MO0404-EB
Operation Guide 2836
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.
Expose the watch to bright light to charge its battery before using it.
You can use this watch even as its battery is being charged by exposure to bright
light.
• Be sure to read “Battery” of this manual for important information you need to
know when exposing the watch to bright light.
If the display of the watch is blank...
General Guide
• Press C to change from mode to mode.
• In any mode, press L to illuminate the display.
If the SLEEP indicator is on the display, it means that the
display is blank because the watch’s Power Saving
function has turned off the display to conserve power.
Power Saving automatically turns off the display and puts
the watch into a sleep state whenever your watch is left for
a certain period where it is dark.
• The initial factory default setting is Power Saving on.
• The watch recovers from the sleep state if you move it to
a well-lit area
the watch towards your face for reading.
It can take up to five seconds for the display to turn on.
*
• See “Power Saving Function” for more information.
Timekeeping Mode
, if you press any button, or if you angle
*
Press C.
• 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
(Light)
Moon / Tide Data Mode Countdown Timer Mode
▲
Dual Time Mode
Warning!
• 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.
▲
Stopwatch Mode
Alarm Mode
▲
▲
Timekeeping
Use the Timekeeping Mode to set and view the current
Day of week
PM
indicator
Tide graph
Month – Day
Moon phase
indicator
Hour : Minutes Seconds
To set the time and date
Year
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
Power Saving
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.
• See “Power Saving Function” for details about configuring Power Saving settings.
• 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.
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.
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
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below to select other settings.
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Seconds
Power Saving
Hour
Day Month
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.
Press D to toggle Power Saving on (ON) and off
(OFF).
Minutes
12/24-Hour
Forma t
Year
▲
• 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/Lunitidal Interval Data List” provides 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, whenever battery power drops to Level 4, 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)
To configure Home Site data
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GMT differential
4. When the setting you want to change is flashing, use D and B to change it as
described below.
Setting
GMT differential
Longitude
Lunitidal Interval
Hours, Minutes
5. Press A to exit the setting screen.
1. In the Timekeeping Mode, hold down A until the
seconds start to flash, which indicates the setting
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screen.
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2. Press A again to display the GMT differential setting
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screen.
3. Press C to move the flashing in the sequence shown
below to select other settings.
GMT
differential
Longitude
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 units.
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.
▲
Lunitidal Interval
Hours
Lunitidal Interval
Minutes
Moon/Tide Data
Moon/tide data lets you view the Moon age and Moon
phase for a particular date, and tidal movements for a
Moon age
Tide gragh
Moon phase indicator
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.
1
Operation Guide 2836
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
Year Month – Day
Press A.
▲
Moon phase indicator
• 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.
To view tide data for a particular time
1. While the Moon Data screen is displayed in the Moon/Tide Data Mode, use D (+)
and B (–) to display the date whose tide data you want to view.
2. Press A to switch to the Tide Data screen.
• The initial screen shows the tide graph for 6:00 AM.
3. Specify the time for which you want to display tide data.
• Use D (+) and B (–) to change the time in one-hour steps.
Moon age
Tide Data Screen
Time
▲
Tide gragh
Countdown Timer
Timekeeping Mode time
Seconds
Minutes
Configuring the Countdown Timer
The following are the settings you should configure before actually using the
countdown timer.
Countdown start time and reset time
Timer mode (auto-repeat, elapsed time)
Progress beeper on/off
• See “To configure the countdown timer” for information about setting up the timer.
Reset Time
You can set a “reset time,” which is a kind of alternate countdown start time you can
recall with the press of a button any time a countdown operation is in progress.
Timer Mode
The countdown timer gives you a choice of two modes: auto-repeat and elapsed time.
Auto-repeat
Auto-repeat mode automatically restarts the countdown from the countdown start time
you set whenever zero is reached.
• Auto-repeat mode is best when timing the starts of match races.
• Even if you start a countdown operation from the reset time, the countdown
automatically restarts from the countdown start time whenever it reaches zero.
• Auto repeat timing repeats up to seven times.
