Casio MO0401-EC User manual

Operation Guide 2463
1
MO0401-EC
About This Manual
•Button operations are indicated using the
letters shown in the illustration.
•This watch is equipped with two color LCD
panels. For the sake of simplicity, the screen
shots in this manual are shown using only one
color.
•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.
Warning!
•The longitude, latitude, 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.
General Guide
•The illustration below shows which buttons you need to press to navigate
between modes.
Site Time Mode Timekeeping Mode
Moon/Tide Data Mode Sunrise/Sunset Mode
Stopwatch Mode Countdown Timer
Mode
▲
▲
Press B.
▲
▲
Alarm Mode
▲
Press C.
Press C.
▲
▲
▲
C
Timekeeping
Use the Timekeeping Mode to set and view the current time and date.You can
also select the Timekeeping Mode display format (Time – Date or Time – Tide
Graph) and display the color pattern you want to use.
•In the Timekeeping Mode, press Dto toggle between the Time – Date and
the Time – Tide Graph screens.
Time – Date Time – Tide Graph
▲
▲
Press D.
PM indicator Year Month –Day
Hour : Minutes Seconds
Day of week
Tide graph
Moon phase indicator
•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 for the currently
selected time zone, in accordance with the current date as kept in the
Timekeeping Mode.
Important!
•Moon phase, tide graph data, Site Time Mode times, and Sunrise/Sunset
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.
•Always use standard time when setting the Timekeeping Mode time and
date, even if the area where your Home Site is located is currently in
Daylight Saving Time (summer time). After setting the time, turn DST on or
off as required. See “Daylight Saving Time (DST)”for more information.
To set the time and date
1. In the Timekeeping Mode, hold down Auntil
the seconds start to flash, which indicates the
setting screen.
2. Press Cto move the flashing in the sequence
shown below to select other settings.
Hour
Seconds
Day
Minutes 12/24-Hour
Format
Year
Month
To change this setting Perform this button operation
Seconds Press Dto reset to 00.
Hour, Minutes, Year, Use D(+) and B(–) to change the setting.
Month, Day
12/24-Hour Format Press Dto toggle between 12-hour (12H)
and 24-hour (24H) timekeeping.
•Pressing Dwhile the seconds are in the range of 30 to 59 resets them
to 00 and adds 1 to the minutes. In the range of 00 to 29, the minutes
are unchanged.
4. Press Athree times to exit the setting screen.
•Each press of Ain the above step cycles through screens in the
following sequence: DST on/off setting screen →Longitude/Latitude
setting screen →Timekeeping Mode 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.
Daylight Saving Time (DST)
Daylight Saving Time (summer time) advances the 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 time between DST and Standard Time
1. In the Timekeeping Mode, hold down Auntil
the seconds start to flash, which indicates the
setting screen.
2. Press Aagain to move the flashing to the
DST On/Off setting.
3. Press Dto toggle between Daylight Saving
Time (ON displayed) and standard time
(OFF displayed).
4. Press Atwice to exit the setting screen.
•The DST indicator appears on the display to
indicate that daylight saving time is turned
on.
3. When the setting you want to change is flashing, use Dand Bto
change it as described below.
Home Site Data
Moon phase, tide graph data, Site Time Mode times, and Sunrise/Sunset
Mode data will not be displayed properly unless Home Site data (DST On/Off,
Home Site name, GMT differential, Longitude/Latitude, and lunitidal interval)
is configured correctly.
•The initial factory default setting for the Home Site data is TORAMI
(Chiba, Japan). This setting is restored whenever you have the watch’s
battery replaced. Change this setting to match the area where you normally
use the watch.

Operation Guide 2463
2
•The GMT differential is the time difference of the time zone where the site is
located from Greenwich Mean Time.
•The lunitidal interval is the time elapsing between the Moon’s transit over
the meridian and the next high tide. 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, latitude, and lunitidal interval information around the world.
To configure Home Site data
1. In the Timekeeping Mode, hold down Auntil
the seconds start to flash, which indicates the
setting screen.
•To exit the setting screen at any point, press
Aa number of times until the Time – Date
screen or Time – Tide graph screen
appears. Exiting the setting screen saves
any settings you have configured up to that
point.
2. Press Aagain to move the flashing to the
DST On/Off setting.
•Pressing Cmoves the flashing between
the settings in the sequence shown below.
