Casio 3088 User Manual
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Longitude (East/West)
DST indicator

MO0711-EB

Operation Guide 3088

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.

Warning!

The measurement functions built into this watch are not intended for use in taking measurements that require professional or industrial precision. Values produced by this watch should be considered as reasonably accurate representations only.

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.

General Guide

Press Cto change from mode to mode.

In any mode (except when a setting screen is on the display), press Bto illuminate the display.

Timekeeping Mode

Press C.

Timekeeping

Tide graph

Month – Day

Day of week

PM indicator

Moon phase

indicator

Hour : Minutes Seconds

Use the Timekeeping Mode to set and view the current 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!

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.

Setting the Time and Date

This watch is preset with UTC differential values that represent each time zone around the globe. Before setting the time, be sure to set the UTC differential for your Home Site first, which is the location where you normally will be using the watch.

Note that World Time Mode times are all displayed based on the time and date settings you configure in the Timekeeping Mode.

To set the time and date

 

 

 

 

1. In the Timekeeping Mode, hold down Auntil the

 

 

 

 

seconds start to flash, which indicates the setting

 

 

 

 

screen.

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Be sure to configure the correct UTC differential for

your Home Site before configuring any other

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Timekeeping Mode settings.

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See the “UTC Differential/City Code List” for

Seconds

information about the UTC differential settings that are

 

 

 

 

supported.

2.Press C to move the flashing in the sequence shown below to select other settings.

 

 

Seconds

 

 

DST

 

 

UTC

 

 

 

Hour

 

 

Minutes

 

 

 

 

 

 

 

 

 

 

 

Differential

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Flash Alert

 

 

Day

 

 

Month

 

 

Year

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

Screen:

To do this:

Do this:

 

Reset the seconds to 00

Press D.

 

 

 

 

Toggle between Daylight Saving

Press D.

 

Time (ON) and Standard Time

 

 

(OFF)

 

 

Specify the UTC differential

Use D(+) and B(–).

 

 

 

 

Change the hour or minutes

Use D(+) and B(–).

 

 

 

 

Change the year, month or day

Use D(+) and B(–).

 

 

 

See “Daylight Saving Time (DST) Setting” below for details about the DST setting.

The UTC differential setting range is –12.0to +14.0, in0.5-hourunits.

When DST is turned on, the UTC differential setting range is –11.0to +15.0, in0.5-hourunits.

For information about Flash Alert, see “Flash Alert”.

4.Press A twice to exit the setting screen.

The day of the week is displayed automatically in accordance with the date (year, month, and day) settings.

About This Manual

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.

 

World Time Mode

Tide/Moon Data Mode

 

 

 

Alarm Mode

Countdown Timer

 

Mode

 

Stopwatch Mode

 

 

 

To toggle between 12-hourand24-hourtimekeeping

In the Timekeeping Mode, press Dto toggle between 12-hourtimekeeping and 24hour timekeeping.

With the 12-hourformat, theP (PM) indicator appears to the left of the hour digits for times in the range of noon to 11:59 p.m. and no indicator appears to the left of the hour digits for times in the range of midnight to 11:59 a.m.

With the 24-hourformat, times are displayed in the range of 0:00 to 23:59, without any indicator.

The 12-hour/24-hourtimekeeping format you select in the Timekeeping Mode is applied in all other modes.

Daylight Saving Time (DST) Setting

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

On/Off status

1.In the Timekeeping Mode, hold down Auntil the

seconds start to flash, which indicates the setting

 

 

 

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screen.

 

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2. Press C once and the DST setting screen appears.

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3. Press D to toggle between Daylight Saving Time (ON

 

 

 

displayed) and Standard Time (OFF displayed). 4. Press A twice to exit the setting screen.

The DST indicator appears on the Timekeeping, Tide/ Moon Data, and Alarm Mode screens to indicate that Daylight Saving Time is turned on. In the case of the

Tide/Moon Data Mode, the DST indicator appears on the Tide Data screen only.

Home Site Data

Moon phase, tide graph data, and Tide/Moon Data Mode data will not be displayed properly unless Home Site data (UTC differential, longitude and lunitidal interval) is configured correctly.

The UTC differential indicates the time differential with Greenwich, England.

