Operation Guide 3258

Adjusting the High Tide Time

Use the following procedure to adjust the high tide time within a particular date. You can find out high tide information for your area from a tide table, the Internet, or your local newspaper.

To adjust the high tide time

1.In the Tide/Moon Data Mode, use A (+) and C (–) to scroll to the date whose high tide time you want to change.

2. Hold down E until SET Hold appears on the display and then the hour digits start to flash.

3. Press A (+) and C (–) to change the hour setting.

4. When the hour is the setting you want, press D.

• This will cause the minute digits to flash.

5. Press A (+) and C (–) to change the minute setting.

6. When the minute setting is the way you want, press E to exit the adjustment screen and return to the Tide/Moon Data Mode screen.

• Pressing A and C at the same time while the time adjustment screen is displayed (steps 3 through 6 above) will return the high tide time to its initial factory default setting.

• Changing the Home City setting in the Timekeeping Mode returns the high tide time to its initial value.

• The high tide time setting is not affected by the DST (summer time) setting of the Timekeeping Mode.

•On some days, there are two high tides. With this watch, you can adjust the first high tide time only. The second high tide time for that day is adjusted automatically based on the first high tide time.

Reversing the Displayed Moon Phase

The left-right (east-west) appearance of the Moon depends on whether the Moon is north of you (northerly view) or south of you (southerly view) as you view it.

You can use the procedure below to reverse the displayed Moon phase so it matches the actual appearance of the Moon where you are located.

•To determine the viewing direction of the Moon, use a compass to take a direction reading of the Moon at its meridian passage.

•For information about the Moon phase indicator, see “Moon Phase Indicator” (page E-82).

To reverse the displayed Moon phase

1. In the Tide/Moon Data Mode, hold down E until SET Hold appears on the display and then the hour digits start to flash.

2. Press D twice.

• This will cause the Moon phase indicator to flash. This is the indicator switching screen.

3. Press A to toggle the Moon phase indicator between the southerly view (indicated by ) and northerly view (indicated by ).

•Northerly view: Moon is north of you.

• Southerly view: Moon is south of you.

4.When the Moon phase indicator setting is the way you want, press E to exit the switching screen and return to the Tide/Moon Data Mode screen.

E-80

E-81

 

 

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 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.

Moon Phase Indicator

Moon phase indicator

The Moon phase indicator of this watch indicates the current phase of the

Moon as shown below. It is based on the view of the left side of the moon

Moon age

at meridian transit from the northern hemisphere of the Earth. If the

 

 

appearance of the Moon phase indicator is reversed from the actual

 

Moon as viewed from your location, you can use the procedure under “To

 

reverse the displayed Moon phase” (page E-81) to change the indicator.

 

 

(part you cannot see)

 

 

 

Moon phase (part you can see)

 

 

 

 

 

 

 

 

 

 

 

 

Moon Phase

 

 

 

 

 

 

 

 

 

 

Indicator

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Moon Age

28.7-29.8

1.0-2.7

2.8-4.6

4.7-6.4

6.5-8.3

8.4-10.1

10.2-12.0

12.1-13.8

 

0.0-0.9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Moon Phase

New

 

 

 

 

 

First

 

 

 

 

Moon

 

 

 

 

 

Quarter

 

 

 

 

 

 

 

 

 

 

(Waxing)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Moon Phase

 

 

 

 

 

 

 

 

 

 

Indicator

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Moon Age

13.9-15.7

15.8-17.5

17.6-19.4

19.5-21.2

21.3-23.1

23.2-24.9

25.0-26.8

26.9-28.6

 

 

 

 

 

 

 

 

 

 

 

 

Moon Phase

Full

 

 

 

 

 

Last

 

 

 

 

Moon

 

 

 

 

 

Quarter

 

 

 

 

 

 

 

 

 

 

(Waning)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E-82

E-83

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 Tide Graph calculates and graphically represents current tide conditions in your Home City or a port city in the vicinity of the Home City based on longitudes, lunar day length, and lunitidal interval preset in watch memory, and on high tide times specified by you.

Tide Graph

The Tide Graph graphically represents the current tide condition using one of three patterns that represent spring tide, intermediate tide, and neap tide, as shown below.

Tide Name

Graph

Description

 

 

 

Spring Tide

 

Large difference between high tide

 

 

and low tide. Occurs a few days

 

 

before and after a New Moon and

 

 

Full Moon.

 

 

 

Intermediate Tide

 

Medium difference between high tide

 

 

and low tide.

 

 

 

Neap Tide

 

Small difference between high tide

 

 

and low tide. Occurs a few days

 

 

before and after the first quarter and

 

 

last quarter of a half moon.

 

 

 

•The Tide Graph flashes as shown below to indicate the tide range. High tide

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”.

E-84

E-85

 

 

Using the Alarm

To set an alarm time

Alarm number or SIG

Current time

Alarm time (Hour : Minutes)

You can set five independent daily alarms. When an alarm is turned on, an alarm will sound for about 10 seconds each day when the time in the Timekeeping Mode reaches the preset alarm time. This is true even if the watch is not in the Timekeeping Mode.

You can also turn on an Hourly Time Signal, which will cause the watch to beep twice every hour on the hour.

To enter the Alarm Mode

Use D to select the Alarm Mode (ALM) as shown on page E-24.

•About one second after ALM appears on the display, the display will change to show an alarm number (AL1 through AL5) or the SIG indicator. The alarm number indicates an alarm screen. SIG is shown when the Hourly Time Signal screen is on the display.

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

1. In the Alarm Mode, use A and C to scroll through the alarm screens until the one whose time you want to set is displayed.

AL1

 

 

 

AL2

 

 

 

AL3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SIG

 

 

 

AL5

 

 

 

AL4

 

 

 

 

 

 

 

 

 

 

Alarm ON/OFF indicator

2.Hold down E until SET Hold appears on the display and then the current settings start to flash.

•This is the setting screen.

3.Press D to move the flashing between the hour and minute settings.

4.While a setting is flashing, use A (+) and C (–) to change it.

•When setting the alarm time using the 12-hour format, take care to set the time correctly as a.m. (no indicator) or p.m. (P indicator).

5.Press E to exit the setting screen.

E-86

E-87