DST On/Off GMT differential Site name
DST on/off status
GMT differential
•The Site name field has spaces for eight characters, so you must press
Cto move the flashing goes past the 8th character in order to get to the
DST On/Off setting.
3. Press Cto move the flashing to the DST On/Off setting.
4. Press Dto toggle the Daylight Saving Time (ON) and standard time
(OFF).
5. Press Cto move the flashing to the GMT differential setting, and then use
D(+) and B(–) to change it.
6. Press Cto move the flashing to the first
character of the site name.
7. Input the site name you want.
•Use Dand Bto cycle through characters
at the current input position in the sequence
shown below.
.
Press D.Press B.
(space)
0 to 9
A to Z
_
/
Site name
•When the character you want is shown, press Cto move the flashing to
the right and input the next character.
•To delete a character, input a space.
•You can input up to eight characters. Inputting eight characters causes
the flashing to return to the DST On/Off setting. If your site name has
fewer than eight characters, you must press Cto skip past all the
unused spaces in order to move the flashing to the DST On/Off setting.
8. After the DST On/Off, GMT differential, and site name settings are the way
you want, press Aand the Longitude/Latitude setting starts to flash on
the display.
•Pressing Cmoves the flashing between the settings in the sequence
shown below.
Longitude/Latitude Hours Minutes
Lunitidal Interval
9. Press Cto move the flashing to the
Longitude/Latitude setting, and then change it.
•Press Dto change the longitude value and
Bto change the latitude.
•To reverse the direction of the change (from
increase to decrease, or from decrease to
increase), press L.
•You can specify longitude in the range of
179°W to 180°E, and latitude from 65°N to
65°S, both in 1-degree units.
10. Press Cto move the flashing to the lunitidal
interval hour setting, and then use D(+) and
B(–) to change it.
11. Press Cto move the flashing to the lunitidal
interval minute setting, and then use D(+)
and B(–) to change it.
12. Press Ato exit the setting screen.
Latitude
Longitude
Lunitidal interval
(Hours : Minutes)
Color Pattern Setting
You can select one of two different color patterns.
•The color pattern you select is reflected in the Timekeeping, Moon/Tide
Data, and Sunrise/Sunset Modes.
•Available color patterns differ according to model.
To change the color pattern setting
1. In the Timekeeping Mode, hold down Auntil the seconds start to flash,
which indicates the setting screen.
2. Each press of Ltoggles between the two color patterns shown below.
3. Press Athree times to exit the setting screen.
▲
▲
Site Time
You can use the Site Time Mode to view the
current time for Home Site and any one of 9
different sites.
•The watch comes pre-programmed with site
data (site name, GMT differential, longitude/
latitude, and lunitidal interval) for famous
surfing sites around the world. You can use
these presets as they are or change them to
suit your needs.
•See “Pre-programmed Site Data”for more
information about the pre-programmed data.
•All of the operations in this section are
performed in the Site Time Mode, which you
enter by pressing Bwhile in the Timekeeping
Mode.
Home site time
(Timekeeping Mode time)
Site name
Current time in the site of
the selected site name
To view the time in another site
In the Site Time Mode, press Bto scroll forward through the site names.
•The site currently selected for your Home Site appears first whenever you
enter the Site Time Mode.
•If the current time shown for a site is wrong, check your Timekeeping Mode
time and Home Site data, and make the necessary changes.
•If the site name is longer than four characters, it scrolls from right to left on
the display.
•Pressing Bwhile the 10th site name is displayed returns to the
Timekeeping Mode.You can also return to the Timekeeping Mode by
pressing Cat any time in the Site Time Mode.
•The current time in all Site Time Mode sites is calculated in accordance
with the Greenwich Mean Time (GMT) differential for each site, based on
the current Home Site time setting in the Timekeeping Mode.
•GMT differential is calculated by this watch based on Universal Time
Coordinated (UTC) data.
Changing Site Data
Site data consists of the site name, DST (Daylight Saving Time) setting, GMT
differential, longitude and latitude, and lunitidal interval of the site. Changing
site data causes its time to be set automatically in accordance with the GMT
differential.
•Having the watch battery replaced causes all sites to revert to their initial
factory defaults. If you want to use your own site data, you must re-input it
each time you have the battery replaced.
To change site data
1. In the Site Time Mode, press Bto display the
name of the site whose data you want to
change.
