Suunto HelO2 [26/64] Deep stops

WHEN CEILING AND STOP ARE

DISPLAYED, MAKE A ONE MINUTE

MANDATORY SAFETY STOP IN THE

DEPTH ZONE BETWEEN 6 M AND 3 M.

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. You should immediately descend to, or below,

the Mandatory Safety Stop ceiling depth. If you correct this situation at any time during

the dive, there are no effects on the decompression calculations for future dives.

WHEN CEILING AND STOP

ARE DISPLAYED, IMMEDIATELY

(WITHIN 3 MINUTES) DESCEND

TO OR BELOW CEILING.

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 that you prolong your surface interval time before your

next dive.

5.12. Deep stops

The most significant factor limiting the ascent is the ceiling depth. It is the maximum depth

a diver can ascend to before tissue pressures have decreased low enough. In addtion,

separate safety stops are used. Their purpose is to increase the safety margin even if

decreasing the tissue pressures does not require them. Such stops are safety stop when

surfacing and deep stops.

According to UHMS, deep stops are stops that occur deeper than the traditional decom-

pression model suggests. The purpose of deep stops is to slow down a long continuous

ascent and minimize microbubble formation and excitation.

While the Suunto Technical RGBM model is based on M-values, the use of deep stops

brings the model closer to the full RGBM model. The way of implementing deep stops is

conducted by Dr. Bruce Wienke.

If deep stop is broken it does not cause the dive computer to go into error mode. However

there is penalty applied to the following decompressions.

DURING DESCENT,

YOU ARE SHOWN

THAT A DEEPSTOP IS

NEEDED AT THE

DEPTH OF 25 M.

DURING ASCENT, YOU

ARE ADVISED TO MAKE A

DEEPSTOP AT 25 M FOR THE

DURATION SHOWN BY THE

TIMER (42 SEC. REMAINING).