USER’S GUIDE 2477
3
Countdown Timer
You can set the countdown timer within a range of 1
to 60 minutes. An alarm sounds when the countdown
reaches zero.
•
The initial default countdown start time when you
purchase the watch or after you have its battery
replaced is 15 minutes.
•
All of the operations in this section are performed in
the Countdown Timer Mode, which you enter by
pressing
C
.
To use the countdown timer
Press
D
while in the Countdown Timer Mode to start
the countdown timer.
•
When the end of the countdown is reached, the
alarm sounds for 10 seconds or until you stop it by
pressing any button. The countdown time is
automatically reset to its starting value after the
alarm stops.
Seconds
Timekeeping Mode time
(Home site time)
Minutes
•
Press
D
while a countdown operation is in progress to pause it. Press
D
again to resume the countdown.
•
The watch beeps as the countdown time passes the 5-minute mark.
•
To completely stop a countdown operation, first pause it (by pressing
D
),
and then press
A
. This returns the countdown time to its starting value.
To set the countdown start time
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
D
to increase the setting.
3. Press
A
to exit the setting screen.
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.
Graph
Moon age
Moon
Phase
0, 1, 29
New
Moon
2-5
6-9
First
Quarter
(Waxing)
10-13
14-16
Full
Moon
17-20
21-24
Last
Quarter
(Waning)
25-28
•
The light part of the Moon phase indicator shows the part of the Moon that is
visible in the sky during each particular phase.
Tide graph
Rising
Falling
Spring Tide
Intermediate
Tide
Neap Tide
High
Middle
Low
•
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 Phase and Moon Age
The Moon goes through a regular 29.53-day cycle during which it appears to
wax and wane due to how the Sun illuminates the Moon and the relative
positioning of the Earth, Moon, and Sun. The greater the angular distance
between the Moon and the Sun,* the more we see illuminated.
*
The angle to the Moon in relation to the direction at
which the Sun is visible from the Earth.
This watch performs a rough calculation of the current Moon age starting from
day 0 of the Moon age cycle. The actual Moon age average cycle is 29.53
days, but this can vary anywhere from –1 day to +1 day for specific months.
Since this watch performs calculations using integer values only (no fractions),
the margin for error of the displayed Moon age is
±
2 days.
Tide graph
The wave on the watch’s tide graph indicates the current tide.
▲
indicates that
the tide is currently rising, while
▼
indicates a falling tide. Neither
▲
nor
▼
is
on the display at high tide and low tide.
Lunitidal Interval
Theoretically, high tide is at the Moon’s transit over the meridian and low tide is
about six hours later. Actual high tide occurs somewhat later, due to factors
such as viscosity, friction, and underwater topography. Both the time differential
between the Moon’s transit over the meridian until high tide and the time
differential between the Moon’s transit over the meridian until low tide are
known as the “lunitidal interval.” When setting the lunitidal interval for this
watch, use the time differential between the Moon’s transit over the meridian
until high tide.
Auto return features
If you leave a screen with flashing digits 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
B
and
D
button are used in various modes and 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.
•
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 last 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.
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.
Backlight Precautions
The backlight uses an LED (light emitting diode) and a light guide panel that
cause the entire display to glow for easy reading in the dark. In any mode,
press
L
to illuminate the display for about three seconds.
•
The illumination provided by the backlight may be hard to see when viewed
under direct sunlight.
•
The backlight automatically turns off whenever an alarm sounds.
•
Frequent use of the backlight shortens the battery life.
