Liberal Dictionary English Dictionary
noun
- an instrument for determining depths under water, especially under a ship.
Liberal Dictionary: Speedtech® Depthmate Portable Sounder: GPS & Navigation
NASA Target 2 Depth Sounder, with transducer
Marine Boat Sonar Fishfinder/ Depth Sounder Gps Combo Transducer
Liberal Dictionary: New Digital Depth Sounder With Air & Water Temperature
Hondex High Frequency Digital Depth Sounder