Suunto Vyper2 [28/55] Ceiling ceiling zone floor and decompression range
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Suunto Vyper2 [28/55] Ceiling ceiling zone floor and decompression range

Suunto Vyper2 [28/55] Ceiling ceiling zone floor and decompression range
If you exceed the no-decompression limits on a dive, the dive computer will provide the
decompression information required for ascent. After this, the instrument will continue to
provide subsequent interval and repetitive dive information.
Rather than requiring you to make stops at fixed depths, the dive computer lets you
decompress within a range of depths (continuous decompression).
The ascent time (ASC TIME) is the minimum amount of time needed to reach the surface
in a decompression dive. It includes:
•
the time needed to ascend to the ceiling at an ascent rate of 10 m per minute/33 ft per
minute. The ceiling is the shallowest depth to which you should ascend
•
the time needed at the ceiling
•
the time needed at the Mandatory Safety Stop (if any)
•
the time needed to reach the surface after the ceiling and Safety Stops have been
completed
WARNING
YOUR ACTUAL ASCENT TIME MAY BE LONGER THAN
DISPLAYED BY THE INSTRUMENT! The ascent time will increase
if you:
•
remain at depth
•
ascend slower than 10 m/33 ft per minute
•
make your decompression stop deeper than at the ceiling
These factors will also increase the amount of air required to reach
the surface.
Ceiling, ceiling zone, floor and decompression range
When in decompression, it is important that you understand the meaning of ceiling, floor,
and decompression range.
•
The ceiling is the shallowest depth to which you should ascend when in decompression.
At this depth, or below, you must perform all stops
•
The ceiling zone is the optimum decompression stop zone. It is the zone between the
minimum ceiling and 1.8 m/6 ft below the minimum ceiling
•
The floor is the deepest depth at which the decompression stop time will not increase.
Decompression will start when you pass this depth during your ascent
•
The decompression range is the depth range between the ceiling and floor. Within this
range, decompression takes place. However, it is important to remember that the
decompression will be very slow at, or close to, the floor
The depth of the ceiling and floor will depend on your dive profile. The ceiling depth will
be fairly shallow when you enter the decompression mode, but if you remain at depth, it
will move downward and the ascent time will increase. Likewise, the floor and ceiling may
change upwards while you are decompressing.
When conditions are rough, it may be difficult to maintain a constant depth near the surface.
In such cases, it is more manageable to maintain an additional distance below the ceiling,
to make sure that the waves do not lift you above the ceiling. Suunto recommends that
decompression takes place deeper than 4 m/13 ft, even if the indicated ceiling is shallower.
NOTE
It will take more time and more air to decompress below the ceiling
than at the ceiling.
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