2. Hold down Auntil DST On/Off setting starts
to flash, which indicates the setting screen.
GMT differential
•To exit the setting screen at any point, press
Aa number of times until the Site Time
Mode screen appears. Exiting the setting
screen saves any settings you have
configured up to that point.
3. Use the procedure starting from step 4 under
“To configure Home Site data”to change the
site data.

Operation Guide 2463
3
To change the time, date, and site data of your Home Site
1. In the Site Time Mode, display the site name for the site you want to make
your Home Site.
2. Hold down Dfor about two seconds until the watch emits a long beep and
enters the Timekeeping Mode.
Moon/Tide Data
Moon/tide data lets you view the Moon age on any date, and the Moon age,
Moon phase, and tidal movements for a particular date for any of the 10 Site
Time Mode sites.
•If you suspect that the Moon/tide data is not correct for some reason, check
the Home Site time setting and the Home Site data, and make changes as
required.
•All of the operations in this section are performed in the Moon/Tide Data
Mode, which you enter by pressing C.
Moon/Tide Data Screens
The following shows the various data screens that you can view using the
Moon/Tide Data Mode. See the pages indicated for details about viewing
each screen.
•Whenever you enter the Moon/Tide Data Mode, the Calculating screen
appears as the watch calculates Moon and tide data. After about four
seconds, the Moon Age screen appears.
•About two seconds after the Moon Age screen appears, the screen starts
to alternate between the Moon Age screen and the Moon Up/Down screen
at two-second intervals.
AB
CD
Calculating Moon Age Moon Up/Down Tide Data
Date
Site name Moon phase indicator
Tide graph
•Pressing Awhile the Calculating, Moon Age, or Moon Up/Down screen is
on the display changes to the Tide Data screen. Pressing Awhile the Tide
Data screen is on the display displays the Calculating screen.
•The Moon and tide data that appears first when you enter the Moon/Tide
Data Mode is the data for your Home Site.
•You can view other Moon and tide data by specifying a date and/or site
name. Doing so causes the Calculating screen to appear, followed by the
data. In this case, the Calculating screen may remain on the display for up
to 15 seconds as the watch calculates the required data. The Moon Age,
Moon Up/Down, or Tide Data screen appears after data calculation is
complete.
•See “Moon Phase Indicator” for information about the Moon phase indicator
and “Tide Graph” for information about the tide graph.
To view the Moon age and Moon up/down time for a particular date
1. Enter the Moon/Tide Data Mode.
•The Calculating screen appears first,
followed by the Moon Age screen for your
current Home Site date and site data
settings. After that, the display alternates
between the Moon Age screen and Moon
Up/Down screen.
•To view the Moon age and Moon up/down
time for another site, use Dand Bwhile
the Calculating screen is on the display to
scroll through site names.
2. Use D(+) and B(–) to change the date.
•Changing the date causes the Calculating
screen to appear.
•You can select any date from 1995 to 2039.
DateMoon age
Site name
Moon phase indicator
Moon down time
Moon up time
2. Specify the date whose tide data you want to view.
•Use D(+) and B(–) to change the date.
3. Press Ato switch to the Tide Data Screen.
4. Specify the time for which you want to display
tide data.
•Use D(+) and B(–) to change the time in
one-hour steps.
DateTime
Tide graph
Sunrise/Sunset Mode
You can use the Sunrise/Sunset Mode to look
up the sunrise and sunset times for any date at
any of the 10 sites of the Site Time Mode.
•Whenever you enter the Sunrise/Sunset
Mode, a Calculating screen appears as the
watch calculates sunrise and sunset times.
After about four seconds, the sunrise/sunset
time screen appears.
•All of the operations in this section are
performed in the Sunrise/Sunset Mode,
which you enter by pressing C.
Date Moon phase
indicator
To view the sunrise/sunset time for a particular date
1. Enter the Sunrise/Sunset Mode.
•The sunrise and sunset times that appear
first when you enter the Sunrise/Sunset
Mode is the data for the site and date
currently specified in the Moon/Tide Data
Mode.
•While the Calculating screen is on the
display, you can use Dand Bto scroll
through site names until the one whose
sunrise/sunset times you want to view is on
the display.
•After the site name you want is displayed,
do not perform any button operation. The
sunrise/sunset times of the site appear after
calculation is complete.
