USER’S GUIDE 2572
Getting Acquainted
Congratulations upon your selection of this CASIO watch. To get the most out of your purchase, be sure to carefully read this manual and keep it on hand for later reference when necessary.
Warning!
•The longitude, lunitidal interval, Moon phase indicator, and tide graph data that appear on the display of this watch are not intended for navigation purposes. Always use proper instruments and resources to obtain data for navigation purposes.
•This watch is not an instrument for calculating low tide and high tide times. The tide graph of this watch is intended to provide a reasonable approximation of tidal movements only.
•CASIO COMPUTER CO., LTD. assumes no responsibility for any loss, or any claims by third parties that may arise through the use of this watch.
General Guide
•Press C to change from mode to mode.
•In any mode, press L to illuminate the display.
Timekeeping Mode | Press C. |
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Timekeeping
About This Manual
•Button operations are indicated using the letters shown
in the illustration.
• Each section of this manual provides you with the information you need to perform operations in each mode. Further details and technical information can be found in the “Reference” section.
(Light)Moon / Tide Data Mode | Coutdown Timer Mode | |
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Dual Time Mode | Stopwatch Mode | Alarm Mode |
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Moon phase indicator
PM | Tide graph |
indicator |
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Day of week
Month – Day
Hour : Minutes Seconds
To set the time and date
Year
Use the Timekeeping Mode to set and view the current time and date.
•The tide graph shows tidal movements for the current date in accordance with the current time as kept in the Timekeeping Mode.
•The Moon phase indicator shows the current Moon phase in accordance with the current date as kept in the Timekeeping Mode.
Important!
•Moon phase, tide graph data, and Moon/Tide Data Mode data will not be displayed properly unless the Timekeeping Mode current date and time settings and Home Site data are configured correctly. See “Home Site Data” for more information.
1.In the Timekeeping Mode, hold down A until the seconds start to flash, which indicates the setting screen.
2.Press C to move the flashing in the sequence shown below to select other settings.
Seconds 
Hour 
Minutes
Day Month Year
Format
To configure Home Site data
1.In the Timekeeping Mode, hold down A until the seconds start to flash, which indicates the setting screen.
2.Press A again to display the GMT differential setting screen.
3.Press C to move the flashing in the sequence shown below to select other settings.
GMT differential
GMT |
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| Longitude |
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| Lunitidal Interval |
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| Lunitidal Interval |
differential |
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| Hours |
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| Minutes | |
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4.When the setting you want to change is flashing, use D and B to change it as described below.
Setting | Screen | Button Operations |
| GMT differential |
| Use D (+) and B |
•You can specify a value in the range of
| Longitude | Use D (+) and B |
•You can specify a value in the range of 179°W to 180°E, in
| Lunitidal | Use D (+) and B |
| Interval Hours, |
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| Minutes |
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5. Press A to exit the setting screen.
3.When the setting you want to change is flashing, use D and B to change it as described below.
To change this setting Perform this button operation
| Seconds | Press D to reset to 00. |
| Hour, Minutes, Year, | Use D (+) and B |
| Month, Day |
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Press D to toggle between | |
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4. Press A twice to exit the setting screen.
•The first press of A displays the GMT differential setting screen. Pressing A again exits the setting screen.
•The
•The day of the week is automatically displayed in accordance with the date (year, month, and day) settings.
Home Site Data
Moon phase, tide graph data, and Moon/Tide Data Mode data will not be displayed properly unless Home Site data (GMT differential, longitude, and lunitidal interval) is configured correctly.
•The GMT differential is the time difference of the time zone where the site is located from Greenwich Mean Time.
•Note that you must add one hour to the GMT differential for your time zone whenever you change to Daylight Saving Time. Subtract one hour when you change back to Standard Time.
•The lunitidal interval is the time elapsing between the Moon’s transit over a meridian and the next high tide at that meridian. See “Lunitidal Interval” for more information.
•This watch displays lunitidal intervals in terms of hours and minutes.
•The “Site Data List” and “Lunitidal Interval List” provide GMT differential, longitude, and lunitidal interval information around the world.
•The following is the initial factory default Home Site data (Tokyo, Japan) when you first purchase the watch and whenever you have the battery replaced. Change these settings to match the area where you normally use the watch.
GMT differential (+9.0); Longitude (East 140 degrees); Lunitidal interval (5 hours, 20 minutes)
Moon/Tide Data
Moon phase indicator | Moon/tide data lets you view the Moon age and Moon | ||||
phase for a particular date, and tidal movements for a | |||||
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| Tide gragh | particular date and time for the Home Site. | |||
| • If you suspect that the Moon/tide data is not correct for | ||||
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| some reason, check the Timekeeping Mode data | |
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| (current time, date, and Home Site settings), and make | |
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| changes as required. | |
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| • See “Moon Phase Indicator” for information about the | |
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| Moon phase indicator and “Tide Graph” for information | |
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| about the tide graph. | |
| Moon | age | • All of the operations in this section are performed in the | ||
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| Moon/Tide Data Mode, which you enter by pressing C. | |
Moon/Tide Data Screens
Each press of A in the Moon/Tide Data Mode toggles between the Moon Data screen and the Tide Data screen.
Moon Data Screen | Tide Data Screen |
Moon phase indicator Moon age | Tide gragh |
| Time |
| Press A. |
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Year Month – Day
•When you enter the Moon/Tide Data Mode, the data that appears first is the Moon data (Moon age and Moon phase indicator) for the current date as kept by the Timekeeping Mode.
To view the Moon data for a particular date
While the Moon Data screen is displayed in the Moon/Tide Data Mode, use D (+) and
B
• You can select any date from 2000 to 2039.
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