Elapsed Time
When the end of the countdown is reached in the elapsed time mode, the timer
automatically switches to an elapsed time measurement operation.
• The elapsed time mode is best when timing the speed of yachts during ocean races.
• The elapsed time operation is performed in one-second increments up to 99 hours,
59 minutes, 59 seconds.
Countdown Timer Beeper Operations
The watch beeps at various times during a countdown so you can keep informed
about the countdown status without looking at the display. The following describes the
types of beeper operations the watch performs during a countdown.
Countdown End Beeper
The watch beeps each second of the final 10 seconds before a countdown reaches
zero, and at zero. The first five beeps (seconds 10 through 6) are higher pitched than
the final five beeps (seconds 5 through 1). The watch emits a longer beep to signal
when the countdown reaches zero.
• The countdown end beeper always sounds, regardless of the on/off status of the
progress beeper.
Progress Beeper
The progress beeper actually includes two beepers: a reset time beeper and a reset
period progress beeper.
• The reset time beeper and reset period progress beeper sound only while the
progress beeper is turned on.
Reset Time Beeper
The reset time beeper is similar to the countdown end beeper. When the progress
beeper is turned on, the watch beeps each second of the final 10 seconds before the
countdown reaches the reset time.
Reset Period Progress Beeper
The reset period is the portion of the countdown between the reset time and zero.
When the progress beeper is turned on, the watch emits four short beeps at the top of
each minute during the reset period, and 30 seconds before the end of the
countdown.
The countdown timer can be set within a range of one
minute to 60 minutes. An alarm sounds when the
countdown reaches zero. The countdown timer has two
modes: auto-repeat and elapsed time, and a progress
beeper signals the progress of the countdown. All of this
makes the countdown timer a valuable tool for timing the
start of a yacht race.
• All of the operations in this section are performed in the
Countdown Timer Mode, which you enter by pressing
C.
Countdown Timer Examples
Countdown start time: 10 minutes; Reset time: 5 minutes; Timer mode: Auto-repeat;
Progress beeper: On
Start Time Reset Time
10'00"
Reset Time Beeper
Countdown start time: 10 minutes; Reset time: 5 minutes; Timer mode: Elapsed time;
Progress beeper: Off
Start Time Reset Time
10'00"
To configure the countdown timer
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1. While the countdown start time is on the display in the
2. Press C to move the flashing in the sequence shown
3. When the setting you want to change is flashing, use D and B to change it as
described below.
Setting
Start Time
Reset Time
Timer Mode
Progress
Beeper
4. Press A to exit the setting screen.
• The reset time setting must be less than the countdown start time setting.
To use the countdown timer
Screen
Use D (+) and B (–) to change the setting.
• You can set a start time in the range of 1 to 60 minutes
Use D (+) and B (–) to change the setting.
• You can set a reset time in the range of 1 to 5 minutes
Press D to toggle between the auto-repeat mode (ON)
and the elapsed time mode (OFF).
• An auto-repeat indicator (
Press D to toggle progress beeper on (ON) and off (OFF).
• A progress beeper indicator (
In the Countdown Timer Mode, press D to start the
countdown timer.
• The countdown timer measurement operation continues
• The table below describes button operations you can
To do this:
Stop the countdown operation
Resume a stopped countdown operation
Display the countdown start time
Stop the countdown operation and display the reset time
Start the countdown from the displayed reset time
• The table below describes button operations you can perform during an elapsed
time measurement operation in the elapsed time mode.
To do this:
Stop the elapsed time operation
Resume a stopped elapsed time operation
Display the countdown start time
Stop the elapsed time operation and display the reset time
Start the countdown from the displayed reset time
Reset Period
Reset Period Progress Beeper
Countdown
End Beeper
Countdown Timer Mode, hold down A until the
countdown start time setting starts to flash, which
indicates the setting screen.
• If the countdown start time is not displayed, use the
procedure under “To use the countdown timer” to
display it.
Countdown
End Beeper
0'00"1'00" 0'30"2'00"3'00"4'00"5'00"
Elapsed time
measurement
0'00"5'00"
below to select other settings.
