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ENGLISH
WARNING
The SEIKO Diving Computer Cal. DH33 is
intended for use in an inherently hazardous
form of recreation. Therefore, it is absolutely
essential that you strictly observe all
instructions for the use and maintenance of
the watch set forth in this manual.
First of all, this watch is for use in recreational
(no-decompression) diving in water having
a temperature range -5° C to +40° C (+23° F
to +104° F) only by adults in good health and
having average physical strength. It is not
suitable for use in saturation diving using
helium gas.
The watch uses an algorithm developed by
Mr. Randy Bohrer, one of the most
distinguished scientists in this field, which
expands upon the theories of the so-called
Swiss model. Unless you have undergone
scuba training with a qualified instructor,
you can neither fully appreciate the concept
of those theories and the nature of hazards
you may face while diving, nor properly
understand the meanings of indications and
warnings the watch provides.
The watch also provides data for Nitrox
diving. Do not use the watch for Nitrox
diving unless you are specially qualified to
dive with Nitrox, having full knowledge of the
potential hazards of Nitrox diving. It is
extremely hazardous to dive using the watch if
it is set for the wrong percentage of oxygen
(FO
2). You should check before every dive if the
FO
2 value set for the watch corresponds exactly
to the actual percentage of oxygen in your
scuba tank.
Anticipating emergencies, the watch provides
information for decompression diving. De-
compression diving can be quite hazardous,
however, and you should not make de-
compression dives.
Do not attempt to dive using the watch unless
you have been properly trained in scuba diving,
possess the requisite experience and skill to
dive safely, have thoroughly familiarized
yourself with the operation and maintenance
of the watch, and have tested all watch functions
prior to each dive.
In addition, sharp fluctuations in atmospheric
pressure and aquatic environments may affect
the performance of the watch. The indications
and warnings it provides serve only as general
guidelines to minimize the possibility of