MA0804-EA
Operation Guide 5028
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.
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.
Timekeeping
Mode
Moon/Tide Data
Mode
Stopwatch
Mode
Countdown Timer
Mode
Alarm
Mode
Dual Time
Mode
Hand Setting
Mode
Press
.
Digital Time Daylight Saving Time (DST) Setting
Timekeeping
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.
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.
Tide graph
Day of
week
Moon phase
indicator
To toggle the Timekeeping Mode digital time between DST and Standard Time
1. In the Timekeeping Mode, hold down A until the seconds
DST indicator
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 (
displayed) and Standard Time (
4. Press A twice to exit the setting screen.
ON
OF
displayed).
Important!
• 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.
• 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.
Hour : Minutes
Seconds
On/Off status
Month – Day
PM 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
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.
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.
• 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)
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.
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.
Screen
36
To do this:
Do this:
00
Reset the seconds to
ON
Toggle between Daylight Saving Time ( ) and
Standard Time (
Press D.
Press D.
OF
)
P
3. Press C to move the flashing in the sequence shown
below to select other settings.
10:08
2008
Change the hour or minutes
Change the year
Use D (+) and B (–).
6
-30
Change the month or day
UTC
Differential
Longitude
Value
East Longitude/
West Longitude
UTC differential
4. Press A twice to exit the setting screen.
• The first press of A displays the UTC differential setting screen. Pressing A again
Lunitidal Interval
Minutes
Lunitidal Interval
Hours
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.
1
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Operation Guide 5028
• SNZ indicator flashes during the 5-minute intervals between alarms.
Alarms
1
• Displaying the Alarm setting screen while the snooze alarm is turned on
You can set up to three independent multi-function alarms
with hour, minutes, month, and day. When an alarm is
turned on, the alarm tone sounds when the alarm time is
reached. One of the alarms can be configured as a
snooze alarm or a one-time alarm, while the other two are
one-time alarms.
1
automatically turns off the snooze alarm (making Alarm a one-time alarm).
Alarm date
(Month – Day)
Dual Time
The Dual Time Mode lets you keep track of time in a
different time zone. You can select Standard Time or
You can also turn on an Hourly Time Signal that causes
the watch to beep twice every hour on the hour.
DST indicator
Daylight Saving Time for the Dual Time Mode time.
• In the Dual Time Mode, the seconds count is
synchronized with the seconds count of the current
digital time.
Timekeeping
Mode time
1
3
• There are three alarms numbered through . You can
1
configure Alarm as a snooze alarm or a one-time
alarm. Alarms and can be used as one-time alarms
only.
2
3
Alarm time
(Hour : Minutes)
• All of the operations in this section are performed in the
Alarm Mode, which you enter by pressing C.
To set the Dual Time
Alarm number
1. Press C to enter the Dual Time Mode.
2. In the Dual Time Mode, hold down A until the DST
setting starts to flash, which indicates the setting
screen.
3. Press C to move the flashing in the sequence shown
below to select the other setttings.
Alarm Types
The alarm type is determined by the settings you make, as described below.
Dual time
(Hour : Minutes)
• Daily alarm
Set the hour and minutes for the alarm time. This type of setting causes the alarm to
sound everyday at the time you set.
DST
Hour
Minutes
• Date alarm
Set the month, day, hour and minutes for the alarm time. This type of setting causes
the alarm to sound at the specific time, on the specific date you set.
4. When the setting you want to change is flashing, use B and D to change it as
described below.
• 1-Month alarm
Set the month, hour and minutes for the alarm time. This type of setting causes the
alarm to sound everyday at time you set, only during the month you set.
Screen
To do this:
Do this:
ON
Toggle between Daylight Saving Time ( ) and Press D.
• Monthly alarm
OF
Standard Time (
)
Set the day, hour and minutes for the alarm time. This type of setting causes the alarm
to sound every month at the time you set, on the day you set.
A
8:08
Change the hour or minutes
Use D (+) and B (–).
5. Press A to exit the setting screen.
To set an alarm time
• The DST indicator on the Dual Time Mode screen indicates that DST is turned on for
1. In the Alarm Mode, use D to scroll through the alarm
screens until the one whose time you want to set is
displayed.
the Dual Time Mode time.
Illumination
This watch has an EL (electro-luminescent) panel that
causes the entire display to glow for easy reading in the
dark.
• See “Illumination Precautions” for more important
information.
• To set a one-time alarm, display one of the screens
2
3
indicated by alarm number or . To set the snooze
1
alarm, display the screen indicated by
.
2. After you select an alarm, hold down A until the hour
setting of the alarm time starts to flash, which indicates
the setting screen.
To illuminate the face of the watch
In any mode (except when a setting screen is on the
display), press B to illuminate the face of the watch.
• You can use the procedure below to select either
1.5 seconds or 3 seconds as the illumination duration.
When you press B, the illumination will remain on for
about 1.5 seconds or 3 seconds, depending on the
current illumination duration setting.
