SUUNTO Stinger - Manual (Page 38)

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You must not ascend shallower than 3 m [10 ft] with
the Mandatory Safety Stop warning on. If you ascend
above the Mandatory Safety Stop ceiling, a downward
pointing arrow will appear and a continuous beeping
starts (Fig. 3.14.). You should immediately descend to,
or below, the Mandatory Safety Stop ceiling depth. If
you correct this situation at any time during that dive,
there are no affects on the decompression calculations
for future dives.
If you continue to violate the Mandatory Safety Stop,
the tissue calculation model is affected and the dive
computer shortens the available no-decompression time
for your next dive. In this situation, it is recommended
to prolong your surface interval time before your next
dive.
Fig. 3.14. Violated Mandatory
Safety Stop. Downward pointing
arrow and an audible alarm
indicate you should descend to
ceiling zone.