The letters UTC is the abbreviation for Coordinated Universal Time, which is the world-widescientific 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” provides UTC differential and longitude information around the world.

The following is the initial factory default Home Site data (Tokyo, Japan) when you first purchase the watch and whenever you have the battery replaced. Change these settings to match the area where you normally use the watch.

UTC differential (+9.0); Longitude (East 140 degrees); Lunitidal interval (5 hours, 20 minutes)

To configure Home Site data

1. In the Timekeeping Mode, hold down Auntil the seconds start to flash, which indicates the setting screen.

 

 

 

 

 

 

 

 

 

 

2. Press C twice to display the UTC differential setting

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screen, and confirm that the setting is correct.

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If the UTC differential setting is not correct, use D (+)

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and B(–)to change it.

 

 

 

 

 

 

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3. Press Ato display the longitude value setting screen.

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

 

 

 

 

 

 

 

 

 

 

Longitude value

 

 

below to select other settings.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Longitude

 

 

Longitude

 

 

Lunitidal Interval

 

 

Lunitidal Interval

 

 

 

 

 

Value

 

 

(East/West)

 

 

Hours

 

 

Minutes

 

1

DST indicator

Operation Guide 3088

5.While the setting you want to change is flashing, use Dand Bto change it as described below.

Setting

Screen

Longitude Value

 

Longitude

 

(East/West)

 

Lunitidal Interval

 

Hours, Minutes

 

Button Operations

Use D (+) and B(–)to change the setting.

You can specify a value from 0° to 180°, in 1- degree units.

Use D to switch between east longitude () and west longitude ().

Use D (+) and B(–)to change the setting.

6. Press A to exit the setting screen.

Tide/Moon Data

Month – Day

Tide graph

Time

Moon phase indicator

Tide/Moon data lets you view the Moon age and the Moon phase for a particular date, and tidal movements for a particular date and time for your Home Site.

When you enter the Tide/Moon Data Mode, the data for 6:00 a.m. on the current date appears first.

If you suspect that the Tide/Moon 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 Tide/Moon Data Mode, which you enter by pressing C.

Tide/Moon Data Screens

In the Tide/Moon Data Mode, press A to toggle between the Tide Data screen and the Moon Data screen.

Tide Data Screen

Moon Data Screen

 

Month – Day

Moon phase indicator

 

 

Press A.

 

Tide graph

Time

Moon age

While the Tide Data screen is displayed, press Dto advance to the next hour.

While the Moon Data screen is displayed, press Dto advance to the next day.

You also can specify a particular date (year, month, day) to view its tide data and Moon data. See “To specify a date” for more information.

When you enter the Tide/Moon Data Mode, the screen (tide data or Moon data) that was displayed the last time you exited the mode appears first.

To specify a date

Year

 

 

Month – Day

1. In the Tide/Moon Data Mode, hold down Auntil the

 

 

year setting starts to flash, which indicates the setting

 

 

 

 

 

 

 

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screen.

 

 

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

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below to select the other settings.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Year

Month

Day

3.While a setting is flashing, use D(+) or B (–)to change it.

You can specify a date in the range of January 1, 2000 to December 31, 2099.

4.Press A to exit the setting screen.

5.Use Ato display either the Tide Data screen or the Moon Data screen.

World Time

City code

Current time in selected city

World Time shows the current time in 48 cities (29 time zones) around the world.

The times kept in the World Time Mode are synchronized with the time being kept in the Timekeeping Mode. If you feel that there is an error in any World Time Mode time, check the UTC differential of your Home Site Data (Home City) and the current setting of the Timekeeping Mode time.

Select a city code in the World Time Mode to display the current time in any particular time zone around the globe. See the “UTC Differential/City Code List” for information about the UTC differential settings that are supported.

All of the operations in this section are performed in the World Time Mode, which you enter by pressing C.

To view the time in another city

While in the World Time Mode, press Dto scroll eastwardly through the city codes (time zones).

To toggle a city code time between Standard Time and Daylight Saving Time

1. In the World Time Mode, use Dto display the city code (time zone) whose Standard Time/Daylight Saving Time

setting you want to change.

2. Hold down Ato toggle between Daylight Saving Time

(DST indicator displayed) and Standard Time (DST

indicator not displayed).

The DST indicator is shown on the World Time Mode screen while Daylight Saving Time is turned on.

