| 摘要 |
PURPOSE:To learn the distribution of fish in the sea easily, by interposing a changeover switch section between a fish detector section, a present position displaying section and a screen display to let a fish signal and a present position signal transmit to the screen display selectively. CONSTITUTION:A changeover switch section 11 is interposed between a fish detector section 1, a present position measuring section 7 and a screen display 13 to let a fish signal and a present position signal to the screen display 13 selectively. Then, the distribution of fish in the sea is detected by the fish detecting section 1 and a fish signal outputted therefrom is inputted into the screen display 13 through the changeover switch section 11 to display the distribution of fish in the sea on the screen of the screen display 13. In this case, the image of fish and the image of present positions can be observed on one screen 14 alternately thereby enabling the finding of the distribution of fish in the sea easily.
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