APPLICATION OF SONAR IN UNDERWATER SEARCH OPERATIONS BY THE PARANÁ MILITARY FIRE DEPARTMENT

Abstract

This paper presents a technical analysis of the JW Fishers 450/950 kHz side-scan sonar and its application in underwater search operations conducted by the Paraná Military Fire Department (CBMPR). The equipment was successfully used in a real underwater search incident, clearly demonstrating its operational effectiveness by drastically reducing the time needed to locate missing victims. High-resolution characteristics and CHIRP technology show significant potential for rapidly locating submerged victims and objects across various scenarios, including rivers, lakes, and under specific conditions, at sea. The study addresses the primary advantages of using this equipment, such as reduced response time and enhanced safety for divers, as well as technical aspects guiding its operation. The importance of preventive maintenance, operational adjustments of frequency and cable length, and the relevance of appropriate vessels under adverse conditions are also discussed. It concludes that, with adequate training and rigorous preventive procedures, the JW Fishers 450/950 kHz sonar represents a significant advancement for CBMPR in future underwater search missions.