SUUNTO D6 - Manual (Page 53)

WHEN STOP IS DISPLAYED,
MAKE A RECOMMENDED SAFETY
STOP FOR 3 MINUTES.
NOTE The Recommended Safety Stop, as the name implies, is
recommended. If it is ignored, there is no penalty applied to the
following surface intervals and dives.
5.10.2. Mandatory Safety Stops
When the ascent rate exceeds 12 m/40 ft per minute momentarily, or 10 meters/33ft
per minute continuously, the microbubble build-up is predicted to be more than is
allowed for in the decompression model. When the ascent rate exceeds 10 m/33 ft
per minute continuously for more than 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.
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