GPS signal reception

Place where GPS signals can be easily received/Place where GPS signals cannot be received

maru Easy to receive

Outdoors under an open sky with good visibility


sankaku Difficult to receive

The smaller the sky, the more difficult it is to receive GPS signals. In addition, it will also be difficult to receive GPS signals, if there is something that obstructs the GPS signals during reception (in particular, during time zone adjustment).



Between tall buildings

Near wooded area


Indoors with windows

GPS signals cannot be received depending on window glass type.
Refer to the batsu Cannot receive.”

batsu Cannot receive

The sky cannot be seen or only part of the sky can be seen.

There is something hindering the reception.



Indoors without windows


During passage of a tunnel

Through special glass with thermal emission shield effect, etc.

Close to equipment generating noise or performing wireless communications

List of GPS signal reception methods (characteristics of all three types)

Reception method

Time adjustment

Time zone adjustment

Leap second data reception



How to manually adjust the time
To adjust only the time by GPS signal reception (manual time adjustment)

Automatic time adjustment
Automatic time adjustment


How to adjust the time zone
To adjust the time zone and time by GPS signal reception (time zone adjustment)



Time adjustment

Precise current time of the set time zone is displayed

Time zone identification and time adjustment

Time zone where you are is identified, and the precise current time, reflecting the addition conditions of DST (Daylight Saving Time), is displayed

Leap second reception

Ready for leap second data reception and receiving Leap second data Leap second (Automatic leap second reception function)

Number of acquired satellites necessary for reception

One unit (to obtain only time information)

Basically more than 4 units (to obtain time information and time zone information)


Time taken for reception

3 seconds to 1 minute

30 seconds to 2 minutes

30 seconds to 18 minutes

What kind of situation

To set the watch to the precise time while it is used in the same time zone

When the watch is used in a different time zone

This is performed automatically after GPS signal reception (automatic time adjustment, manual time adjustment, or time zone adjustment) on or after June 1st and December 1st.

GPS signal reception Q & A


When the watch is moved to a different time zone, does the watch automatically display the local time?


The watch does not automatically display the local time just by changing location.
If you are in a place where GPS signals can be easily received, adjust the time zone. The watch automatically displays the local time.
When you are in a place where GPS signals cannot be received, manually set the time zone.
Manual time zone setting
The watch can be set to all time zones around the world.


Is DST (Daylight Saving Time) automatically changed by receiving GPS signals?


The settings for DST (Daylight Saving Time) are done automatically by doing a time zone adjustment.
The time automatically switches to adjust for the adoption and duration of DST (Daylight Saving Time) for regions that follow DST (Daylight Saving Time).
“Normal time” always appears for regions that do not adopt DST (Daylight Saving Time). Manually switch the DST (Daylight Saving Time) setting if you have moved to a place that adopts different DST (Daylight Saving Time) details, even if the area is the same time zone.
Set DST (Daylight Saving Time)
Even in the same time zone, some countries and regions do not adopt DST (Daylight Saving Time).
Time zone display and list of time zones around the world


Is it necessary to carry out special operation for years in which a leap second is added?


No special operation is necessary.
Since the watch receives leap second data at the same time of receiving GPS signals (automatic time adjustment, manual time adjustment, or time zone adjustment) on or after June 1st and December 1st, a leap second is automatically added by periodically receiving GPS signals. For details, refer to Leap second (Automatic leap second reception function).

Check that reception was successful (reception result display)

The type of reception and reception result (success or failure) of the last GPS signal reception is displayed for 5 seconds.

  1. Press Button A once and then release it

  2. The seconds hand and indicator hand display the reception result.

    29-01 + Push ButtonA

    Press and then release

    When Button A is kept pressed, the watch enters the Manual time adjustment operation.

  3. The result of the reception is displayed

  4. The seconds hand displays the result of the GPS signal reception (time adjustment or time zone adjustment).

    The indicator hand points to “1” or “4+” which shows “time adjustment” or “time zone adjustment.”

    29-02 + Reception result display

    Seconds hand

    Indicator hand

    Seconds hand: Reception result (success/failure)







    Y 8-second position

    N 52-second position

    Indicator hand:
    Reception method (time adjustment or time zone adjustment)


    1 (Time adjustment)

    4+ (Time zone adjustment)


    5X53_Indicator receiving process-1.1
    5X53_Indicator receiving process-2.1

    The indicator hand points to “4+” as a result of time zone adjustment.

    After 5 seconds have elapsed or when Button B is pressed, the watch returns to the time display mode.

When the reception result is Y

The reception was successful.
Use the watch as it is.

When the reception result is N

Move to the outdoors where GPS signals can be easily received as necessary to receive GPS signals.

When approximately four days have elapsed after successful reception, the reception result display becomes “N”.

Even under a state where GPS signal cannot be received, the watch operates with quartz accuracy (at loss/gain ±15 seconds per month).

When the reception has failed in any way, manually set the time and date.