Which VHF radio call is used for safety signals?

The correct choice for safety signals in VHF radio communication is "Securite." This term is specifically used to convey important navigational or safety-related information to all vessels in the area, such as alerts about hazards, weather changes, and other critical announcements that may affect safety on the water.

"Securite" alerts mariners to take heed of the information being announced, emphasizing that it is important to listen carefully. This communication is crucial for maintaining safety at sea, especially in crowded or challenging environments.

The other terms, while related to safety, serve different specific purposes. "Mayday" is reserved for life-threatening emergencies requiring immediate assistance, signaling that a vessel or individual is in imminent danger. "Pan-pan" indicates a situation that is urgent but not life-threatening, suggesting that assistance is needed soon but there is no immediate danger to life. "Attention" is not an official call recognized in VHF communications for safety signals; it does not have a standardized meaning in the context of maritime safety.

Understanding these distinctions helps mariners communicate effectively and ensures that critical information related to safety is propagated accurately on the water.