1
Operation Guide 5028
Digital Time Daylight Saving Time (DST) Setting
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
Saving Time.
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.
2. Press C once to display the DST setting screen.
3. Press D to toggle between Daylight Saving Time (
ON
displayed) and Standard Time (
OF
displayed).
4. Press A twice to exit the setting screen.
• 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
appears on the tide data screen only.
Seconds DST Hour Minutes
Day Month Year
3. When the setting you want to change is flashing, use B and D to change it as
described below.
Timekeeping
This watch features separate digital and analog
timekeeping. The procedures for setting the digital time
and analog time are different.
• The Moon phase indicator shows the current Moon
phase in accordance with the current date as kept in the
Timekeeping Mode.
• The tide graph shows tidal movements for the current
date in accordance with the current time as kept in the
Timekeeping Mode.
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.
See “Home Site Data” for more information.
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
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.
About This Manual
• Button operations are indicated using the letters shown
in the illustration.
• For the sake of simplicity, the sample displays in this
manual do not show the analog hands of the watch.
• 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.
MA0804-EA
Timekeeping
Mode
Moon/Tide Data
Mode
Stopwatch
Mode
Countdown Timer
Mode
Alarm
Mode
Dual Time
Mode
Hand Setting
Mode
Press .
General Guide
• Press C to change from mode to mode.
• In any mode (except when a setting screen is on the display), press B to illuminate
the face of the watch.
Tide graph
Month – Day
Moon phase
indicator
Hour : Minutes
Seconds
PM indicator
Day of
week
Digital Time and Date
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
(Daylight Saving Time or DST).
To set the digital 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 the other settings.
Screen
36
P
10:08
2008
6
-
30
To do this:
Reset the seconds to
00
Toggle between Daylight Saving Time (
ON
) and
Standard Time (
OF
)
Change the hour or minutes
Change the year
Change the month or day
Do this:
Press D.
Press D.
Use D (+) and B (–).
4. Press A twice to exit the setting screen.
• The first press of A displays the UTC differential setting screen. Pressing A again
exits the setting screen.
• 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
DST setting.
• The day of the week is displayed automatically in accordance with the date (year,
month, and day) settings.
DST indicator
On/Off status
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
configured correctly.
• 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
rotation.
• 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,
20 minutes)
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 UTC differential setting
screen.
3. Press C to move the flashing in the sequence shown
below to select other settings.
UTC
Differential
Longitude
Value
East Longitude/
West Longitude
Lunitidal Interval
Hours
Lunitidal Interval
Minutes
UTC differential
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