And real-time display at the Japan Coast Guard approval tidal harmonic constant data is based on in Japan 329 point tide graph 1 to 7 the change in the. Sun infested time, twilight time, the moon haunt time, age, lunar calendar, in addition, such as lunar, also it will show two weeks weather forecast. Prefecture map display and point selection feature, comes with a specified time vibrator alarm. Feature any of the operation of the touch & ball & shortcut keys are also available. Spoken period is from 1900 to 2100. The difference between the portable tide breaks is an optional add widgets and functions of the weather forecast.