Operation Guide 3278/3279
| Moon phase (part you can see) |
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| (part you cannot see) | Tidal Movements | ||||||
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| Tides are the periodic rise and fall of the water of oceans, seas, bays, and other |
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| bodies of water caused mainly by the gravitational interactions between the Earth, |
Moon | Module |
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| Moon and Sun. Tides rise and fall about every six hours. The Tide Graph of this watch |
Phase | 3278 |
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| indicates tidal movement based on the Moon’s transit over a meridian and the lunitidal | ||
Indicator |
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| interval. The Tide Graph calculates and graphically represents current tide conditions | |
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| in your currently selected site or USER site based on longitudes, lunar day length, and |
| 3279 |
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| lunitidal interval preset in watch memory, and on high tide times specified by you. |
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Moon Age |
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| Full |
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| Last |
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Moon Phase | Moon |
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| Quarter |
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| (Waning) |
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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 |
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| and low tide. Occurs a few days |
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| before and after a New Moon and Full |
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| Moon. |
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Intermediate Tide |
| Medium difference between high tide |
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| and low tide. |
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Neap Tide |
| Small difference between high tide |
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| and low tide. Occurs a few days |
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| before and after the first quarter and |
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| last quarter of a half moon. |
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•The Tide Graph flashes as shown below to indicate the tide range.
Low tide | High tide | Low tide |
•The segments on either end of the Tide Graph flash during 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”. Tide data is calculated using the lunitidal intervals preset for each site.
Button Operation Tone | Power Saving Function |
The button operation tone sounds any time you press one of the watch’s buttons. You can turn the button operation tone on or off as desired.
• Even if you turn off the button operation tone, alarms, the Hourly Time Signal, and other beepers all operate normally.
Mute indicator
To turn the button operation tone on and off
1. In the Timekeeping Mode, hold down A until the city code starts to flash, which indicates the setting screen.
2. Press C nine times until the current button operation
tone setting ( | or | ) appears. |
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3. Press D to toggle the setting between | (tone on) | |||
and | (tone off). |
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4. Press A twice to exit the setting screen. |
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•The mute indicator is displayed in all modes when the button operation tone is turned off.
When turned on, the Power Saving function enters a sleep state automatically whenever the watch is left in an area for a certain period where it is dark. The table below shows how watch functions are affected by the Power Saving function.
Power saving indicator
Elapsed Time | Display | Operation |
in Dark |
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60 to 70 minutes | Blank, with Power Saving | All functions enabled, except for the |
| indicator flashing | display |
6 or 7 days | Blank, with Power Saving | Auto receive, beeper tone, |
| indicator not flashing | illumination, and display are disabled. |
•Wearing the watch inside the sleeve of clothing can cause it to enter the sleep state.
•The watch will not enter the sleep state between 6:00 AM and 9:59 PM. If the watch is already in the sleep state when 6:00 AM arrives, however, it will remain in the sleep state.
To recover from the sleep state
Perform any one of the following operations.
•Move the watch to a
•Press any button.
•Angle the watch towards your face for reading (page
To turn Power Saving on and off
1. In the Timekeeping Mode, hold down A until the city code starts to flash, which indicates the setting screen.
2. Press C 11 times until the Power Saving on/off screen appears.
3. Press D to toggle Power Saving on (
) and off (
).
4. Press A twice to exit the setting screen.
• The Power Saving indicator is on the display in all modes while Power Saving is turned on.
On/Off status
Radio-controlled Atomic Timekeeping Precautions
•Strong electrostatic charge can result in the wrong time being set.
•The time calibration signal bounces off the ionosphere. Because of this, such factors as changes in the reflectivity of the ionosphere, as well as movement of the ionosphere to higher altitudes due to seasonal atmospheric changes or the time of day may change the reception range of the signal and make reception temporarily impossible.
•Even if the time calibration signal is received properly, certain conditions can cause the time setting to be off by up to one second.
•The current time setting in accordance with the time calibration signal takes priority over any time settings you make manually.
•The watch is designed to update the date and day of the week automatically for the period January 1, 2000 to December 31, 2099. Setting of the date by the time calibration signal cannot be performed starting from January 1, 2100.
•This watch can receive signals that differentiate between leap years and
•Though this watch is designed to receive both time data (hour, minutes, seconds) and date data (year, month, day), certain signal conditions can limit reception to time data only.
•If you are in an area where proper time calibration signal reception is impossible, the watch keeps the time with the precision noted in “Specifications”.
•If you have problems with proper time calibration signal reception or if the time setting is wrong after signal reception, check your current city code, and DST (summer time) settings (page
•The Home City setting reverts to the initial default of TYO (Tokyo) whenever the battery power level drops to Level 5 or when you have the rechargeable battery replaced. If this happens, change the Home City to the setting you want (page
Transmitters
The time calibration signal received by this watch depends on the currently selected Home City code (page
•When a U.S. time zone is selected, the watch receives the time calibration signal transmitted from the United States (Fort Collins).
•When a Japanese time zone is selected, the watch receives the time calibration signal transmitted from Japan (Fukushima and Fukuoka/Saga).
•When a European time zone is selected, the watch receives the time calibration signals transmitted from Germany (Mainflingen) and England (Anthorn).
•When a China time zone is selected, the watch receives the time calibration signals transmitted from China (Shangqiu City).
•When your Home City is LIS, LON, MAD, PAR, ROM, BER, STO, ATH, MOW (which can receive both the Anthorn and Mainflingen signals), the watch first tries to pick up the signal it last successfully received. If that fails, it tries the other signal. For the first receive after you select your Home City, the watch tries the nearest signal first (Anthorn for LIS, LON, Mainflingen for MAD, PAR, ROM, BER, STO, ATH, and MOW).
Auto Return
•If you do not perform any operation for about two or three minutes while a setting screen (with a flashing setting) is on the display, the watch will exit the setting screen automatically.
•The watch will return to the Timekeeping Mode automatically if you do not perform any operation for two or three minutes in the Tide/Moon Data Mode.
Scrolling
The B and D 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 at high speed.