Note that changing the Daylight Saving Time for any city code causes the setting to be applied to all city codes.

Stopwatch

1/100 second

Hours Seconds

Minutes

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.

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.

To measure times with the stopwatch

 

 

Elapsed Time

 

 

 

 

D

D

D

D

A

Start

Stop

Re-start

Stop

Clear

Split Time

 

 

 

 

D

A

A

D

A

Start

Split

Split release

Stop

Clear

 

(SPL displayed)

 

 

 

Two Finishes

 

 

 

 

D

A

D

A

A

Start

Split

Stop

Split release

Clear

 

First runner

Second runner

Display time of

 

 

finishes.

finishes.

second runner.

 

 

Display time of

 

 

 

 

first runner.

 

 

 

About Auto-Start

With Auto-Start,the watch performs a5-secondcountdown, 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 Auto-Start

1. While the stopwatch screen is showing all zeros in the Stopwatch Mode, press A.

This displays a5-secondcountdown screen.

To return to the all zeros screen, press A again.

2. Press Dto start the countdown.

When the countdown reaches zero, a tone sounds and a stopwatch timing operation starts automatically.

Pressing D while the Auto-Startcountdown is in progress will start the stopwatch immediately.

Countdown Timer

Hours Seconds

Minutes

Auto-repeat

You can set the countdown timer within a range of one minute to 24 hours. An alarm sounds when the countdown reaches zero. The countdown timer also has an auto-repeatfeature and a progress beeper that signals the progress of the countdown.

All of the operations in this section are performed in the Countdown Timer Mode, which you enter by pressing C.

Configuring the Countdown Timer

The following are the settings you should configure before actually using the countdown timer.

Countdown start time; Auto-repeaton/off; Progress beeper on/off

See “To configure the countdown timer” for information about setting up the timer.

When auto-repeatis turned on, the countdown restarts automatically from the countdown start time when it reaches zero. If left running, the countdown is repeated a total of eight times, after which it stops automatically.

When auto-repeatis turned off, the countdown stops when it reaches zero and the display shows the original countdown start time.

Pressing Dwhile an auto-repeatcountdown is in progress pauses the current countdown. You can resume theauto-repeatcountdown by pressing D, or you can press A to reset to the countdown time starting value.

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 countdown end beeper lets you know when the countdown reaches zero.

When the progress beeper is turned off, the countdown end beeper sounds for about 10 seconds, or until you press any button to stop it.

When the progress beeper is turned on, the countdown end beeper sounds for about one second.

Progress Beeper

When the progress beeper is turned on, the watch uses beeps to signal countdown progress as described below.

Starting from five minutes before the end of the countdown, the watch emits four short beeps at the top of each countdown minute.

30 seconds before the end of the countdown, the watch emits four short beeps.

The watch emits a short beep for each of the last 10 seconds of the countdown.

If the countdown start time is six minutes or greater, the watch emits a short beep for each second of the final 10 seconds before the five-minutepoint is reached. Four short beeps are emitted to signal when thefive-minutepoint is reached.

2

Hourly time signal on indicator
Snooze alarm indicator
Alarm on indicator

Operation Guide 3088

To configure the countdown timer

1. While the countdown start time is on the display in the

 

 

 

 

 

 

Countdown Timer Mode, hold down Auntil the current

 

 

 

 

 

 

countdown start time starts to flash, which indicates the

 

 

 

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setting screen.

 

 

 

 

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If the countdown start time is not displayed, use the

 

 

 

 

 

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procedure under “To use the countdown timer” to

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display it.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2. Press Cto move the flashing in the sequence shown

 

 

 

 

 

 

below to select other settings.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Hours

 

 

Minutes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Progress Beeper

 

 

Auto-repeat

 

 

 

 

 

 

 

 

 

 

 

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

Setting

Screen

 

Button Operation

 

Hours, Minutes

 

Use D(+) and B(–)to change the setting.

 

 

 

 

 

Auto-repeat

 

Press Dto toggle auto-repeaton (

 

 

 

displayed) and off (

displayed).

 

Progress Beeper

 

Press Dto toggle the progress beeper on (

)

 

 

and off (

).

 

 

To specify a countdown start time of 24 hours, set. 4. Press A to exit the setting screen.

