Sonars

The so-called towfish is towed at small distance above the sea bottom, while emitting high frequency acoustic signals.  The signals are reflected off the sea bed and transformed by the sonar software into digital images of the sea bed.

In this way, objects on the sea floor become visible. To obtain high resolution acoustic data even in great depth and in inclined territory, the sonar was mounted to the submaersible LULA during several dives.

For archaeological work and acoustic mapping, we operate a Klein 3000 Side Scan Sonar.

For sonar operations, the catamaran ADA REBIKOFF was equipped with a hydraulic winch and 2300 metres of sonar cable, thus allowing sonar operations up to around 900 metres in depth.

The sonar software receives the geographical position  automatically from the DGPS receiver. This allows navigation along pre-defined tracks and to make the search paths visible on the sea chart.

The catamaran is equipped with a Multibeam sonar, for obtaining 3-dimensional bathimetric maps of the sea floor.

All images are property of the Rebikoff-Niggeler Foundation and must not be copied or used without prior consent.