SUUNTO Zoop - Manual (Page 41)

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• 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 remem-
ber 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 this case it will be 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.
WARNING NEVER ASCEND ABOVE THE CEILING! You must not ascend above
the ceiling during your decompression. In order to avoid doing so by
accident, you should stay somewhat below the ceiling.