Traveling in a boat, cruise ship or other vessel is very popular but it can be risky. Often people on cruise ships disappear or fall overboard. In both instances, the event occurs without anyone noticing until it is too late.

The likelihood of a successful rescue depends on the quickness of detecting the person overboard. Therefore, there is a need for an improved security system that can automatically detect and signal when a person falls overboard from a vessel, and that can determine the exact time and location of such an event in order to rescue the person in need.

It is evident there is a need for a security system that can detect a person overboard more accurately, that does not depend upon immersion of the activation device in water, and that would not be triggered by accidental or false alarms.

TADEO avoids and overcomes these and other problems by providing an automatic detecting and signalling system which is activated when a person, who is wearing a radio frequency identification (RFID) bracelet, falls overboard from a vessel into a body of water.

One or more RFID readers are placed surrounding the hull of the vessel that detects, individually, the passage of the bracelet worn by the person falling overboard through said RFID readers; each RFID reader is connected to a control unit onboard the vessel; the RFID reader transmits to the control unit the information obtained from the RFID tag. Therefore, the control unit records the exact time and location of the person overboard and sends the information to the control unit that activates the alarm system for facilitating the rescue of said person.