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Direction Finder RT-400 for the SAR system of the Republic of Serbia

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Nov 17 2025

Direction Finder RT-400 for the SAR system of the Republic of Serbia

The Civil Aviation Directorate of the Republic of Serbia, as in charged institution in the Republic of Serbia for organizing and managing the Search and Rescue system in civil aviation, has purchased the specialized equipment Portable Wide Band Direction Finder RT-400, to locate and decode Cospas-Sarsat 406 MHz beacons (ELTs, EPIRBs and PLBs) for land searches.

The device can be mounted on vehicles or carried in the DF-system backpack by rescuers for versatility in all types of terrain.

The main purpose of this system is to have better localization by triangulation or decoding of Cospas-Sarsat (406 MHz) messages and displaying beacon positions on the map in all weather conditions, cause the DF-system is a water-resistant system for use during inclement weather. Operating temperature -20 to +55 °C.

The activation of a 406 MHz radio beacon (ELT, EPIRB, PLB) indicates that an aircraft, vessel, or person is in a potential distress situation. The use of the DF RT-400 device will improve the current SAR capacities of the Rescue Coordination Center-Belgrade of the Civil Aviation Directorate of the Republic of Serbia, to quickly locate the position of people in distress, via an activated 406 MHz beacon, especially in complex weather conditions.

Frequency Range:

118.000 to 124.000 MHz;

154.000 to 163.000 MHz;

240.000 to 246.000 MHz;

400.000 to 410.000 MHz;

The product RT-400 is in compliance with the essential requirements and other relevant provisions of:

• Directive 2014/53/EU relating to radio equipment (relevant for RT-400 AU)

• Directive 2014/30/EU relating to electromagnetic compatibility (relevant for RT-400 Power Pack)

With the procurement of the Direction Finder for land searches, the Civil Aviation Directorate of the Republic of Serbia continuously improve the existing capacity of the aeronautical search and rescue system in the civil aviation of the Republic of Serbia.

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