Operation Guide 2531
5
•
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.
This watch perform 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 performs
calculations using integer values only (no fractions), the margin for error of the
displayed Moon age is
±
2 days.
Tide Graph
The black bar on the watch’s tide graph indicates the current tide.
High tide
High tide
Low 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.
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 Feature
If you leave a screen with flashing digits 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
A
and
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 through the data at high speed.
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 to
00
without changing the minutes.
•
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 2000 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 when battery power drops to Level 5.
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 runs down the battery.
Auto light switch precautions
•
Wearing the watch on the inside of your wrist and movement or vibration of your arm
can cause the auto light switch to activate and illuminate the display. To avoid
running down the battery, turn off the auto light switch whenever engaging in
activities that might cause frequent illumination of the display.
•
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 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 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.
More than 15 degrees
too high
Site Data List
Site
GMT Differential
Longitude
Latitude
Standard Time DST/Summer
ABIDJAN
0.0
1.0
4
°
W
5
°
N
ABU DHABI
4.0
5.0
54
°
E
24
°
N
ADDIS ABABA
3.0
4.0
39
°
E
9
°
N
ADEN
3.0
4.0
45
°
E
13
°
N
AMSTERDAM
1.0
2.0
5
°
E
52
°
N
ANCHORAGE
–9.0
–8.0
149
°
W
61
°
N
ATHENS
2.0
3.0
24
°
E
38
°
N
AZORES
–1.0
0.0
25
°
W
38
°
N
BANGKOK
7.0
8.0
101
°
E
14
°
N
BEIJING
8.0
9.0
116
°
E
40
°
N
BEIRUT
2.0
3.0
36
°
E
34
°
N
BOGOTA
–5.0
–4.0
74
°
W
5
°
N
BOSTON
–5.0
–4.0
71
°
W
42
°
N
BRASILIA
–3.0
–2.0
48
°
W
16
°
S
BUENOS AIRES
–3.0
–2.0
58
°
W
35
°
S
CAPE TOWN
2.0
3.0
18
°
E
34
°
S
CARACAS
–4.0
–3.0
67
°
W
11
°
N
CASABLANCA
0.0
1.0
8
°
W
34
°
N
CHICAGO
–6.0
–5.0
88
°
W
42
°
N
CHRISTCHURCH
12.0
13.0
173
°
E
44
°
S
DAKAR
0.0
1.0
17
°
W
15
°
N
DALLAS
–6.0
–5.0
97
°
W
33
°
N
FORT WORTH
DAMASCUS
2.0
3.0
36
°
E
34
°
N
DENVER
–7.0
–6.0
105
°
W
40
°
N
DETROIT
–5.0
–4.0
83
°
W
42
°
N
DHAKA
6.0
7.0
90
°
E
24
°
N
DUBAI
4.0
5.0
55
°
E
25
°
N
DUBLIN
0.0
1.0
6
°
W
53
°
N
EDMONTON
–7.0
–6.0
114
°
W
54
°
N
EL PASO
–7.0
–6.0
106
°
W
32
°
N
FRANKFURT
1.0
2.0
9
°
E
50
°
N
GOLD COAST
10.0
11.0
154
°
E
28
°
S
GUAM
10.0
11.0
145
°
E
13
°
N
HAMBURG
1.0
2.0
10
°
E
54
°
N
HANOI
7.0
8.0
106
°
E
21
°
N
HELSINKI
2.0
3.0
25
°
E
60
°
N
HONG KONG
8.0
9.0
114
°
E
22
°
N
HONOLULU
–10.0
–9.0
158
°
W
21
°
N
HOUSTON
–6.0
–5.0
95
°
W
30
°
N
ISTANBUL
2.0
3.0
29
°
E
41
°
N
JAKARTA
7.0
8.0
107
°
E
6
°
S
JEDDAH
3.0
4.0
39
°
E
22
°
N
KARACHI
5.0
6.0
67
°
E
25
°
N
KUALA LUMPUR
8.0
9.0
102
°
E
3
°
N
KUWAIT
3.0
4.0
48
°
E
29
°
N
LA PAZ
–4.0
–3.0
68
°
W
17
°
S
LAS VEGAS
–8.0
–7.0
115
°
W
36
°
N
LIMA
–5.0
–4.0
77
°
W
12
°
S
LISBON
0.0
1.0
9
°
W
39
°
N
LONDON
0.0
1.0
0
°
E
52
°
N
LOS ANGELES
–8.0
–7.0
118
°
W
34
°
N
MADRID
1.0
2.0
4
°
W
40
°
N
MANILA
8.0
9.0
121
°
E
15
°
N
MELBOURNE
10.0
11.0
145
°
E
38
°
S
MEXICO CITY
–6.0
–5.0
99
°
W
19
°
N
MIAMI
–5.0
–4.0
80
°
W
26
°
N
MILAN
1.0
2.0
9
°
E
45
°
N
MONTEVIDEO
–3.0
–2.0
56
°
W
35
°
S
MONTREAL
–5.0
–4.0
74
°
W
46
°
N
MUSCAT
4.0
5.0
59
°
E
24
°
N
NADI
12.0
13.0
177
°
E
18
°
S
NAIROBI
3.0
4.0
37
°
E
1
°
S
NAURU ISLAND
12.0
13.0
167
°
E
1
°
S
NEW ORLEANS
–6.0
–5.0
90
°
W
30
°
N
NEW YORK
–5.0
–4.0
74
°
W
41
°
N
NOME
–9.0
–8.0
165
°
W
64
°
N
NOUMEA
11.0
12.0
166
°
E
22
°
S
PAGO PAGO
–11.0
–10.0
171
°
W
14
°
N
PANAMA CITY
–5.0
–4.0
80
°
W
9
°
N
PAPEETE
–10.0
–9.0
150
°
W
18
°
S
PARIS
1.0
2.0
2
°
E
49
°
N
PERTH
8.0
9.0
116
°
E
32
°
S
PHNOM PENH
7.0
8.0
105
°
E
12
°
N
PORT OF SPAIN
–4.0
–3.0
62
°
W
11
°
N
PORT VILA
11.0
12.0
168
°
E
18
°
S
PRAIA
–1.0
0.0
24
°
W
15
°
N
PYONGYANG
9.0
10.0
126
°
E
39
°
N
RIYADH
3.0
4.0
47
°
E
25
°
N
ROME
1.0
2.0
13
°
E
42
°
N
SAN FRANCISCO
–8.0
–7.0
122
°
W
38
°
N
SANTIAGO
–4.0
–3.0
71
°
W
33
°
S
SAO PAULO
–3.0
–2.0
47
°
W
24
°
S
SEATTLE
–8.0
–7.0
122
°
W
48
°
N
SEOUL
9.0
10.0
127
°
E
38
°
N
SHANGHAI
8.0
9.0
121
°
E
31
°
N
SINGAPORE
8.0
9.0
104
°
E
1
°
N
STOCKHOLM
1.0
2.0
18
°
E
59
°
N
SYDNEY
10.0
11.0
151
°
E
34
°
S
TAIPEI
8.0
9.0
121
°
E
25
°
N