| 摘要 |
PURPOSE:To display independently >=2 kinds of tide by providing a tide result storage means for storing >=2 kinds of tide which change according to calendars and areas. CONSTITUTION:Once a current area indicator 4a for indicating the current area is set to the current area, a today's calendar 1a is counted automatically every day by a time function, so the ebb tide time in the present area is known easily in current tide mode. Further, a mode button 3a for switching a time mode, current tide mode, and future tide mode successively and an area correction button 3f are set to confirm tide time of some future data in some area in future tide mode. |