Start
Time
Reset
Time
Timer
Mode
Progress
Beeper
Button Operations
in 1-minute increments.
in 1-minute increments.
repeat mode is selected.
setting is turned on.
) appears when the auto-
) appears when this
even if you exit the Countdown Timer Mode.
perform to control countdown operations.
Do this:
Press D.
Press D again.
While the countdown is
stopped, press B.
Press B.
Press D.
Do this:
Press D.
Press D again.
While the elapsed time is
stopped, press B.
Press B.
Press D.
Alarms
Timekeeping Mode time
Alarm time
(Hour : Minutes)
• There are five alarm screens numbered 1 through 5. The hourly time signal screen
is indicated by :00. The brightness alarm screen shows ON or OFF.
• When you enter the Alarm Mode, the screen you were viewing when you last exited
the mode appears first.
• All of the operations in this section are performed in the Alarm Mode, which you
enter by pressing C.
You can set five independent Daily Alarms. 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 four are
one-time alarms.
You can also turn on an Hourly Time Signal that causes
the watch to beep twice every hour on the hour, and a
brightness alarm that beeps whenever the watch is moved
Alarm
from an area where it is dark to an area where it is light.
number
2
Operation Guide 2836
To set an alarm time
• You can configure Alarm 1 as a snooze alarm or a one-time alarm. Alarms 2
through 5 can be used as one-time alarms only.
• The snooze alarm repeats every five minutes.
2. After you select an alarm, hold down A until the hour setting of the alarm time
starts to flash. This indicates the setting screen.
3. Press C to move the flashing between the hour and minute settings.
4. While a setting is flashing, use D (+) and B (–) to change it.
• When setting the alarm time using the 12-hour format, take care to set the time
correctly as a.m. (no indicator) or p.m. (P indicator).
5. Press A to exit the setting screen.
Alarm Operation
The alarm sounds at the preset time for about 10 seconds. 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.
The watch also has a brightness alarm. When turned on, the brightness alarm causes
the watch to beep for 10 seconds when the watch is brought from the dark into the
light. The following are the conditions for brightness alarm operation.
• The watch needs to be in the dark for about 30 to 35 minutes for the brightness
alarm to become activated.
• The brightness alarm sounds for about 10 seconds, about 15 to 20 minutes after the
watch is next exposed to light.
• The brightness alarm sounds only once and then turns off automatically.
Note
• Pressing any button stops the alarm tone operation.
• 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
Displaying the Alarm
To test the alarm
In the Alarm Mode, hold down D to sound the alarm.
To turn Alarms
One-time alarm on
indicator
To select the operation of Alarm
1. In the Alarm Mode, use D to select Alarm 1.
2. Press B to cycle through the available settings in the sequence shown below.
One-time alarm on Snooze alarm on Alarm off
• The applicable alarm on indicator ( or ) is displayed in all modes when an
alarm is turned on.
• The SNZ indicator flashes during the 5-minute intervals between alarms.
• Displaying the Alarm 1 setting screen while the snooze alarm is turned on
automatically turns off the snooze alarm (making Alarm 1 a one-time alarm).
To turn the hourly time signal and the brightness alarm on and off
Hourly time signal on
indicator
Brightness alarm on
indicator
1. In the Alarm Mode, use D to scroll through the alarm
screens until the one whose time you want to set is
displayed.
ON or OFF
1
setting screen
22
55
2
through
5
22
on and off
55
1. In the Alarm Mode, use D to select a one-time alarm
(alarm number 2 through 5).
2. Press B to toggle the displayed alarm on and off.
• Turning on a one-time alarm (2 through 5) displays the
one-time alarm on indicator (
• The one-time alarm on indicator is displayed in all
modes.
• If any alarm is on, the alarm on indicator is shown on
the display in all modes.
11
1
11
SNZ indicator and one-time alarm on indicator
SNZ
1. In the Alarm Mode, use D to select the Hourly Time
Signal or the brightness alarm.
