When the GMDSS Radio Operator on watch hears "Securite" spoken three times, what type of information can he expect to receive?

When "Securite" is spoken three times over the radio, it indicates that a message concerning the safety of navigation is about to be transmitted. This is part of the recognized standard communication procedures in the Global Maritime Distress and Safety System (GMDSS). The use of "Securite" signifies that the message will provide information which is vital for the safe navigation of vessels in the vicinity.

The choice of "Securite" specifically denotes that the content relates to navigational safety, such as information about navigational hazards, weather conditions, or other factors that could affect a vessel's safe passage. This alert allows those on watch to recognize the urgency of the message and prepare to receive crucial safety information that is essential for maintaining safety at sea.