. . . . "accepted"@en . "A single-beam navigational echo sounder optimised for measurements of water depth below keel in water depths less than 100m."@en . "SDN:L22::TOOL0273" . . "RD200A echosounder" . "RD200A echosounder"@en . "RD200A echosounder"@en . . . . . . .