Medusa is the world’s first passive acoustic drifter with real-time processing and Iridium satellite link.

  • Iridium-satellite connected passive acoustic drifter

  • Real-time noise band calculation

  • Whistle detection

  • Wav files saved to removable microSD

  • Accelerometer, magnetometer, gyroscope

  • Integrated rechargeable lithium-ion batteries



Summary data are sent to Loggerhead Earth, a cloud-computing database with real-time web display. GPS coordinates are sent in real-time to handheld satellite to aid in recovery. Custom cloud deployments are available.


  • Sample Rate: 44.1kHz

  • Memory Card: 64 GB

  • Power: Rechargeable lithium ion (8x 5Ah)

  • Housing: 24” x 3” diameter PVC

  • Depth: 1 m (surface drifter)

Specification Sheet