• This operation automatically turns on the alarm.
3. Press C to move the flashing in the sequence shown below to select other
settings.
Hour
Minutes
Month
Day
To specify the illumination duration
1. In the Timekeeping Mode, hold down A until the
seconds start to flash, which indicates the setting
screen.
4. While a setting is flashing, use D (+) and B (–) to change it.
• To set an alarm that does not include a month (daily alarm, monthly alarm),
x
x
set for the month. Use D and B until the mark appears (between 12 and 1)
while month setting is flashing.
2. While the seconds are flashing, press B to toggle the
• To set an alarm that does not include a day (daily alarm, 1-month alarm),
x
xx
xx
mark appears (between the end
illumination duration between 1.5 seconds ( ) and 3
set
for the day. Use D and B until the
seconds ( ).
3. Press A twice to exit the setting screen.
of the month and 1) while the day setting is flashing.
• When setting the alarm time using the 12-hour format, take care to set the time
correctly as a.m. (A indicator) or p.m. (P indicator).
5. Press A to exit the setting screen.
Alarm Operation
Reference
The alarm tone sounds at the preset time for 10 seconds, regardless of the mode the
watch is in. In the case of the snooze alarm, the alarm operation is performed a total
of seven times, every five minutes, until you turn the alarm off or change it to a one-
time alarm.
This section contains more detailed and technical information about watch operation.
It also contains important precautions and notes about the various features and
functions of this watch.
• To stop the alarm tone after it starts to sound, press any button.
• Performing any one of the following operations during a 5-minute interval between
snooze alarms cancels the current snooze alarm operation.
Displaying the Timekeeping Mode setting screen
Moon Phase Indicator
The Moon phase indicator of this watch indicates the current phase of the Moon as
shown below.
1
Displaying the alarm setting screen
(part you cannot see)
Moon phase (part you can see)
Moon Phase
Indicator
To test the alarm
In the Alarm Mode, hold down D to sound the alarm.
0.0-1.8
Moon Age
2
3
1.9 - 5.5 5.6 - 9.2 9.3 - 12.9 13.0-16.6 16.7-20.2 20.3-23.9 24.0-27.6
27.7- 29.5
To turn Alarms and , and the Hourly Time Signal on and off
1. In the Alarm Mode, use D to select a one-time alarm
Moon Phase New
First
Full
Moon
Last
Quarter
(Waning)
2
3
:00
(alarm number or ) or the Hourly Time Signal ( ).
Moon
Quarter
(Waxing)
2. Press A to toggle it on and off.
2
3
• Turning on a one-time alarm ( or ) displays the alarm
on indicator on its screen.
• The Moon phase indicator shows the Moon as viewed at noon from a position in the
Northern Hemisphere looking south. Note that at times the image shown by the
Moon phase indicator may differ from that of the actual Moon in your area.
• The left-right orientation of the Moon phase is reversed when viewing from the
Southern Hemisphere or from a point near the equator.
• Turning on the Hourly Time Signal displays the hourly
time signal on indicator.
• The alarm on (ALM) indicator and Hourly time Signal on
(SIG) indicator are displayed in all modes.
Alarm on indicator
Moon Phases and Moon Age
The Moon goes through a regular 29.53-day cycle. During each cycle, the Moon
appears to wax and wane as the relative positioning of the Earth, Moon, and Sun
changes. The greater the angular distance between the Moon and the Sun,* the more
we see illuminated.
The angle to the Moon in relation to the direction at which the Sun is visible from the
*
Hourly time signal on
indicator
Earth.
This watch performs a rough calculation of the current Moon age starting from day 0
of the moon age cycle. Since this watch performs calculations using integer values
only (no fractions), the margin for error of the displayed Moon age is 1 day.
1
To select the operation of Alarm
1. In the Alarm Mode, use D to select Alarm
2. Press A to cycle through the available settings in the sequence shown below.
1
.
Alarm on
Snooze
alarm on
Alarm off
• The applicable alarm on indicator (SNZ ALM) is displayed in all modes when an
alarm is turned on.
3
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Operation Guide 5028
Tide Graph
Site/Lunitidal Interval Data List
The Tide Graph has six graphic segments, each of which indicates a different tide
level. The current tide level is indicated by the displayed graphic segment.
