Lightweight, compact and rugged, the DF-500 direction finder is a software-defined radio specifically designed for compatibility with all search and rescue (SAR) mission platform requirements. It can receive all current international distress frequencies, including 121.5 MHz, 243 MHz and COSPAS-SARSAT (406 MHz) – as well as Argos, automatic identification system (AIS) and digital selective calling (DSC)-encoded beacon signals.

Features & benefits

  • 30 to 407 MHz frequency range
  • SAR in international distress frequencies: 121.5 MHz and 243 MHz
  • COSPAS-SARSAT 406, including all extended channels
  • AIS distress; DSC message decoding and homing
  • Argos-1 beacons (401.650 MHz) search
  • Sonobuoy frequency band (FM) coverage and optimized localization
  • Flush-mounted, omnidirectional, vertically polarized antenna with permanent 360 degree scanning

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