2. Press B to toggle the displayed item on and off.
• Turning on the Hourly Time Signal displays the hourly
time signal on indicator (
• Turning on the brightness alarm displays the brightness
alarm on indicator (BRT) on its screen.
• The hourly time signal on indicator and brightness alarm
on indicator are displayed in all modes.
:00 x5
) on its screen.
x3 x4x1 x2
) on its screen.
To measure times with the stopwatch
Elapsed Time
D
Start Stop
Split Time
D
Start Split
Two Finishes
D
Start Split
D
➤
B
➤
(SPL displayed)
B
➤
First runner
finishes.
Display time of
first runner.
D
➤
Re-start Clear
B
➤
Split release
D
➤
Stop
Second runner
finishes.
D
➤
Stop
D
➤
Stop
B
➤
Split release
Display time of
second runner.
B
➤
B
➤
Clear
B
➤
Clear
Dual Time
The Dual Time Mode lets you keep track of time in a
different time zone.
Timekeeping Mode time
Dual time
(Hour : Minutes Seconds)
• The seconds count of the Dual Time is synchronized
with the seconds count of the Timekeeping Mode.
To set the Dual Time
1. Press C to enter the Dual Time Mode.
2. Use A, B, and D to set the Dual Time Mode time.
• Each press of D (+) and B (–) changes the time
setting in 30-minute increments.
• Pressing A sets the Dual Time Mode to the same time
as the Timekeeping Mode.
Backlight
Auto light switch
on indicator
About the Auto Light Switch
Turning on the auto light switch causes the backlight to turn on for about one second,
whenever you position your wrist as described below in any mode. Note that this
watch features a “Full Auto EL Light,” so the auto light switch operates only when
available light is below a certain level. It does not turn on the backlight under bright
light.
Moving the watch to a position that is parallel to the ground and then tilting it towards
you more than 40 degrees causes the backlight to turn on.
• Wear the watch on the outside of your wrist.
Warning!
• Always make sure you are in a safe place whenever you are reading the
display of the watch using the auto light switch. Be especially careful when
running or engaged in any other activity that can result in accident or injury.
Also take care that sudden illumination by the auto light switch does not
surprise or distract others around you.
• When you are wearing the watch, make sure that its auto light switch is turned
off before riding on a bicycle or operating a motorcycle or any other motor
vehicle. Sudden and unintended operation of the auto light switch can create a
distraction, which can result in a traffic accident and serious personal injury.
To turn the auto light switch on and off
In the Timekeeping Mode, hold down D for about two seconds to toggle the auto light
switch on (A. EL displayed) and off (A. EL not displayed).
• The auto light switch on indicator (A. EL) is on the display in all modes while the
auto light switch is turned on.
The backlight uses an EL (electro-luminescent) panel that
causes the entire display to glow for easy reading in the
dark. The watch’s auto light switch automatically turns on
the backlight when you angle the watch towards your face.
• The auto light switch must be turned on (indicated by
the auto light switch on indicator) for it to operate.
• See “Backlight Precautions” for other important
information about using the backlight.
To turn on the backlight manually
In any mode, press L to illuminate the display for about
one second.
• The above operation turns on the backlight regardless of
the current auto light switch setting.
Parallel to
ground
More than
40°
Stopwatch
Minutes
Hours
1/100 second
Seconds
The stopwatch lets you measure elapsed time, split times,
and two finishes.
• The display range of the stopwatch is 99 hours, 59
minutes, 59.99 seconds.
• The stopwatch continues to run, restarting from zero
after it reaches its limit, until you stop it.
• The stopwatch measurement operation continues even
if you exit the Stopwatch Mode.
• Exiting the Stopwatch Mode while a split time is frozen
on the display clears the split time and returns to
elapsed time measurement.
• All of the operations in this section are performed in the
Stopwatch Mode, which you enter by pressing C.
Battery
This watch is equipped with a solar cell and a rechargeable battery (secondary
battery) that is charged by the electrical power produced by the solar cell. The
illustration shown below shows how you should position the watch for charging.
