ELAC Echograph Senior / Echosounder for deep-sea fishing

An echosounder for deep-sea fishing, to determine depth of water, with dependable continuous indication of fish and shoals of fish. The instrument will additionally indicate the nature of the seabed and the presence of plankton and wrecks or rocks. An automatic 5-minute marker and the permanence of the graphs allow the chart to be evaluated accurately at a later date.