"Atlas Hydrographic Hydrosweep DS multi beam echo sounder"@en . . "TOOL0911" . "A deep water multi-beam echo sounder which uses an operating frequency of 15.5 kHz to determine bathymetric depth. It can generate 59 receive beams per ping and has a swath width of 90 degrees. This is the 1st generation of the Hydrosweep DS which was replaced by the DS-2. Atlas Hydrographic is now part of the Teledyne Reson group." . .