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● Note on the leap second
One day normally is said to consist of 86,400 seconds. In fact, it can be longer or shorter than
this because of irregular changes in the rotation cycle of the earth. When the accumulated
fluctuations in the length of a day total plus or minus one second, one second must then be
added or subtracted as a correction factor. This is known as a “leap second”.
The leap second correction is executed every year or two simultaneously throughout the
world on the basis of information collected by astronomical observatories all over the world.
The correction is effected between 11:59'59" p.m. and 0:00'00" a.m. GMT either on December
31 or on June 30, during which one second is added or subtracted.
When this happens, please adjust your watch accordingly.
Please refer to your newspaper for information on the leap second.
LUMIBRITE
TM
LumiBrite is a newly developed luminous paint that is completely harmless to human beings and
the natural environment, containing no noxious materials such as radioactive substances.
LumiBrite absorbs the energy of sunlight or artificial light in a short time and stores it to emit
light in the dark.
For example, if exposed to a light of more than 500 lux for approximately 10 minutes, LumiBrite
can emit light for 5 to 8 hours.
Please note, however, that, as LumiBrite emits the light it stores, the luminance level of the light
decreases gradually over time. The duration of the emitted light may also differ slightly depending
on such factors as the brightness of the place where the watch is exposed to light and the distance
from the light source to the watch.
When you make a dive in dark water, LumiBrite may not emit light unless it has absorbed and
stored light sufficiently.