CASIO GL190-1B
Owner's Manual

MO0212-A

USER�S GUIDE 2662
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.

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.

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� 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.

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Warning!

(Light)

General Guide
� Press C to change from mode to mode. � In any mode, press L to illuminate the display. Moon / Tide Data Mode Countdown Timer Mode

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Dual Time Mode

Stopwatch Mode

Alarm Mode

Timekeeping
Moon phase indicator

PM indicator

Tide graph

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.

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To configure Home Site data 1. In the Timekeeping Mode, hold down A until the seconds start to flash, which indicates the setting lllllll screen. ll 2. Press A again to display the GMT differential setting

Important! � Moon phase, tide graph data, and Moon/Tide Data Day of week Mode data will not be displayed properly unless the Timekeeping Mode current date and time settings and Month � Day Home Site data are configured correctly. See �Home Hour : Minutes Seconds Site Data� for more information.

GMT differential
GMT differential Longitude Lunitidal Interval Hours Lunitidal Interval Minutes

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To set the time and date
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 Month Year Minutes 12/24-Hour Day Format

4. When the setting you want to change is flashing, use D and B to change it as described below.

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Setting GMT differential

Longitude

Year

Lunitidal Interval Hours, Minutes

Use D (+) and B (�) to change the setting. � You can specify a value in the range of 179°W to 180°E, in 1-degree units. Use D (+) and B (�) to change the setting.

3. When the setting you want to change is flashing, use D and B to change it as described below. To change this setting Seconds Hour, Minutes, Year, Month, Day 12/24-Hour Format Perform this button operation Press D to reset to 00. Use D (+) and B (�) to change the setting. Press D to toggle between 12-hour (12H) and 24-hour (24H) timekeeping.

5. Press A to exit the setting screen.

Moon/Tide Data
Moon phase indicator Tide gragh

Moon/tide data lets you view the Moon age and Moon phase for a particular date, and tidal movements for a particular date and time for the Home Site. � If you suspect that the Moon/tide data is not correct for some reason, check the Timekeeping Mode data (current time, date, and Home Site settings), and make changes as required. � See �Moon Phase Indicator� for information about the Moon phase indicator and �Tide Graph� for information about the tide graph. � All of the operations in this section are performed in the Moon/Tide Data Mode, which you enter by pressing C.

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 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is applied in all modes. � The day of the week is automatically displayed in accordance with the date (year, month, and day) settings.

Moon age

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 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
Moon phase indicator Moon age

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� 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 (�) to display the date whose Moon data you want to view. � You can select any date from 2000 to 2039.

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screen. 3. Press C to move the flashing in the sequence shown below to select other settings.

Screen

Button Operations Use D (+) and B (�) to change the setting. � You can specify a value in the range of �11.0 to +14.0, in 0.5-hour unit.

Tide Data Screen
Tide gragh

Time

Press A.

Year Month � Day

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Timekeeping Mode

Press C.

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