Sunrise time
Sunset time
Site name
2. While the sunrise/sunset time are on the display, use D(+) and B(–) to
scroll through the dates.
•Pressing Dor Bcauses the Calculating screen to appear.
•After the date you want is displayed, do not perform any button
operation. The sunrise/sunset times of the date appear after calculation
is complete.
Note
•After you change the site name and/or date, it may take up to 15 seconds
before the sunrise/sunset times appear on the display.
•Note that you cannot change the site name while the sunrise/sunset time is
in the display. To change the site name, press Aso the Calculating screen
appears, and then change the site name.
•Sunrise/sunset time is displayed in 5-minute units.
•If you suspect that the sunrise/sunset times are not correct for some
reason, check the Home Site time setting and the Home Site data, and
make changes as required.
•The sunrise and sunset times displayed by this watch are times at sea level.
Sunrise and sunset times are different at altitudes other than sea level.
Changing Your Home Site
Use the Site Time Mode to change the site data of your Home Site when you
travel to another site. Performing this operation automatically changes the
Timekeeping Mode time, date, and site data settings in accordance with the
site name you select.
To view tide data for a particular time
1. Enter the Moon/Tide Data Mode.
•The Calculating screen appears first, followed by the Moon Age screen
for your current Home Site date and site data settings. After that, the
display alternates between the Moon Age screen and Moon Up/Down
screen.
•To view the Moon age and Moon up/down time for another site, use D
and Bwhile the Calculating screen is on the display to scroll through
site names.
•The Moon up time indicates when the Moon
will reach its highest point relative to your
current location (upper transit), while the
Moon down time indicates when it will reach
its lowest point (lower transit). Note that
Moon up and Moon down times are
accurate up to ±30 minutes.

Operation Guide 2463
4
Configuring the Countdown Timer
The following are the settings you should configure before actually using the
countdown timer.
•Countdown start time and progress beeper start time settings
•Auto-repeat on/off
•Progress beeper on/off
Countdown start time
You can set a countdown start time from 1 to 60 minutes, in one-minute
increments.
Progress beeper start time
The progress beeper sounds every minute during the countdown, every 10
seconds during the final minute, and every second during the final five
seconds of the countdown. You can specify the start time of the progress
beeper, and turn progress beeper operation on or off.You can set the
progress beeper start time in 1-minute increments to any value that is not
greater than the countdown start time.
Auto-repeat on/off
Auto-repeat automatically restarts the countdown from the countdown start
time you set whenever zero is reached. Turning off auto-repeat causes the
countdown to stop and the countdown start time to appear on the display
when the end of the countdown is reached.
Countdown Timer Example Operation
•Countdown start time: 15 minutes; Progress beeper start time: 5 minutes;
Auto-repeat: On
•Countdown start time: 15 minutes; Progress beeper: Off; Auto-repeat: Off
15 minutes
Start
0
Time up
(alarm sounds)
5 minutes
(Progress beeper starts.)
Start
15 minutes
Time up
(alarm sounds)
0
To set the countdown start time, progress beeper start time, and
auto-repeat on/off
1. In the Countdown Timer Mode, hold down A
until the minute setting of the countdown start
time starts to flash, which indicates the setting
screen.
2. Press Cto move the flashing in the sequence
shown below to select other settings.
•The SET indicator in the lower display
changes to PRE when you switch from the
minutes setting screen to the progress
beeper start time setting screen.
3. Set the countdown timer to the start time you
want.
Auto
Repeat
Minutes Beeper
Start Time
Auto-repeat indicator
•While the countdown start time minutes setting or progress beeper start
time setting is flashing, use D(+) or B(–) to change it.
•While the auto-repeat setting ( or ) is flashing on the display,
press Dto toggle auto-repeat on ( ) and off ( ).
4. Press Ato exit the setting screen.
•The backgrounds of the upper part and lower
part of the display flash during the final minute
of the countdown.
•When the countdown reaches zero, the alarm
sounds for 10 seconds or until you stop it by
pressing any button.
•Press Lwhile a countdown operation is in
progress to pause it. Press Lagain to resume
the countdown.
•To completely stop a countdown operation, first
pause it (by pressing L), and then press B.
This returns the countdown time to its starting
value.
Flashing
Flashing
Stopwatch
The stopwatch lets you measure elapsed time,
split times, and two finishes. It also includes Auto-
Start.
•The display range of the stopwatch is 23 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.
