"320B/R"@en . . . "1" . . . . "false" . "The Knudsen 320 B/R operates at different frequencies (12kHz and 3.5kHz). The 12kHz allows for water depth record and the 3.5kHz to track pingers attached to various instruments over the side. This is also used for sub-bottom profiling applications."@en . "accepted"@en . "2015-06-18 14:42:56.0" . "2015-06-18 14:42:56.0" . "Knudsen 320BR echosounder"@en . "SDN:L22::TOOL0892" . "1" . . . "SDN:L22::TOOL0892" . "SDN:L22::TOOL0892" . . "320B/R" .