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).