The Knudsen 320 is a high-resolution marine echosounder system widely used for sub-bottom profiling and bathymetric surveys in coastal and offshore environments. It’s a versatile tool for geophysical and geological research, including sediment characterization and habitat mapping. Commonly operates at 3.5 kHz (low frequency) for deep penetration into sediments, can also use higher frequencies (e.g., 12 kHz) for improved resolution in shallow layers.