•Each press of Awhile the Stopwatch Mode
display shows any time other than all zeros
toggles the upper part of the display between
the stopwatch time and the Timekeeping Mode
time.
•All of the operations in this section are
performed in the Stopwatch Mode, which you
enter by pressing C.
Timekeeping Mode time
Seconds
1/100 second
Minutes
Hours
First runner
finishes.
Display time
of first runner.
Display time of
second runner.
To measure times with the stopwatch
Elapsed Time
LL L L B
Start Stop Re-start Stop Clear
Split Time
LB B L B
Start Split Split release Stop Clear
(SPL displayed)
Two Finishes
LB L B B
Start Split Stop Split release Clear
Second runner
finishes.
J J J J
J J J J
J J J J
About the Auto-Start function
With Auto-Start, the watch performs a 5-second countdown, and stopwatch
operation starts automatically when the countdown reaches zero.
During the final three seconds of the countdown, a beeper sounds with each
second.
To use the Auto-Start function
1. While the stopwatch display is showing all zeros
(00'00"00) in the Stopwatch Mode, press A.
•This displays a 5-second countdown screen.
•To return to the all zeros screen, press A
again.
2. Press Lto start the countdown.
•When the countdown reaches zero, a tone
sounds and a stopwatch timing operation
starts automatically.
•To stop the Auto-Start countdown and return
to the all-zeros display, press A.
•Pressing Lwhile the Auto-Start countdown is
in progress immediately starts the stopwatch.
To turn the progress beeper on and off
Pressing Bwhile the countdown start time is on
the display or while a countdown timer operation
is in progress in the Countdown Timer Mode
toggles progress beeper operation on (
displayed) and off ( not displayed).
To use the countdown timer
Press Lwhile in the Countdown Timer Mode to
start the countdown timer.
Progress beeper
on indicator
Countdown Timer
The countdown timer can be set within a range of
1 to 60 minutes. An alarm sounds when the
countdown reaches zero. An auto-repeat feature
causes the countdown to restart automatically
when the end of a countdown is reached, 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.
Timekeeping Mode time
1/10 second
Seconds
Minutes

Operation Guide 2463
5
Alarms
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. You can
select either a one-time alarm or snooze alarm.
You can also turn on an Hourly Time Signal that
causes the watch to beep twice every hour on the
hour.
•The alarm number of the display indicates the
alarm type, as described below.
AL1 and AL2: One-time alarm screen
SNZ: Snooze alarm screen
SIG: Hourly Time Signal screen
•Alarm settings (and Hourly Time Signal
settings) are available in the Alarm Mode,
which you enter by pressing C.
Alarm date
(Month –Day)
Alarm number
Alarm time
(Hour : Minutes)
Alarm Types
The alarm type is determined by the settings you make, as described below.
•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.
•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.
•1-Month alarm
Set the month, hour and minutes for the alarm time. This type of setting
causes the alarm to sound everyday at the time you set, only during the
month you set.
•Monthly alarm
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.
To set an alarm time
1. In the Alarm Mode, press Dto scroll through
the alarm screens until the one whose time
you want to set is displayed.
2. After you select an alarm, hold down Auntil
the hour setting of the alarm time starts to
flash, which indicates the setting screen.
•This operation automatically turns on the
alarm.
3. Press Cto move the flashing in the sequence shown below to select
other settings.
4. While a setting is flashing, use D(+) and B(–) to change it.
AL1 AL2 SNZ SIG
Hour Day
Minutes Month
Alarm on indicator
•To set an alarm that does not include a month (Daily alarm, Monthly
alarm), set xx for the month. Use Dand Buntil the xx mark appears
(between 12 and 1) while month setting is flashing.
•To set an alarm that does not include a day (Daily alarm, 1-Month
alarm), set xx for the day. Use Dand Buntil the xx mark appears
(between 31 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. (no indicator) or p.m. (Pindicator).
5. Press Ato exit the setting screen.
Alarm Operation
The backgrounds of the upper and lower part of the display flash starting from
the point the Timekeeping Mode time reaches one hour before an alarm time.
This pre-alarm feature lets you know that an alarm time is about to be
reached. When the actual alarm time is reached, an alarm tone sounds for 20
seconds. In the case of the snooze alarm, the alarm repeats up to seven
times every five minutes until the alarm is turned off.
