METHOD AND DEVICE FOR MONITORING A RISK ZONE, IN PARTICULAR A BATHING ZONE

摘要

System for monitoring an open-air space, termed the monitored space, characterized in that it comprises: a. a computerized monitoring network comprising means (110) for transmitting/receiving in a frequency band lying between 135 MHz and 175 MHz (135.106 to 175.106 Hertz) according to a non-simultaneous bidirectional mode whose geographical coverage is equal to or greater than that of the monitored space; b. a portable device comprising a satellite-based positioning chip and means for transmitting and receiving information on the computerized monitoring network; c. computerized means (140) connected to the computerized monitoring network and comprising in memory means a geo-referenced map of the monitored space and a virtual geo-marking of a monitoring area whose geographical surface lies within the geographical range of the means of transmission/reception of the computerized monitoring network and display means (181) making it possible to view the monitored space.