Particularly applicable to life jackets and suits, it makes it possible to provide a location and maximum safety of shipwrecked people who have fallen overboard, providing, in the event of a man overboard (MOB) situation, a fast and effective solution, as the alert system continues in its attempt to communicate until a vessel responds with a signal of acknowledgement. The alert system fundamentally stands out due to the location and communication achieved by the DSC calling device and the AIS identification device. For its part, the control process stands out as it allows performing a repetition of search in the localization of the vessels in the immediate vicinity of the own vessel (vessel that the crew member comes from), so that if said own ship does not respond to the emergency call of the shipwrecked person, it communicates with other adjacent vessels.