Suunto D4i - Mandatory Safety Stops

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WHEN STOP IS DISPLAYED,
MAKE A RECOMMENDED SAFETY
STOP FOR 3 MINUTES.
NOTE
The Recommended Safety Stop, as the name implies, is recom-
mended. If it is ignored, there is no penalty applied to the following
surface intervals and dives.
5.11.2. Mandatory Safety Stops
When the ascent rate exceeds 10 m/33 ft per minute continuously for more than five
(5) seconds, the microbubble build-up is predicted to be more than is allowed for in
the decompression model. The Suunto RGBM calculation model responds to this by
adding a Mandatory Safety Stop to the dive. The time of this Mandatory Safety Stop
depends on the severity of the ascent rate excess.
The STOP sign is shown in the display and when you reach the depth zone between
6 m and 3 m/20 ft and 10 ft, the CEILING label, ceiling depth, and the calculated Safety
Stop time also appear in the display. Wait until the Mandatory Safety Stop warning
disappears. The total length of the Mandatory Safety Stop time depends on the seri-
ousness of the ascent rate violation.
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