Oceanic VEO 100 Nx User manual

DIVE COMPUTERS 101
DIVE COMPUTERS 101
•Dive Computers 101 is designed to provide
divers with the theory, operation and benefits of
multilevel diving with Oceanic Dive Computers.
•OBJECTIVES:
•Have A basic understanding of how Dive Computers
work
•Understand the advantages of Dive Computers vs. dive
tables
•Understand the pre-dive setup, planning, underwater
operation and post-dive features of a Dive Computer
•Determine which Dive Computer features will best suit
your type of diving

HOW A DIVE COMPUTER WORKS
HOW A DIVE COMPUTER WORKS
•Sensors send data to the
Analog to Digital (A/D)
Converter.
•A/D Converter changes
analog data to digital
signals.
•The Micro Processor
calculates the data and
presents it to the diver via
the LCD Display.

COMPUTERS vs. TABLES
COMPUTERS vs. TABLES
•When using basic dive tables, the profile is
based on the maximum depth reached for the
total time of the dive. As a example: a diver
performs a dive for a total time of 24 minutes
and the deepest part of the dive was 88 feet. On
every recreational dive table the depth will be
rounded up to the next highest, in this case 90
feet. Even if the diver only spent 2 minutes of
their dive at 88 feet and the rest of their dive at
30 feet the entire profile charts at 90 feet on a
dive table.

COMPUTERS vs. TABLES
COMPUTERS vs. TABLES

COMPUTERS vs. TABLES
COMPUTERS vs. TABLES
•Diving Computers calculate a more accurate
profile. They use the same (or similar) algorithms
as the tables and simply perform those same
calculations several times a second. Going back
to the previous example, a Dive Computer would
take into account that only 2 minutes were spent
a 88 feet. It adjusts the no decompression dive
time remaining, thus allowing additional bottom
time.

COMPUTERS vs. TABLES
COMPUTERS vs. TABLES

COMPUTERS vs. TABLES
COMPUTERS vs. TABLES
•When used properly, diving computers are very
safe. Because they automatically read the exact
depth and duration at every point of the dive
they can potentially reduce diver error. They also
automatically time surface intervals as soon as a
diver surfaces. Again, providing more accurate
information which can benefit on repetitive dives.
Over the course of a dive vacation a computer
can safely add hours of available bottom time.

DIVE COMPUTER THEORY
DIVE COMPUTER THEORY
•OBJECTIVES:
•Have A basic understanding of the Decompression
Model utilized by Oceanic Dive Computers
•Have a basic understanding of Tissue Compartments
and how they are graphically represented on an
Oceanic Dive Computer

DECOMPRESSION MODEL
DECOMPRESSION MODEL
•Decompression theory can be trusted only as far as it
has been demonstrated by actual test dive data. In
1987 Diving Science and Technology (DSAT)
conducted a unique series of experiments.
Commissioned by the Professional Association of
Diving Instructors (PADI), these Doppler ultrasound
monitored human experiments conducted by Dr.
Michael Powell produced the most comprehensive
data set that exists for recreational divers to this day.
These data were used to validate the PADI
Recreational Dive Planner and are the basis of the
algorithm used in all Oceanic Personal Dive
Computers (PDCs).

DECOMPRESSION MODEL
DECOMPRESSION MODEL
•The programs within an Oceanic PDC simulate
the absorption of nitrogen into the body by using
a mathematical model. This model is merely a
way to apply a limited set of data to a large
range of experiences. The Dive Computer model
is based upon the latest research and
experiments in decompression theory.

DECOMPRESSION MODEL
DECOMPRESSION MODEL
•Still, using an Oceanic PDC, just as using the
dive tables, is no guarantee of avoiding
decompression sickness.
•Every diver’s physiology is different, and can
even vary from day to day. No machine can
predict how your body will react to a particular
dive profile.

MULTIPLE TISSUE TRACKING
MULTIPLE TISSUE TRACKING
•An Oceanic PDC tracks twelve tissue
compartments with halftimes ranging from 5 to
480 minutes. The Tissue Loading (Nitrogen) Bar
Graph provided on most Oceanic PDCs always
displays the controlling compartment that is the
only one important at that time.
•Think of the Tissue Loading (Nitrogen) Bar Graph
as twelve separate transparent displays laid on
top of one another. The tissue compartment that
has filled up fastest is the only one the viewer
can see from the top.

MULTIPLE TISSUE TRACKING
MULTIPLE TISSUE TRACKING
•At any particular point, one tissue compartment
may be absorbing nitrogen, while another that
was previously higher may be off-gassing.
•NOTE: This feature of the Decompression Model
is the basis of multilevel diving, one of the most
important contributions that an Oceanic PDC
offers you.

Diving with the VEO 100 Nx
Diving with the VEO 100 Nx

FEATURES & DISPLAYS
FEATURES & DISPLAYS
•OBJECTIVES:
•Be able to identify numeric and graphic displays of the
Veo 100 Nx
•Understand the function of the Control Button
•Identify and understand the information presented via
bar graphs
•Identify and understand low battery power condition
displays

FULL DISPLAY
FULL DISPLAY
•Each numeric and graphic
display represents a
unique piece of
information. It is
imperative that you
understand the formats,
ranges, and values of the
information represented to
avoid any possible
misunderstanding that
could result in error.

CONTROL BUTTON
CONTROL BUTTON
•The Control Button allows
you to select display
options and access
specific information when
you want to see it.
•It is also used to enter
settings.

TISSUE LOADING BAR GRAPH
TISSUE LOADING BAR GRAPH
•The Nitrogen Tissue
Loading Bar Graph
represents tissue loading
of nitrogen, showing your
relative no decompression
or decompression status.
•The Tissue Loading
(Nitrogen) Bar Graph
offers you a convenient
way to consistently
monitor how close you
are coming to the No
Decompression Limit.

TISSUE LOADING BAR GRAPH
TISSUE LOADING BAR GRAPH
•As your depth and
elapsed dive time
increase, segments will
add to the Graph, and as
you ascend to shallower
depths, the Bar Graph will
begin to recede,
indicating that additional
no decompression time is
allowed for multilevel
diving.