•Pressing any button stops the pre-alarm operation or the alarm tone operation.
•The pre-alarm feature works in the Timekeeping Mode only.
To test the alarm
In the Alarm Mode, hold down Dto sound the alarm.
To turn the one-time alarm and the Hourly Time Signal on and off
1. In the Alarm Mode, press Dto select a one-time alarm (AL1 or AL2)
or the Hourly Time Signal (SIG).
2. When the alarm or the Hourly Time Signal you want to is selected, press
Bto turn it on and off.
Indicates alarm is on.
Indicates Hourly Time Signal is on.
•The alarm on indicator ( ) and the Hourly Time Signal on indicator ( )
are shown on the display in all modes while these functions are turned
on.
•If any alarm is on, the alarm on indicator is shown on the display when
you change to another mode.
To turn the snooze alarm on and off
1. In the Alarm Mode, press Dto select the snooze alarm (SNZ).
2. Press Bto turn it on ( displayed) and off ( not displayed).
•The snooze alarm on indicator ( ) is shown on the display in all
modes while this function is turned on.
Backlight
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.
Auto light switch on indicator
To turn on the backlight manually
In the Countdown Timer and Stopwatch Modes, pressing Dturns on the
backlight for about two seconds. In any other mode (Timekeeping, Site Time,
Moon/Tide Data, Sunrise/Sunset, and Alarm Modes), pressing Lturns on
the backlight for about two seconds.
•The above operation turns on the backlight regardless of the current auto
light switch setting.
About the Auto Light Switch
Turning on the auto light switch causes the backlight to turn on for about two
seconds, whenever you position your wrist as described below in any mode.
•Be sure to wear the watch on the outside of your left wrist while using the
auto light switch.
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.
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.
Parallel to
ground More than
40°
••
••
•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 Lfor about one second to toggle the
auto light switch on ( displayed) and off ( not displayed).
•The auto light switch on indicator ( ) is on the display in all modes while
the auto light switch is turned on.
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.
Auto Display
Auto Display continually changes the contents of
the digital display.
To turn off Auto Display
Press any button (except for L) to turn off Auto
Display. This returns to the Timekeeping Mode.
To turn on Auto Display
Hold down Cfor about three seconds until the
watch beeps.
•Note that Auto Display cannot be performed
while a setting screen is on the display.

Operation Guide 2463
6
Moon Phase Indicator
The Moon phase indicator of this watch indicates the current phase of the
Moon as shown below.
•The light part of the Moon phase indicator shows the part of the Moon that
is visible in the sky during each particular phase.
Graph
Moon Age 0.0-1.8 1.9-3.6 3.7-5.5 5.6-7.3 7.4-9.2 9.3-11.0 11.1-12.9 13.0-14.7
Moon
Phase
Graph
Moon Age 14.8-16.6 16.7-18.4 18.5-20.3 20.4-22.1 22.2-24.0 24.1-25.8 25.9-27.7 27.8-29.5
Moon
Phase
Full
Moon
Last
Quarter
(Waning)
First
Quarter
(Waxing)
New
Moon
•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.
The Moon age indicates the number of days from the New Moon to any
particular phase. It is normally calculated using either noon or midnight as a
reference point. This watch calculates the Moon age based on the angular
distance of the Moon at noon, which can result in an error of ±1 day. Because
of this, the appearance of the Moon phase indicator may be different from that
of the actual Moon.
The watch uses the following formula to calculate Moon age.
Moon Age (days) = 29.53 ×(Moon angular distance / 360°)
Tide Graph
The Tide Graph screen shows one of three different waveforms to indicate
spring tide, intermediate tide, or neap tide as the current tide pattern. In
addition, the current tide level is indicated within the displayed tide pattern as
a column of flashing dots.
•Spring Tide: Tides occurring at new and full Moons, when the range
between high and low tides is greatest.
•Neap Tide: Tides occurring at first and third Moon quarters, when the
range between high tide and low tide is smallest.
•Intermediate Tide: Indicates tide at the midpoint between spring tide and
neap tide.
High
Middle
Low
Spring Tide Intermediate Tide Neap 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
the 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.
Moon Data
•The Moon up time indicates when the Moon will reach its highest point
relative to your current location (upper transit), while the Moon down time
indicates when it will reach its lowest point (lower transit). The time it takes
to perform once cycle from one Moon up time to the next Moon up time is
the “lunar day.”Due to the relationship between the Earth’s rotation and the
Moon’s orbit, the length of the lunar day is 24 hours and 50 minutes.
