Operation Guide 3088
4
Reference
This section contains more detailed and technical information about watch oper ation.
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
• The Moon phase indicator shows the Moon as vie wed at noon from a position in the
Nor thern Hemisphere looking south. Note that at times the image shown b y the
Moon phase indicator may diff er from that of the actual Moon in your area.
• The left-right orientation of the Moon phase is rev ersed when viewing from the
Southern Hemisphere or from a point near the equator.
Moon Phase
Indicator
Moon Age
Moon Phase New
Moon
First
Quarter
(W axing)
Full
Moon
Last
Quarter
(Waning)
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 (part you can see)(part you cannot see)
Moon Phases and Moon Age
The Moon goes through a regular 29.53-day cycle. During each cycle, the Moon
appears to wax and wane as the relativ e 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 displa yed Moon age is ± 1 da y .
Tide Graph
The Tide Gr aph has six graphic segments, each of which indicates a diff erent tide
level. The current tide lev el is indicated by the displa yed graphic segment.
High Tide
Low Tide
(Falling
Tide)
(Rising
Tide)
(Rising
Tide)
Tidal Movements
Tides are the periodic rise and fall of the water of oceans, seas, ba ys, and other
bodies of water caused mainly by the g ravitational interactions betw een the Ear th,
Moon and Sun. Tides rise and fall about ev er y 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 diff ers according to your current location, so you must
specify a lunitidal interval in order to obtain the correct tide graph readings.
The tide graph displa yed by this w atch is based on the current Moon age.
Remember that the margin for error of the Moon age displa yed by this w atch is ± 1
day . The greater the error in a par ticular 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 diff erential between the
Moon’s tr ansit over the meridian until high tide and the time diff erential between the
Moon’s tr ansit over the meridian until low tide are kno wn as the “lunitidal inter v al”.
When setting the lunitidal interval for this watch, use the time diff erential between the
Moon’s tr ansit over the meridian until high tide .
Graphic Area
The information shown in the graphic area depends on the current mode .
Graphic Area
Flash Alert
When Flash Aler t is turned on, the illumination flashes for the alarms, the Hourly Time
Signal, the countdown alarm, and stopwatch auto start.
Mode
Timekeeping
Tide/Moon Data
World Time
Stopwatch
Countdown Timer
Alarm
Graphic Area
Timekeeping Mode seconds
No indication
Timekeeping Mode seconds
Stopwatch time seconds
Countdown time seconds
No indication
T o turn Flash Alert on and off
1. In the Timek eeping Mode, hold down A for about two
seconds until the current time flashes on the displa y .
This is the setting screen.
2. Press C eight times to display the Flash Alert setting
screen.
3. Press D to toggle Flash Alert on (
display ed) and
off (
display ed).
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 f or about one second whene ver you
enter the Stopwatch, Countdown Timer, or Alarm Mode.
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
Button Operation T one
The button operation tone sounds an y time you press one
of the watch’ s buttons. Y ou can tur n the button operation
tone on or off as desired.
• Even if y ou turn off the button operation tone, the
alarms, the Hourly Time Signal, the countdown alarm,
and stopwatch auto start all operate normally .
T o turn the button operation tone on and off
In any mode (except when a setting screen is on the
display), hold down C to toggle the button operation tone
on (
not displayed) and off ( displa yed).
• Holding down C to turn the button operation tone on or off also causes the w atch’ s
current mode to change.
• The
indicator is display ed in all modes when the button operation tone is turned
off.
Auto Return Features
• If you leav e the watch in the Alarm Mode or Tide/Moon Data Mode f or two or three
minutes without perf orming any operation, it changes to the Timek eeping Mode
automatically .
• If you leav e a screen with flashing digits on the display f or two or three minutes
without performing any oper ation, the watch exits the setting screen automatically .
Scrolling
The B and D buttons are used in v arious modes and setting screens to scroll
through data on the display . In most cases, holding do wn these buttons during a scroll
operation scrolls at high speed.
Initial Screens
When you enter the World Time or Alar m Mode, the data you w ere 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 b y 1. In the range of 00 to 29, the seconds are
reset to 00 without changing the minutes.
• The year can be set in the range of 2000 to 2099.
• The watch’ s built-in full automatic calendar makes allow ances for different month
lengths and leap years . Once you set the date, there should be no reason to change
it e xcept after you hav e the watch’ s batter y replaced.
W orld 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 v alues.
• The UTC differential is a v alue that indicates the time diff erence between a
reference point in Greenwich, England and the time z one where a city is located.
• The letters UTC is the abbre viation for Coordinated Univ ersal Time, which is the
world-wide scientific standard of timekeeping. It is based upon carefully maintained
atomic (cesium) clocks that k eep 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-luminescent panel that provides illumination loses po wer after very long
use.
• Illumination ma y be hard to see when viewed under direct sunlight.
• The watch may emit an audib le sound whenever the displa y is illuminated. This is
due to vibration of the EL panel used f or illumination, and does not indicate
malfunction.
• Illumination turns off automatically whenever an alarm sounds .
• Frequent use of illumination runs down the battery .
More than 15 degrees
too high
Auto light s witch precautions
• A void wearing the watch on the inside of y our 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 y our wrist, turn off the auto light switch feature.
• Illumination ma y not turn on if the face of the watch is
more than 15 degrees abov e or below parallel. Make
sure that the back of your hand is par allel to the ground.
• Illumination turns off in about one second, even if y ou
keep the watch pointed to wards your f ace.
• Static electricity or magnetic force can interf ere with proper operation of the auto
light switch. If illumination does not turn on, tr y moving the watch back to the starting
position (parallel with the ground) and then tilt it bac k toward y ou again. If this does
not work, drop your arm all the wa y 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 w atch towards you. This does not necessarily indicate
malfunction of the auto light s witch.
• Y ou may notice a very faint clic king sound coming from the watch when it is shaken
back and f orth. This sound is caused by mechanical operation of the auto light
switch, and does not indicate a prob lem with the watch.