Fish Guidance Systems Limited products

Our Bio Acoustic Fish Fence (BAFF) is a non-physical fish deterrent that produces a linear barrier, guiding fish away from water intakes. Customised sound signals, directional strobe lighting and an air bubble curtain provide directional control. The BAFF also provides operational benefits by significantly reducing operational costs through a reduction of fish mortality.

The Sound Projector Array (SPA) systems are primarily used to deflect fish from entering water intakes and channels, but can also be used to deflect fish from within pumping chambers and herding them as part of fisheries management protection or exclusion measures. A SPA system is analogous to an underwater Public Address system that produces a repellent sound gradient in front of an intake and is used to block rather than guide fish. Repulsion efficiency is especially high for pelagic fish. Over the last 25 years FGS has installed over 100 SPA systems, and the systems now have sophisticated monitoring inbuilt diagnostics as well as optional active pressure compensator systems for locations where there are large tidal variations, or extended service intervals are required. Where additional deterrent is required the Sound Projectors are coupled with our High Intensity Lights to provide a SILAS system.

The SILAS system synchronises the pulse of a High Intensity Light with a signal from an acoustic system to provide an enhanced deflection stimulus, suitable for a wide variety of fish species. As well as enhancing the deflection effect for the majority of fish species, the High Intensity Lights of a SILAS system provides the added advantage of deflecting eels, which are not sensitive to acoustic systems. The SILAS technology can be provided both small scale applications by combining FGS’s High Intensity Light Bars.