Because of this, some days have either a Moon up time only or a Moon
down time only.
•For days around the Full Moon or New Moon, there are days where there is
no Moon up or Moon down. In such case, x:xx is shown for the Moon up
or Moon down time.
•For the Moon age, this watch displays the age of the Moon at noon on the
selected date.
Color Pattern Precaution
Note the following points about the different color patterns used for the
display of this watch.
•Display figures may be difficult to read from some viewing angles.
Auto Return Features
•After you perform any button operation in the Countdown Timer and
Stopwatch Modes, pressing Creturns directly to the Timekeeping Mode.
•If you leave a screen with flashing digits or a character 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.
Data and Setting Scrolling
The Band Dbuttons 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
•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 1995 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 after you have the watch’s battery
replaced.
Alarm
•The pre-alarm operation is not performed at all if its start time (one hour
before the specified alarm time) is reached while the watch is not in the
Timekeeping Mode or while the Timekeeping Mode setting screen is on the
display. In this case, the pre-alarm operation will not start when you enter
the Timekeeping Mode.
•Depending on the type of alarm you are using, the alarm on indicator ( )
or snooze alarm on indicator ( ) flashes on the display while the alarm
is sounding.
•The snooze alarm on indicator (SNZ) flashes during the 5-minute interval
that a snooze alarm is operational.
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 stortens the battery life.
Auto light switch precautions
•The backlight is disabled while the Calculating screen is on the display in
the Moon/Tide Data Mode or Sunrise/Sunset Mode.
•In order to protect against running down the battery, the auto light switch
automatically turns off approximately six hours after you turn it on.
•Avoid wearing the watch on the inside of your wrist. Doing so causes the
auto light switch to operate when it is not needed, which shortens battery
life. If you want to wear the watch on the inside of your wrist, turn off the
auto light switch feature.
•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 two seconds,
even if you keep the watch pointed towards
your face.
More than 15 degrees
too high
•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 toward
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.
•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.

Operation Guide 2463
7
Pre–programmed Site Data
Display Name Site Name Location
TORAMI Torami Beach Chiba, Japan
BELL BCH Bell’s Beach Melbourne, Australia
S.S BCH Sunset Beach Oahu, Hawaii
TAHITI Teahupoo Tahiti
HUNTNGTN Huntington Beach Los Angeles, U.S.A.
RIO Rio De Janeiro Rio De Janeiro, Brazil
FIGUEIRA Figueira West coast of Portugal
MUNDAKA Mundaka Mundaka, Spain
SW COAST South West Coast France
JEFFREY Jeffrey’s Bay South Africa
•
