| 摘要 |
PURPOSE:To obtain data effective in the navigation and fishing, by storing a water depth data, ship speed data and water temperature data into a memory to selectively display these data together with an ultrasonic echo data. CONSTITUTION:An ultrasonic echo data from a transmitter/receiver 2 is stored into a main memory 17 through a receiver 3, an A/D converter 4 and a transmitting/receiving submemory 5. A water depth data from a water depth computing unit 6 is stored into the main memory 17. Moreover, a water temperature data and a ship speed data from a water temperature sensor 7 and a ship speed sensor 14 are stored into the main memory 17. The water depth, ship speed and water temperature data are selectively displayed on a CRT tube display device 20 together with an ultrasonic echo data.
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