You also can perform steps 1 and 2 of the above procedure whenever you need to view the current auto-repeatand progress beeper settings.

To use the countdown timer

Press D while in the Countdown Timer Mode to start the countdown timer.

The countdown timer operation continues even if you exit the Countdown Timer Mode.

Press Dwhile a countdown operation is in progress to pause it. Press Dagain to resume the countdown.

To stop a countdown operation completely, first pause it (by pressing D), and then press A. This returns the countdown time to its starting value.

Alarms

Alarm number Alarm date (Month – Day)

Alarm time (Hour : Minutes)

Alarm Types

You can set up to three independent multi-functionalarms 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 is a snooze alarm, while the other two areone-timealarms.

You also can turn on an Hourly Time Signal that causes the watch to beep twice every hour on the hour.

There are three alarm screens numbered AL1andAL2 for theone-timealarm, a snooze alarm screen indicated bySNZ. The Hourly Time Signal screen is indicated bySIG.

All of the operations in this section are performed in the Alarm Mode, which you enter by pressing C.

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-Monthalarm

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, use Dto scroll through the alarm screens until the one whose time you want to set is displayed.

To set a one-timealarm, display an alarm screenAL1orAL2. To set the snooze alarm, display theSNZ screen.

The snooze alarm repeats every five minutes.

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 turns on the alarm automatically.

3.Press C to move the flashing in the sequence shown below to select other settings.

Hour

 

 

Minutes

 

 

Month

 

 

Day

 

 

 

4. While a setting is flashing, use Dand Bto change it as described below.

Screen

To do this:

Do this:

 

Change the hour

Use D (+) and B(–).

 

and minutes

• With the 12-hourformat, set the time correctly as

 

 

a.m. or p.m. (P indicator).

 

Change the month

• To set an alarm that does not include a month and/

 

and day

or day, set for each setting.

5. Press A to exit the setting screen.

Alarm Operation

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.

Alarm and Hourly Time Signal operations are performed in accordance with the Timekeeping Mode time.

To stop the alarm tone after it starts to sound, press any button.

Performing any one of the following operations during a 5-minuteinterval between snooze alarms cancels the current snooze alarm operation.

Displaying the Timekeeping Mode setting screen Displaying the SNZ setting screen

To test the alarm

In the Alarm Mode, hold down Dto sound the alarm.

To turn an alarm on and off

1. In the Alarm Mode, use Dto select an alarm. 2. Press Ato toggle it on and off.

Turning on a alarm (AL1,AL2, orSNZ) displays the alarm on indicator (ALM) on its Alarm Mode screen.

In all modes, the alarm on indicator is shown for any

alarm that is currently turned on.

The alarm on indicator flashes while the alarm is

sounding.

The snooze alarm indicator (SNZ) flashes while the snooze alarm is sounding and during the5-minuteintervals between alarms.

To turn the Hourly Time Signal on and off

1. In the Alarm Mode, use Dto select the Hourly Time Signal (SIG).

2. Press Ato toggle it on and off.

• The Hourly Time Signal on indicator (SIG) is shown on the display in all modes while this function is turned on.

Illumination

Auto light switch on indicator

This watch has an EL (electro-luminescent)panel that causes the entire display to glow for easy reading in the dark. The watch’s auto light switch turns on illumination automatically 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 “Illumination Precautions” for other important information about using illumination.

To illuminate the display manually

In any mode, press Bto turn on illumination.

The above operation turns on illumination regardless of the current auto light switch setting.

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.

To specify the illumination duration

 

 

 

 

1. In the Timekeeping Mode, hold down Auntil the

 

 

 

 

seconds start to flash, which indicates the setting

 

 

 

 

screen.

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2. While the seconds are flashing, press Bto toggle the

setting between 1.5 seconds ( ) and 3 seconds ( ).

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3. Press A twice to exit the setting screen.

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About the Auto Light Switch

Turning on the auto light switch causes illumination to turn on, whenever you position your wrist as described below in any mode.

Moving the watch to a position that is parallel to the ground and then tilting it towards you more than 40 degrees causes illumination to turn on.

Wear the watch on the outside of your wrist.

Parallel to

More than

ground

40°

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 startle or distract others around you.

When you are wearing the watch, make sure that its auto light switch is turned off before riding 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 Bfor about three 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.

