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Operation Guide 4779 4780
1
MO0610-EA
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.
About This Manual
• Depending on the model of your watch, display text
appears either as dark figures on a light background
(Module 4779), or light figures on a dark background
(Module 4780). All sample displays in this manual are
shown using dark figures on a light background.
• Button operations are indicated using the letters shown
in the illustration.
• For the sake of simplicity, the sample displays in this
manual do not show the analog hands of the watch.
• Each section of this manual provides you with the
information you need to perform operations in each
mode. Further details and technical information can be
found in the “Reference” section.
Module 4779
Module 4780
General Guide
• Press C to change from mode to mode.
• In any mode (except when a setting screen is on the display), press B to illuminate
the display.
Temperature Data
Recall Mode
Stopwatch Mode
World Time Mode
Tide/Moon Data Mode
▲
▲
▲
Countdown Timer
Mode
▲
▲
Alarm Mode
Press C.
▲
Hand Setting Mode
Timekeeping Mode
▲
▲
Timekeeping
Use the Timekeeping Mode to set and view the current time and date. This watch
features separate digital and analog timekeeping. The procedures for setting the
digital time and analog time are different.
• In the Timekeeping Mode, press A to toggle between the thermometer screen and
the temperature tendency screen.
• The tide graph shows tidal movements for the current date in accordance with the
current time as kept in the Timekeeping Mode.
Temperature Tendency
Screen
Temperature
tendency
graph
PM indicator
Hour : Minutes
Seconds
Day of week –
Day
Moon
phase
indicator
Press A.
▲
▲
Thermometer Screen
Thermometer
Tide
graph
• The Moon phase indicator shows the current Moon phase in accordance with the
current date as kept in the Timekeeping Mode.
• See “Thermometer” for details about the thermometer screen and temperature
tendency graph.
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 Digital Time and Date
This watch is preset with UTC differential values that represent each time zone
around the globe. Before setting the digital time, be sure to first set the UTC
differential for your Home Site, 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 digital time and date
1.In the Timekeeping Mode, hold down A until the
seconds start to flash, which indicates the setting
screen.
• Be sure to configure the correct UTC differential for
your Home Site before configuring any other
Timekeeping Mode settings.
• See the “UTC Differential/City Code List” for
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
Hour
UTC
Differential
Minutes
Year
DST
Day
Month
Seconds
Temperature
Unit
12/24-Hour
Format
Temperature Sensor
Calibration
Screen: To do this:
Reset the seconds to 00
Toggle between Daylight Saving
Time (ON) and Standard Time (OF)
Specify the UTC differential
Change the hour or minutes
Toggle between 12-hour (12H) and
24-hour (24H) timekeeping
Do this:
Press D.
Press D.
Use D (+) and B (–).
Use D (+) and B (–).
Press D.
Use D (+) and B (–).
Change the year, month or day
3. When the setting you want to change is flashing, use D and B to change it as
described below.
•See “Daylight Saving Time (DST) Setting” below for details about the DST setting.
• The UTC differential setting range is –12.0 to +14.0, in 0.5-hour units.
• For information about settings other than the time and date, see the following.
Temperature Sensor Calibration: “Temperature Sensor Calibration”
Temperature Unit: “To specify the temperature display unit”
4. Press A twice to exit the setting 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 displayed automatically in accordance with the date (year,
month, and day) settings.
• When DST is turned on, the UTC differential setting range is –11.0 to +15.0, in 0.5-
hour units.
• Any time the seconds setting is changed, the analog hands are adjusted accordingly.
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 digital time between DST and Standard Time
1.In the Timekeeping Mode, hold down A until the
seconds start to flash, which indicates the setting
screen.
2. Press C once and the DST setting screen appears.
3. Press D to toggle between Daylight Saving Time (
ON
displayed) and Standard Time (OF displayed).
4. Press A twice to exit the setting screen.
• The DST indicator appears on the Timekeeping, Tide/
Moon Data, Alarm, and Hand Setting 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.
DST indicator
On/Off status
• The UTC differential indicates the time differential with Greenwich, England.
• The letters UTC is the abbreviation for Coordinated Universal Time, which is the
world-wide scientific standard of timekeeping. It is based upon carefully maintained
atomic (cesium) clocks that keep time accurately to within microseconds. Leap
seconds are added or subtracted as necessary to keep UTC in sync with the Earth’s
rotation.
• The lunitidal interval is the time elapsing between the Moon’s transit over a meridian
and the next high tide at that meridian. See “Lunitidal Interval” for more information.