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5. “No Fly” Symbol—If less than 24 hours has passed since a
previous dive, the IQ-600 will display a “No Fly” symbol
while in Surface Mode.
Experts recommend divers wait at least 24
hours following any dive before flying in
an aircraft or driving to altitude.
Failure
to allow sufficient surface interval
before doing so may substantially
increase the risk of Decompression
Illness (DCI).
6.
Surface Interval—If your IQ-600 calculates that there is residual
nitrogen present from previous dives, it will also display up to 24
hours of Surface Interval Time (SURF T.) that have elapsed since
ascending, and a symbolic representation of the overall quantity
present on its Residual Nitrogen Bar Graph. The format your
IQ-600 uses to display Surface Interval Time (SURF T.) is
HOURS:MINUTES.
7.
Residual Nitrogen Bar Graph—This is a row of nine
pixels that represents the overall saturation of body tissues
with nitrogen. When all nine pixels appear under water, it
means you have reached (or exceeded) the No-Decompres-
sion Limit (NDL). On the surface, fewer than nine pixels
should appear, and the number of pixels appearing should
diminish over time—as the level of excess nitrogen present in
your system diminishes as your Surface Interval Time passes.