Example: Orient the watch so its
face is pointing at a light source.
• The illustration shows how to
position a watch with a resin band.
• Note that charging efficiency
drops when any part of the solar
cell is blocked by clothing, etc.
• Normally, you should try to keep the watch
outside of your sleeve as much as possible.
Charging is significantly reduced if the face is
only partially covered.
Solar cell
3
Operation Guide 2836
Important!
• Storing the watch for long periods in an area where there is no light or wearing it in
such a way that it is blocked from exposure to light can cause rechargeable battery
power to run down. Be sure that the watch is normally exposed to bright light
whenever possible.
• This watch employs a solar cell that converts light into electricity, which charges a
built-in rechargeable battery. Normally, the rechargeable battery should not need
replacement, but after very long use over a number of years, the rechargeable
battery may lose its ability to achieve a full charge. Should you notice problems with
getting the rechargeable battery to a full charge, contact your dealer or CASIO
distributor about having the rechargeable battery replaced.
• The rechargeable battery should be replaced with a CASIO-specified CTL1616
battery only. Other rechargeable batteries can cause damage to the watch.
• All data stored in memory is deleted, and the current time and all other settings
return to their initial factory defaults whenever battery power drops to Level 4 and
when you have the battery replaced.
• Turn on the watch’s Power Saving function and keep it in an area normally exposed
to bright light when storing it for long periods. This helps to keep the rechargeable
battery from going dead.
Battery Power Indicator and Recover Indicator (RECOV)
The battery power indicator on the display shows you the current status of the
rechargeable battery’s power.
Battery Power
Level
Indicator
1
Battery power indicator
2
3
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(Charge Soon Alert)
4
• The flashing indicator at Level 3 tells you that battery power is very low, and
that exposure to bright light for charging is required as soon as possible.
• At Level 4, all functions are disabled and settings return to their initial factory
defaults. Functions are enabled once again after the rechargeable battery is
charged, but you need to set the current time, date, and all other settings after the
battery is recharged to Level 2 from Level 4. Though the time appears on the display
after the battery is charged to Level 3, you will not be able to change the time setting
until the battery reaches Level 2.
• Leaving the watch in direct sunlight or some other very strong light source can
cause the battery power indicator to temporarily show a reading that is higher than
the actual battery level. The correct battery power indicator should appear after a
few minutes.
• If you use the backlight or any of the alarm functions a number of times during a
short period, RECOV appears on the display and the following operations become
disabled until battery power recovers.
Backlight
Beeper tone
After some time, battery power will recover and RECOV will disappear, indicating
that the above functions are enabled again.
Charging Precautions
Certain charging conditions can cause the watch to become very hot. Avoid leaving
the watch in the areas described below whenever charging its rechargeable battery.
Also note that allowing the watch to become very hot can cause its liquid crystal
display to black out. The appearance of the LCD should become normal again when
the watch returns to a lower temperature.
Warning!
Leaving the watch in bright light to charge its rechargeable battery can cause it
to become quite hot. Take care when handling the watch to avoid burn injury.
The watch can become particularly hot when exposed to the following
conditions for long periods.
• On the dashboard of a car parked in direct sunlight
• Too close to an incandescent lamp
• Under direct sunlight
Charging Guide
After a full charge, timekeeping remains enabled for up to about 11 months.
• The following table shows the amount of time the watch needs to be exposed to light
each day in order to generate enough power for normal daily operations.
Exposure Level (Brightness)
Outdoor Sunlight (50,000 lux)
Sunlight Through a Window (10,000 lux)
Daylight Through a Window on a Cloudy Day
(5,000 lux)
Indoor Fluorescent Lighting (500 lux)
• Since these are the specs, we can include all the technical details.
• Watch is not exposed to light
• Internal timekeeping
• Display on 18 hours per day, sleep state 6 hours per day
• 1 backlight operation (1.5 seconds) per day
• 10 seconds of alarm operation per day
• 1 countdown timer operation per day
• Stable operation is promoted by frequent charging.
