An aluminum towed body was designed for use in hydroacoustic surveying of fish stocks in shallow (2–10 m depth) inland waters. The design allows applications in deep (>10 m) water bodies as well. Test results showed that the towed body was a stable platform for the hydroacoustic transducer. The towed body features adjustable beam direction, allowing a side-looking as well as a vertical-looking mode. As the design of the towed body is simple, it can be easily constructed by any skilled craftsman.
Mous, P. J., Kemper, J., & Schelvis, A. (1999). A towed body designed for side-scanning hydroacoustic surveying of fish stocks in shallow waters. Fisheries Research, 40, 97-98. https://doi.org/10.1016/S0165-7836(98)00213-6