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Digital Compass Precautions
Magnetic North and True North
The northerly direction can be expressed either as magnetic north or true
True north
north, which are different from each other. Also, it is important to keep in
mind that magnetic north moves over time.
Magnetic north is the north that is indicated by the needle of a compass.
Magnetic north
True north, which is the location of the North Pole of the Earth's axis, is
the north that is normally indicated on maps.
The difference between magnetic north and true north is called the
"declination". The closer you get to the North Pole, the greater the
declination angle.
Earth
E-40
Checking the Current Time in a Different Time Zone
You can use World Time to view the current time in one of 29 time zones around the globe. The currently
selected city is called the "World Time City".
Hands and Indicators
NYC (NEW YORK)
z Hour Hand: Indicates the hour of the current time in the World Time City.
x Second Hand: Indicates the current World Time City for about three
seconds after the World Time mode is entered.
c Minute Hand
b Lower Dial Hand: Points to WT.
n Day Indicator
Pressing A causes the x Second Hand to move to the current World Time
City for about three seconds.
Important!
Time calibration signal reception is disabled while the watch is in the World
Time Mode.
E-42
4. Hold down A for about one second to cycle through the summer time settings as shown below.
A
AUTO
5. After selecting the city you want, push the crown back in to return to the World Time Mode.
Swapping your Home City and World Time City
You can use the procedure below to swap your Home City and World Time City. This capability can come
in handy when you frequently travel between two locations in different time zones.
The following example shows what happens when the Home City and World
Time City are swapped while the Home City originally is TYO (Tokyo) and the
World Time City is NYC (New York).
Before swapping
After swapping
E-44
Using the Stopwatch
You can use the Stopwatch Mode to measure elapsed time and lap times, and to recall lap times. Up to
10 lap times can be stored in memory. There is also memory to record the fastest lap time. Though no
more lap times are stored after 10 times are in memory, the fastest lap time continues to be updated as
required. Starting a new elapsed time operation clears all of the memories (including fastest lap time).
What is a lap time?
A lap time is the time elapsed over a specifi c segment of a race.
Example: Car race on an oval track
Lap 1
Start
E-46
Operation Guide 5325
A
STD
DST
A
Home City
World Time City
Tokyo
New York
10:08 p.m.
9:08 a.m.
(Standard time)
(Daylight saving time)
New York
Tokyo
9:08 a.m.
10:08 p.m.
(Daylight saving time)
(Standard time)
Lap 2
Lap 3
Location
Taking a direction reading when you are near a source of strong magnetism can cause large errors
in readings. Because of this, you should avoid taking direction readings while in the vicinity of the
following types of objects: permanent magnets (magnetic necklaces, etc.), concentrations of metal
(metal doors, lockers, etc.), high tension wires, aerial wires, household appliances (TVs, personal
computers, washing machines, freezers, etc.).
Accurate direction readings are impossible while in a train, boat, air plane, etc.
Accurate readings are also impossible indoors, especially inside ferroconcrete structures. This is
because the metal framework of such structures picks up magnetism from appliances, etc.
Storage
The precision of the bearing sensor may deteriorate if the watch becomes magnetized. Because
of this, you should store the watch away from magnets or any other sources of strong magnetism,
including: permanent magnets (magnetic necklaces, etc.) and household appliances (TVs, personal
computers, washing machines, freezers, etc.).
Whenever you suspect that the watch may have become magnetized, perform the procedure under
"To perform bidirectional calibration" (page E-37).
To view the time in another time zone
1. In the Timekeeping Mode, press C once to enter the World Time Mode.
The b Lower Dial Hand will move to WT.
To select the UTC zone as your World Time, simply hold down B for about three seconds. No other
operation is required.
2. Pull out the crown.
The x Second Hand points to the currently selected World Time city code.
The b Lower Dial Hand will indicate AUTO, STD (standard time) or DST (daylight saving time),
which indicates the current daylight saving time setting.
If you do not perform any operation with the crown for about two minutes after pulling it out, crown
operations will become disabled and the watch hands will no longer move when you rotate the
crown. If this happens, push the crown back in and then pull it out again.
3. Rotate the crown to move the x Second Hand to the city code you want to select as the World Time
City.
Each time you select a city code, the z Hour Hand, c Minute Hand, and n Day Indicator move to
the current time and day for that city code. For details about city codes, see the "City Code Table" at
the back of this manual.
If you think that the time indicated for the selected World Time City is not correct, it probably means
that there is something wrong with your Home City settings. Use the procedure under "To confi gure
Home City settings" (page E-25) to correct the Home City settings.
To swap your Home City and World Time City
1. In the World Time Mode, pull out the crown.
2. Rotate the crown to move the x Second Hand to the city you want to select
as your World Time City.
In this example, you would move the x Second Hand to NYC in order to
select New York as the World Time City.
Wait until the z Hour Hand and c Minute Hand complete their move to
the time in the currently selected World Time City. You will not be able to
perform step 4 of this procedure until the hands stop moving.
3. Push the crown back in.
4. Hold down A for about three seconds until the watch beeps.
This will make the World Time City (NYC in this example) your new Home
City. At the same time, it will change the Home City you had selected prior
to step 4 (TYO in this example), to your World Time City.
After swapping the Home City and World Time City, the watch will stay in
the World Time Mode. The x Second Hand will point to your new World
Time City (TYO in this example).
Note
If your current World Time City supports time calibration signal reception, making it your Home City
enables calibration signal reception for that city.
Hands and Indicators
z Hour Hand: Indicates the stopwatch minute count
(1 revolution = 60 minutes).
x Second Hand: Indicates the 1/20 (0.05)-second count during stopwatch
operation.
c Minute Hand: Indicates the stopwatch seconds count.
b Lower Dial Hand: Indicates the current lap.
To enter and exit the Stopwatch Mode
In the Timekeeping Mode, press C twice to enter the Stopwatch Mode.
The b Lower Dial Hand will move to 1 (Lap 1).
To perform an elapsed time operation
A
A
A
Start
Stop
(Restart)
To perform lap time measurement
. . . . . .
A
B
B
Start
Lap (LAP1)
Lap (LAP2)
Each press of B records a lap time. You can record up to 10 lap times. After that, you can still perform
lap time operations, but they will not be recorded.
A
B
(Stop)
Reset
A
B
Stop
Reset
E-41
E-43
E-45
E-47
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