In order to protect against running down the battery, the auto light switch will turn off automatically approximately six hours after you turn it on. Repeat the above

procedure to turn the auto light switch back on if you want.

3

Operation Guide 3088

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.

Moon Phase Indicator

The Moon phase indicator of this watch indicates the current phase of the Moon as shown below.

Moon phase indicator

 

(part you cannot see)

 

 

 

 

Moon phase (part you can see)

Moon Phase

 

 

 

 

 

 

 

 

 

 

 

Indicator

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Moon Age

0.0 - 1.8

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

 

 

 

 

 

 

 

 

 

 

Moon Phase

New

 

First

 

 

 

Full

 

Last

 

 

Moon

 

Quarter

 

 

 

Moon

 

Quarter

 

 

 

 

(Waxing)

 

 

 

 

 

(Waning)

 

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-rightorientation 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-daycycle. 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 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.

Tide Graph

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.

 

 

 

High Tide

 

 

Low Tide

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Rising

(Falling

(Rising

 

Tide)

Tide)

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.

The tide graph displayed by this watch is based on the current Moon age. Remember that the margin for error of the Moon age displayed by this watch is ± 1 day. The greater the error in a particular Moon age, the greater the error in the resulting tide graph.

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.

Graphic Area

The information shown in the graphic area depends on the current mode.

Graphic Area

Mode

Graphic Area

 

 

Timekeeping

Timekeeping Mode seconds

 

Tide/Moon Data

No indication

 

World Time

Timekeeping Mode seconds

 

Stopwatch

Stopwatch time seconds

 

Countdown Timer

Countdown time seconds

 

Alarm

No indication

Flash Alert

When Flash Alert is turned on, the illumination flashes for the alarms, the Hourly Time Signal, the countdown alarm, and stopwatch auto start.

To turn Flash

l

l

l l l l l l

 

 

l

 

 

l

 

 

l

l l l l l l

 

 

Alert on and off

1.In the Timekeeping Mode, hold down Afor about two seconds until the current time flashes on the display.

 

 

This is the setting screen.

 

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2.

Press C eight times to display the Flash Alert setting

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screen.

 

 

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3. Press D to toggle Flash Alert on (

displayed) and

ll

 

 

off (

displayed).

 

 

4.

Press A twice to exit the setting screen.

The Flash Alert setting you select with the above procedure is applied in all modes.

When Flash Alert is on,appears on the timekeeping screen for about one second whenever you enter the Stopwatch, Countdown Timer, or Alarm Mode.

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 alarms, the Hourly Time Signal, the countdown alarm, and stopwatch auto start all operate normally.

To turn the button operation tone on and off

In any mode (except when a setting screen is on the display), hold down Cto toggle the button operation tone on (not displayed) and off (displayed).

Holding down Cto turn the button operation tone on or off also causes the watch’s current mode to change.

The indicator is displayed in all modes when the button operation tone is turned off.

Auto Return Features

If you leave the watch in the Alarm Mode or Tide/Moon Data Mode for two or three minutes without performing any operation, it changes to the Timekeeping Mode automatically.

If you leave a screen with flashing digits on the display for two or three minutes without performing any operation, the watch exits the setting screen automatically.

Scrolling

The Band 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 at high speed.

Initial Screens

When you enter the World Time or Alarm Mode, the data you were viewing when you last exited the mode appears first.

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 to00 without changing the minutes.

The year can be set in the range of 2000 to 2099.

The watch’s built-infull 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 battery replaced.

World Time

The seconds count of the World Time is synchronized with the seconds count of the Timekeeping Mode.

All World Time Mode times are calculated from the current time in the Timekeeping Mode using UTC time differential values.

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-widescientific 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.

Illumination Precautions

The electro-luminescentpanel that provides illumination loses power after very long use.

Illumination 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.

Illumination turns off automatically whenever an alarm sounds.

Frequent use of illumination runs down the battery.

Auto light switch precautions

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.

More than 15 degrees

Illumination may not turn on if the face of the watch is

too high

more than 15 degrees above or below parallel. Make

 

sure that the back of your hand is parallel to the ground.

 

Illumination 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 illumination does not turn on, 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, illumination may not turn on until about one second after you turn the face of the watch towards you. This does not necessarily indicate malfunction of the auto light switch.

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.

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