UTC Differential
Lunitidal
Interval
Site
Standard
Time
DST/
Summer Time
Longitude
Anchorage
Bahamas
Baja, California
Bangkok
Boston
Buenos Aires
Casablanca
Christmas Island
Dakar
Gold Coast
Great Barrier Reef, Cairns
Guam
Hamburg
Hong Kong
Honolulu
Jakarta
–9.0
–5.0
–7.0
+7.0
–5.0
–3.0
+0.0
+14.0
+0.0
+10.0
+10.0
+10.0
+1.0
+8.0
–10.0
+7.0
+3.0
+5.0
–10.0
–5.0
+0.0
+0.0
–8.0
+5.0
+8.0
+4.0
+10.0
–5.0
+11.0
–11.0
+9.0
–5.0
–10.0
–3.0
–8.0
+8.0
+8.0
+10.0
+9.0
–8.0
+12.0
–8.0
–4.0
–6.0
+8.0
–4.0
–2.0
+1.0
+15.0
+1.0
+11.0
+11.0
+11.0
+2.0
+9.0
–9.0
+8.0
+4.0
+6.0
–9.0
–4.0
+1.0
+1.0
–7.0
+6.0
+9.0
+5.0
+11.0
–4.0
+12.0
–10.0
+10.0
–4.0
–9.0
–2.0
–7.0
+9.0
+9.0
+11.0
+10.0
–7.0
+13.0
149°W
77°W
110°W
101°E
71°W
58°W
8°W
158°W
17°W
154°E
146°E
145°E
10°E
5:40
7:30
8:40
4:40
11:20
6:00
1:30
4:00
7:40
8:30
9:40
7:40
4:50
9:10
3:40
0:00
6:30
10:10
4:00
5:20
2:00
1:10
9:20
0:10
10:30
0:50
2:10
7:30
8:30
6:40
7:30
3:00
0:10
3:10
4:20
1:20
10:20
8:40
5:20
5:10
4:50
H
L
High Tide
Low Tide
(Rising Tide)
Tidal Movements
(Falling Tide)
(Rising Tide)
Tides are the periodic rise and fall of the water of oceans, seas, bays, and other
bodies of water caused mainly by the gravitational interactions between the Earth,
Moon and Sun. Tides rise and fall about every six hours. The tide graph of this watch
indicates tidal movement based on the Moon’s transit over a meridian and the lunitidal
interval. The lunitidal interval differs according to your current location, so you must
specify a lunitidal interval in order to obtain the correct tide graph readings.
• The tide graph displayed by this watch is based on the current Moon age.
114°E
158°W
107°E
39°E
Jeddah
Karachi
Kona, Hawaii
Lima
Lisbon
67°E
156°W
77°W
9°W
Remember that the margin for error of the Moon age displayed by this watch is
day. The greater the error in a particular Moon age, the greater the error in the
resulting tide graph.
1
London
0°E
118°W
74°E
121°E
57°E
Los Angeles
Maldives
Manila
Mauritius
Melbourne
Miami
Noumea
Pago Pago
Palau
Panama City
Papeete
Rio De Janeiro
Seattle
Shanghai
Singapore
Sydney
Lunitidal Interval
Theoretically, high tide is at the Moon’s transit over the meridian and low tide is about
six hours later. Actual high tide occurs somewhat later, due to factors such as
viscosity, friction, and underwater topography. Both the time differential between the
Moon’s transit over the meridian until high tide and the time differential between the
Moon’s transit over the meridian until low tide are known as the “lunitidal interval”.
When setting the lunitidal interval for this watch, use the time differential between the
Moon’s transit over the meridian until high tide.
145°E
80°W
166°E
171°W
135°E
80°W
150°W
43°W
122°W
121°E
104°E
151°E
140°E
123°W
175°E
Button Operation Tone
The button operation tone sounds any time you press one
of the watch’s buttons. You can turn the button operation
tone on or off as desired.
• Even if you turn off the button operation tone, the alarm,
Hourly Time Signal, and Countdown Timer Mode alarm
all operate normally.
Tokyo
Vancouver
Wellington
*Based on data as of 2003.
To turn the button operation tone on and off
In any mode (except when a setting screen is on the display), hold down C to toggle
the button operation tone on ( not displayed) and off ( displayed).
• Holding down C to turn the button operation tone on or off also causes the watch’s
current mode to change.
• The
off.
indicator is displayed in all modes when the button operation tone is turned
Auto Return Features
• If you leave a screen with flashing digits on the display for two or three minutes
without performing any operation, the watch automatically exits the setting screen.
• If you leave the watch in the Moon/Tide Data, Alarm or Hand Setting Mode for two or
three minutes without performing any operation, it automatically changes to the
Timekeeping Mode.
Scrolling
The B and D buttons are used in various modes and setting screens to scroll
through data on the display. In most cases, holding down these buttons during a scroll
operation scrolls through the data at high speed.
Timekeeping
00
• Resetting the seconds to
while the current count is in the range of 30 to 59
causes the minutes to be increased by 1. In the range of 00 to 29, the seconds are
00
reset to
without changing the minutes.
• The year can be set in the range of 2000 to 2099.
• The watch’s built-in full automatic calendar makes allowances for different month
lengths and leap years. Once you set the date, there should be no reason to change
it except after you have the watch’s batteries replaced.
Illumination Precautions
• Illumination may be hard to see when viewed under direct sunlight.
• Illumination automatically turns off whenever an alarm sounds.
• Frequent use of illumination runs down the batteries.
4
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