Electronic locators are devices that enable us to determine the exact location of a man in the sea, as well as guide us to that location, provided that the drowning person has them. A lifejacket is part of the basic life-saving equipment. Lifejackets must be accessible to all crew members and passengers on board, and are therefore considered essential for rescuing human beings in the sea. In order to improve the identification of man in the sea, each lifejacket has to be equipped with a light and a whistle, and this is the only requirement that SOLAS imposes. However, there are devices on the market that could significantly improve the identification of a man in the sea, primarily the advanced automatic detection system that detects a man's fall into the sea, and also there are personal electronic locators. These systems are not required as part of the equipment and are therefore rarely used. In order to increase the likelihood of survival, it is necessary to have the system of early detection of a man's fall into the sea, as well as devices that can remotely identify the position, regardless of weather conditions or time of the day. The study analyzes the effectiveness of existing resources for easier human detection in the sea, i.e. lights and whistles on lifejackets, as well as modern electronic aids that can significantly improve the likelihood and speed of finding a man after falling into the sea.