Recovery Times
The table below shows the amount exposure that is required to take the battery from
one level to the next.
Exposure Level
(Brightness)
Outdoor Sunlight (50,000 lux)
Sunlight Through a Window
(10,000 lux)
Daylight Through a Window
on a Cloudy Day (5,000 lux)
Indoor Fluorescent Lighting
(500 lux)
Approximate Exposure Time
Level 4 Level 3 Level 2 Level 1
2 hours
7 hours
12 hours
140 hours
Function Status
All functions enabled.
All functions enabled.
Beeper tone, backlight,
display, and buttons are
disabled.
All functions, including
timekeeping, are disabled.
Approximate Exposure Time
5 minutes
24 minutes
48 minutes
8 hours
29 hours
144 hours
293 hours
▲
8 hours
40 hours
81 hours
▲
– – –
• The above exposure time values are all for reference only. Actual required exposure
times depend on lighting conditions.
Reference
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.
Power Saving Function
To recover from the sleep state
Perform any one of the following operations.
• Move the watch to a well-lit area. It can take up to five seconds for the display to turn
on.
• Press any button.
• Angle the watch towards your face for reading.
To turn Power Saving on and off
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Moon Phase Indicator
The Moon phase indicator of this watch indicates the current phase of the Moon as
shown below.
Moon Phase
Indicator
Moon Age
Moon Phase
• 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.
Moon Phases and Moon Age
The Moon goes through a regular 29.53-day cycle during which it appears to wax and
wane due to how the Sun illuminates the Moon and the relative positioning of the
Earth, Moon, and Sun. 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
*
Earth.
This watch perform a rough calculation of the current Moon age starting from day 0 of
the moon age cycle. The actual Moon age average cycle is 29.53 days, but this can
vary anywhere from –1 day to +1 day for specific months. Since this performs
calculations using integer values only (no fractions), the margin for error of the
displayed Moon age is ±2 days.
Tide Graph
The black bar on the watch’s tide graph indicates the current tide.
Tidal Movements
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.
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.
Auto Return Feature
If you leave a screen with flashing digits on the display for two or three minutes without
performing any operation, the watch automatically saves any settings you have made
▲
up to that point and exits the setting screen.
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.
When turned on, the Power Saving function automatically
puts the watch into a sleep state whenever it is left in an
area where it is dark for 30 to 35 minutes. The sleep state
is indicated by a blank screen with SLEEP flashing on it.
In the sleep state, all functions are enabled, except for the
display.
• Wearing watch inside the sleeve of clothing can cause it
to enter the sleep state.
1. In the Timekeeping Mode, hold down A until the
seconds start to flash, which indicates the setting
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screen.
2. Press C seven times until the Power Saving on/off
screen appears.
3. Press D to toggle Power Saving on (ON) and off
(OFF).
4. Press A twice to exit the setting screen.
• The Power Saving on indicator (SAVE) is on the display
in all modes while the Power Saving is turned on.
(part you cannot see)
Moon phase (part you can see)
0, 1, 29 2 - 5 6 - 9 10 - 13 14 - 16 17 - 20 21 - 24 25 - 28
New
Moon
First
Quarter
(Waxing)
High
tide
Low
tide
Full
Moon
Last
Quarter
(Waning)
4
Operation Guide 2836
Timekeeping
• Resetting the seconds to 00 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
reset to 00 without changing the minutes.
• With the 12-hour format, the P (PM) indicator appears on the display for times in the
range of noon to 11:59 p.m. and no indicator appears for times in the range of
midnight to 11:59 a.m.
• With the 24-hour format, times are displayed in the range of 0:00 to 23:59, without
any indicator.
• The year can be set in the range of 2000 to 2039.
• The watch’s built-in full automatic calendar automatically makes allowances for
different month lengths and leap years. Once you set the date, there should be no
reason to change it except when battery power drops to Level 4.
Backlight Precautions
• The electro-luminescent panel that provides illumination loses power after very long
use.
• The illumination provided by the backlight may be hard to see when viewed under
direct sunlight.
