Operation Guide 3278/3279
To check the latest signal reception results
Press D to view the latest successful receive time and
date. Press D again to return to the previous screen.
The watch will return to the previous screen automatically
if you do not perform any operation for two or three
Auto receive is
You changed the time setting
turned on, but
The DST setting was changed
manually in the World Time Mode.
not appear on
You pressed a button while
signal receive was in progress.
Even if receive is successful, the
RCVD indicator will disappear
from the display each day when
the first auto receive operation
of the day is performed.
Time data (hour, minutes,
seconds) only was received
during the last receive
operation. The RCVD indicator
appears only when time data
and date data (year, month,
day) are both received.
In the Tide/Moon Data Mode, you can see the tide at a specified time for the tide site
you selected and the current date's moon phase for your Home City. You can specify a
date and view tide and moon data for that date.
See "Moon Phase Indicator" (page E-78) for information about the moon phase
indicator and "Tide Graph" (page E-82) for information about the tide graph.
All of the operations in this section are performed in the Tide/Moon Data Mode
It takes about two seconds to calculate tide graph data. You will not be able to
display a setting screen while data calculation is in progress.
Moon age is calculated to an accuracy of ±1 day.
You can view the current tide and moon age graph in the Timekeeping Mode (page
Tide/Moon Data Screens
In the Tide/Moon Data Mode, press A to toggle between the tide data screen and the
moon data screen.
Tide Data Screen
Current tide level
Current tide range
Month – Day
To adjust the high tide time
1. In the Tide/Moon Data Mode, press A to display the
Moon Data Screen (page E-36).
2. Press D to scroll the date until one whose high tide
time you want to change is displayed.
3. Hold down A until the hour digits start to flash.
4. Press D (+) and B (–) to change the hour setting.
5. When the hour is the setting you want, press C.
This will cause the minute digits to flash.
6. Press D (+) and B (–) to change the minute setting.
7. When the minute setting is the way you want, press A
to exit the adjustment screen and return to the Tide/
Moon Data Mode screen.
Pressing D and B at the same time while the time
adjustment screen is displayed (steps 4 through 7
above) will return the high tide time to its initial factory
The high tide time setting is affected by the DST
(summer time) setting of the Timekeeping Mode.
What you should do
Perform manual signal receive
or wait until the next auto
signal receive operation is
Check to make sure the watch
is in a location where it can
receive the signal (page E-16).
Moon Data Screen
Month – Day
Signal Reception Troubleshooting
Check the following points whenever you experience problems with signal reception.
The watch is not in the
Your current Home City is not
one of the following: LIS, LON,
MAD, PAR, ROM, BER, STO,
ATH, MOW, HKG, BJS, TPE,
SEL, TYO, HNL, ANC, YVR,
LAX, YEA, DEN, MEX, CHI,
NYC, YHZ, or YYT
A countdown timer operation is
If the time is one hour off, the
DST setting may be incorrect.
The Home City code setting is
not correct for the area where
you are using the watch.
For further information, see "Important!" (page E-16) and "Radio-controlled Atomic
Timekeeping Precautions" (page E-87).
The Tide Graph that appears first when you enter the Tide/Moon Data Mode shows
the data at 6:00 a.m. for your currently selected tide site on the current date, according
to the Timekeeping Mode. From there you can specify another time on the same date.
If the tide data is not correct, check your Timekeeping Mode settings and correct them
if necessary. See "To configure tide site settings" (page E-75) for more information.
If you feel that the information shown by the Tide Graph is different from actual tide
conditions, you need to adjust the high tide time. See "Adjusting the High Tide Time"
(page E-37) for more information.
The moon phase and moon age information that appears first when you enter the
Tide/Moon Data Mode shows the data at noon for your currently selected Home City
on the current date, according to the Timekeeping Mode. After that you can specify
another date to view data.
If the moon data is not correct, check your Timekeeping Mode settings and correct
them if necessary.
If the moon phase indicator shows a phase that is a mirror image of the actual moon
phase in your area, you can use the procedure under "Reversing the Displayed
Moon Phase" (page E-39) to change it.
When you display the Tide Data Screen, it initially shows tide data for 6:00 a.m. Use
the Tide Data Screen to specify the Tide Data time. You can press D and B to
change the displayed time in one-hour increments. The Tide Data time is scrolled
within the current date only. Scrolling past midnight does not change the date.
Use the Moon Data Screen to specify the Tide/Moon Data date. You can press D
and B to change the displayed date in one-day increments. Pressing D and B will
display the year of the displayed date.
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
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
What you should do
Enter the Timekeeping Mode
and try again.
Select LIS, LON, MAD, PAR,
ROM, BER, STO, ATH, MOW,
HKG, BJS, TPE, SEL, TYO,
HNL, ANC, YVR, LAX, YEA,
DEN, MEX, CHI, NYC, YHZ, or
YYT as your Home City (page
Enter the Countdown Timer
Mode and stop the countdown.
What you should do
Change the DST setting to
Auto DST (page E-73).
Select the correct Home City
code (page E-13).