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2.3.1.1
Dive mode
From the Settings menu, by selecting Dive
and pressing-and-releasing the push-wheel
you enter the Dive Settings screen.
From the Dive Settings menu, by selecting
Modes and pressing-and-releasing the
push-wheel you enter the Modes screen.
Your HUD allows you to choose between
SCUBA, Gauge, Apnea and CCR modes.
Rotating the push-wheel toggles you to
your mode selection. A press-and-release
of the push-wheel saves your selection and
returns you to the Dive Settings screen.
• The SCUBA mode shows recreational
No Stop Time, RBT and calculates
required decompression.
• The Gauge mode does not calculate
decompression. It is used as a bottom
timer. At the end of a Gauge mode
dive a 48-hour locking interval occurs.
There are no additional setting menus
in Gauge mode. For more information
on diving in Gauge mode see chapter:
Gauge mode.
• The Apnea mode also does not
calculate decompression. It is used for
freediving. At the end of the dive the
48-hour locking interval occurs as well.
There are no additional setting menus
GALILEO HUD USER MANUAL
in Apnea mode. For more information
on diving in Apnea mode see chapter:
Apnea mode.
• The CCR mode is used for close-
circuit rebreather diving. See chapter:
CCR mode for information about the
additional settings.
F
NOTE: Since Gauge and Apnea
modes do not track tissue saturation,
a 48-hour locking interval occurs
between the time the last dive is
made in Gauge or Apnea mode and
a change to SCUBA or CCR mode is
possible. Conversely, the HUD, once
it has been dived in SCUBA or CCR
mode, cannot be changed to Gauge
or Apnea mode until the no-fly time
has elapsed.
If you decide to change modes before the
48-hour interval ends, you will have to go
to the desaturation reset menu and perform
a manual desaturation reset. For more
information on the manual desaturation
reset function, go to chapter: Desat reset
2.3.1.2
Deco algorithm
Prof. Albert A. Bühlmann, a name most
divers know well, wrote the algorithms
that continue to form the basis of
decompression calculations today.
Bühlmann created the Bühlmann ZH-L16C.
For over 20 years, UWATEC has been
developing this algorithm and constantly
adapting it to be state of the art. The result
is the ZH-L16 ADT MB PMG algorithm,
which is the primary – or default – algorithm
used in the HUD.
However, some divers prefer to return to
the roots of Prof. Bühlmann's thinking on
calculating decompression, known as the
Gradient Factors (GF) approach, which
provides additional options for increased
conservatism. Gradient Factors can be set
from no conservatism at all (100/100) to
any value in between. The ZH-L16C basic
diving algorithm is used as a basis for this
Gradient Factor approach.
The
technical
diving
particular, finds that the Gradient Factors
approach best suits their diving needs. So
in an effort to address the preferences of all
community,
in
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