• The watch may emit an audible sound whenever the display is illuminated. This is
due to vibration of the EL panel used for illumination, and does not indicate
malfunction.
• The backlight automatically turns off whenever an alarm sounds.
• Frequent use of the backlight runs down the battery.
Auto light switch precautions
• Wearing the watch on the inside of your wrist and movement or vibration of your arm
can cause the auto light switch to activate and illuminate the display. To avoid
running down the battery, turn off the auto light switch whenever engaging in
activities that might cause frequent illumination of the display.
• Note that wearing the watch under your sleeve while the auto light switch is turned
on can cause frequent illumination of the display and can run down the battery.
More than 15 degrees
too high
• Under certain conditions, the backlight may not light until about one second after you
turn the face of the watch towards you. This does not necessarily indicate
malfunction of the backlight.
• You may notice a very faint clicking sound coming from the watch when it is shaken
back and forth. This sound is caused by mechanical operation of the auto light
switch, and does not indicate a problem with the watch.
Site/Lunitidal Interval Data List
Site Standard DST/ Longitude
Anchorage –9.0 –8.0 149°W 5:40
Bahamas –5.0 –4.0 77°W 7:30
Baja, California –7.0 –6.0 110°W 8:40
Bangkok +7.0 +8.0 101°E 4:40
Boston –5.0 –4.0 71°W 11:20
Buenos Aires –3.0 –2.0 58°W 6:00
Casablanca +0.0 +1.0 8°W 1:30
Christmas Island +14.0 +15.0 158°W 4:00
Dakar +0.0 +1.0 17°W 7:40
Gold Coast +10.0 +11.0 154°E 8:30
Great Barrier Reef, Cairns +10.0 +11.0 146°E 9:40
Guam +10.0 +11.0 145°E 7:40
Hamburg +1.0 +2.0 10°E 4:50
Hong Kong +8.0 +9.0 114°E 9:10
Honolulu –10.0 –9.0 158°W 3:40
Jakarta +7.0 +8.0 107°E 0:00
Jeddah +3.0 +4.0 39°E 6:30
Karachi +5.0 +6.0 67°E 10:10
Kona, Hawaii –10.0 –9.0 156°W 4:00
Lima –5.0 –4.0 77°W 5:20
Lisbon +0.0 +1.0 9°W 2:00
London +0.0 +1.0 0°E 1:10
Los Angeles –8.0 –7.0 118°W 9:20
Maldives +5.0 +6.0 74°E 0:10
Manila +8.0 +9.0 121°E 10:30
Mauritius +4.0 +5.0 57°E 0:50
Melbourne +10.0 +11.0 145°E 2:10
Miami –5.0 –4.0 80°W 7:30
Noumea +11.0 +12.0 166°E 8:30
Pago Pago –11.0 –10.0 171°W 6:40
Palau +9.0 +10.0 135°E 7:30
Panama City –5.0 –4.0 80°W 3:00
Papeete –10.0 –9.0 150°W 0:10
Rio De Janeiro –3.0 –2.0 43°W 3:10
Seattle –8.0 –7.0 122°W 4:20
Shanghai +8.0 +9.0 121°E 1:20
Singapore +8.0 +9.0 104°E 10:20
Sydney +10.0 +11.0 151°E 8:40
Tokyo +9.0 +10.0 140°E 5:20
Vancouver –8.0 –7.0 123°W 5:10
Wellington +12.0 +13.0 175°E 4:50
*Based on data as of 2003.
• The backlight may not light if the face of the watch is
more than 15 degrees above or below parallel. Make
sure that the back of your hand is parallel to the ground.
• The backlight turns off in about one second, even if you
keep the watch pointed towards your face.
• Static electricity or magnetic force can interfere with
proper operation of the auto light switch. If the backlight
does not light, try moving the watch back to the starting
position (parallel with the ground) and then tilt it back
towards you again. If this does not work, drop your arm
all the way down so it hangs at your side, and then bring
it back up again.
GMT Differential
Time Summer Time
Lunitidal
Interval
5
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