| 摘要 |
PROBLEM TO BE SOLVED: To provide a fish finder for easily correlating past echo information with the position of one's own ship. SOLUTION: Control is performed so that the echo information at the time specified by a measurement information specifying means 26 is positioned on a previously defined reference line in a window 28 for echo display. Control is performed so that the position of one's own ship at which echo information specified by the measurement information specifying means 26 is measured is positioned on a previously defined origin in a window 27 for track display on a track image 29 displayed on the window 27 for track display. COPYRIGHT: (C)2008,JPO&INPIT
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