Wilco: Short for "will comply"; used to indicate you have received instructions and will carry them out.

Say Again: Used when you need the other party to repeat all or part of their transmission.

VHF radios are more reliable than cell phones on the water and are considered essential safety equipment.