PURPOSE: To register measurement data such as a submarine depth or the like in a recording medium such as a memory card or the like to be read out and displayed at need.
CONSTITUTION: A device for displaying the track of an own ship with latitude and longitude lines according to the positional information from a position measuring device 1 such as GPS or the like, comprises a means 3 for detecting the submarine depth, a write and readout means 9 for writing own ship's positional information measured by the position measuring device 1 at the time of detection with depth information detected by the detecting means 3 in an external storage medium 10 and reading out information from the storage medium 10, and a color judging means for judging a display color corresponding to the depth information read out from the storage medium 10 according to designated data by display color designating means 11, 12. The track is displayed with a display color judged by the color judging means 23.
NISHIYAMA YOSHIHIRO
YAMAGUCHI TAKESHI
GOTO MASAE
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