Based on data as of June 2001.
Pre–progammed Site Data
Longitude Latitude GMT differential Lunitidal Interval
140°E35°N 9 4:50
145°E38°S 10 2:10
158°W22°N –10 3:00
149°W18°S –10 0:20
118°W34°N –8 9:20
43°W23°S –3 3:00
9°W40°N 0 2:10
3°W43°N 1 3:00
1°W44°N 1 3:10
25°E34°S 2 3:10
Site Data List
Site GMT Differential Longitude Latitude
ABIDJAN 0.0 4°W5°N
ABU DHABI 4.0 54°E24°N
ADDIS ABABA 3.0 39°E9°N
ADEN 3.0 45°E13°N
AMSTERDAM 1.0 5°E52°N
ANCHORAGE –9.0 149°W61°N
ATHENS 2.0 24°E38°N
AZORES –1.0 25°W38°N
BANGKOK 7.0 101°E14°N
BEIJING 8.0 116°E40°N
BEIRUT 2.0 36°E34°N
BOGOTA –5.0 74°W5°N
BOSTON –5.0 71°W42°N
BRASILIA –3.0 48°W16°S
BUENOS AIRES –3.0 58°W35°S
CAPE TOWN 2.0 18°E34°S
CARACAS –4.0 67°W11°N
CASABLANCA 0.0 8°W34°N
CHICAGO –6.0 88°W42°N
CHRISTCHURCH 12.0 173°E44°S
DAKAR 0.0 17°W15°N
DALLAS/ –6.0 97°W33°N
FORT WORTH
DAMASCUS 2.0 36°E34°N
DENVER –7.0 105°W40°N
DETROIT –5.0 83°W42°N
DHAKA 6.0 90°E24°N
DUBAI 4.0 55°E25°N
DUBLIN 0.0 6°W53°N
EDMONTON –7.0 114°W54°N
EL PASO –7.0 106°W32°N
FRANKFURT 1.0 9°E50°N
GOLD COAST 10.0 154°E28°S
GUAM 10.0 145°E13°N
HAMBURG 1.0 10°E54°N
HANOI 7.0 106°E21°N
HELSINKI 2.0 25°E60°N
HONG KONG 8.0 114°E22°N
HONOLULU –10.0 158°W21°N
HOUSTON –6.0 95°W30°N
ISTANBUL 2.0 29°E41°N
JAKARTA 7.0 107°E6°S
JEDDAH 3.0 39°E22°N
KARACHI 5.0 67°E25°N
KUALA LUMPUR 8.0 102°E3°N
KUWAIT 3.0 48°E29°N
LA PAZ –4.0 68°W17°S
LAS VEGAS –8.0 115°W36°N
LIMA –5.0 77°W12°S
LISBON 0.0 9°W39°N
LONDON 0.0 0°E52°N
LOS ANGELES –8.0 118°W34°N
MADRID 1.0 4°W40°N
MANILA 8.0 121°E15°N
MELBOURNE 10.0 145°E38°S
MEXICO CITY –6.0 99°W19°N
MIAMI –5.0 80°W26°N
MILAN 1.0 9°E45°N
MONTEVIDEO –3.0 56°W35°S
MONTREAL –5.0 74°W46°N
MUSCAT 4.0 59°E24°N
NADI 12.0 177°E18°S
NAIROBI 3.0 37°E1°S
NAURU ISLAND 12.0 167°E1°S
NEW ORLEANS –6.0 90°W30°N
NEW YORK –5.0 74°W41°N
NOME –9.0 165°W64°N
NOUMEA 11.0 166°E22°S
Site GMT Differential Longitude Latitude
PAGO PAGO –11.0 171°W14°N
PANAMA CITY –5.0 80°W9°N
PAPEETE –10.0 150°W18°S
PARIS 1.0 2°E49°N
PERTH 8.0 116°E32°S
PHNOM PENH 7.0 105°E12°N
PORT OF SPAIN –4.0 62°W11°N
PORT VILA 11.0 168°E18°S
PRAIA –1.0 24°W15°N
PYONGYANG 9.0 126°E39°N
RIYADH 3.0 47°E25°N
ROME 1.0 13°E42°N
SAN FRANCISCO –8.0 122°W38°N
SANTIAGO –4.0 71°W33°S
SAO PAULO –3.0 47°W24°S
SEATTLE –8.0 122°W48°N
SEOUL 9.0 127°E38°N
SHANGHAI 8.0 121°E31°N
SINGAPORE 8.0 104°E1°N
STOCKHOLM 1.0 18°E59°N
SYDNEY 10.0 151°E34°S
TAIPEI 8.0 121°E25°N
TOKYO 9.0 140°E36°N
ULAANBAATAR 8.0 107°E48°N
VANCOUVER –8.0 123°W49°N
VIENNA 1.0 16°E48°N
VIENTIANE 7.0 103°E18°N
WELLINGTON 12.0 175°E41°S
WINNIPEG –6.0 97°W50°N
•
Based on data as of 2003.
Lunitidal Interval List
Site Lunitidal
Interval
ANCHORAGE 5:40
BANGKOK 4:40
BOSTON 11:20
BUENOS AIRES 6:00
CASABLANCA 1:30
DAKAR 7:40
GOLD COAST 8:30
HAMBURG 4:50
HONG KONG 9:10
HONOLULU 3:40
JAKARTA 0:00
JEDDAH 6:30
KARACHI 10:10
LIMA 5:20
LISBON 2:00
Site Lunitidal
Interval
LONDON 1:10
LOS ANGELES 9:20
MANILA 10:30
MELBOURNE 2:10
MIAMI 7:30
NOUMEA 8:30
PAGO PAGO 6:40
PANAMA CITY 3:00
PAPEETE 0:10
SEATTLE 4:20
SHANGHAI 1:20
SINGAPORE 10:20
SYDNEY 8:40
VANCOUVER 5:10
WELLINGTON 4:50
• Based on data as of June 2001.