SOFAR With SONAR. Water Acoustics.

What Lurks Below. Too Close For Comfort.

Passive Acoustics. Hydrophone Array To Determine Direction 'n Range Of Source Sound Signal. Fixed Seafloor Array. Or, Mobile Towed Line Array.

Active Acoustics. Long Frequency Sonar (100-500 Hz) For Long-Range Detection. Array Operating Depth At ~1000-1500 ft. 230 Underwater dB at 1m Source Level. 1-3 secs Pulse or Ping. Listening For The Echo Backs.

The Special SOFAR Channel Layer. SOund Fixing And Ranging Channel Layer. Low Frequency Signals <500 Hz Can Travel Whole Ocean Lengths. Thus, Hydrophone Array Can Listen And Receive Signals From Other Side Of Ocean.

A Sonar Drones Fleet. Submarine Detection And Ranging. For Ocean Conservation.