Operation Guide 5028

Daylight Saving Time (summer time) advances the digital time setting by one hour

from Standard Time. Remember that not all countries or even local areas use Daylight

To toggle the Timekeeping Mode digital time between DST and Standard Time

1. In the Timekeeping Mode, hold down A until the seconds

start to flash, which indicates the setting screen.

3.Press D to toggle between Daylight Saving Time (

displayed) and Standard Time (

displayed).

• The DST indicator appears on the Timekeeping, Moon/

Tide Data, Alarm, and Hand Setting Mode screens to

indicate that Daylight Saving Time is turned on. In the

case of the Moon/Tide Data Mode, the DST indicator

SecondsDSTHourMinutes

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

Timekeeping

timekeeping. The procedures for setting the digital time

• The Moon phase indicator shows the current Moon

phase in accordance with the current date as kept in the

• The tide graph shows tidal movements for the current

date in accordance with the current time as kept in the

Important!

• Be sure to configure the current time and date, and your

Home Site data (data for the site where you use the

watch) correctly before using the functions of this watch.

Getting Acquainted

Congratulations upon your selection of this CASIO watch. To get the most out of your

purchase, be sure to read this manual carefully and keep it on hand for later reference

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

• 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

• 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.

• Button operations are indicated using the letters shown

• For the sake of simplicity, the sample displays in this

• 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

MA0804-EA

Mode

Mode

Mode

Mode

Mode

Mode

Mode

General Guide

• In any mode (except when a setting screen is on the display), press B to illuminate

Tide graph

Moon phase

Hour : Minutes

PM indicator

week

Use the Timekeeping Mode to set and view a digital display of the current time and date.

When setting the digital time, you can also configure settings for summer time

To set the digital time and date

seconds start to flash, which indicates the setting

2.Press C to move the flashing in the sequence shown

Screen

P

2008

-

To do this:

00

ON

Standard Time (

)

Change the year

Do this:

Press D.

4. Press A twice to exit the setting screen.

• The first press of A displays the UTC differential setting screen. Pressing A again

• Resetting the seconds only (without changing the DST, hour, or minute setting)

causes the analog minute hand setting to be adjusted automatically.

• See “Digital Time Daylight Saving Time (DST) Setting” below for details about the

• The day of the week is displayed automatically in accordance with the date (year,

DST indicator

Home Site Data

Moon phase, tide graph data, and Moon/Tide Data Mode data will not be displayed

properly unless Home Site data (UTC differential, longitude, and lunitidal interval) is

• The UTC differential is a value that indicates the time difference between a

reference point in Greenwich, England and the time zone where a city is located.

• The letters “UTC” is the abbreviation for “Coordinated Universal Time”, which is the

world-wide scientific standard of timekeeping. It is based upon carefully maintained

atomic (cesium) clocks that keep time accurately to within microseconds. Leap

seconds are added or subtracted as necessary to keep UTC in sync with the Earth’s

• 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/Lunitidal Interval Data List” at the back of this manual provides UTC

differential and longitude 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 batteries replaced. Change

these settings to match the area where you normally use the watch.

UTC differential (+9.0); Longitude (East 140 degrees); Lunitidal interval (5 hours,

To configure Home Site data

seconds start to flash, which indicates the setting

2.Press A again to display the UTC differential setting

3.Press C to move the flashing in the sequence shown

UTC

Longitude

East Longitude/

Lunitidal Interval

Lunitidal Interval

UTC differential