| 摘要 |
PROBLEM TO BE SOLVED: To provide a positional information display device which can grasp the present position easily and get an accurate diving information. SOLUTION: Time information and position information are detected in a time detecting part 32 and a position detecting part 33 based on the signals which have been received by a GPS receiver 31, and in a tide detecting part 15 the tide information at a certain position and a certain date, which are specified by the position information and the time information, are searched and displayed. In an elevation detecting part 34 the elevation information of the position which was specified by the position information are specified, and pressure data of a pressure sensor 12 are corrected by a pressure correction circuit 13 according to the specified elevation information, based on which a diving information is calculated. When a storing indication is done at the departure position for a dive and the like, the position information is stored in a position information memory part 36. When a display indication for the positional relationship between is done at such an occasion in which the current position is not known and the like, the direction of the storing indication point at the current position based on the position information of the position in question and that in the position information memory part 36, and thus the direction of the starting position of the dive can be recognized. |
