SUUNTO HELO2 - Manual (Page 30)

5.3. Emergency ascents
Before you dive, you must have the dive plan created with the Suunto Dive Planner
printed out on a slate. You must also have a back-up plan for lost gases. In the unlikely
event that the dive computer malfunctions during a dive, start using an alternative
depth gauge and timer and following the ascent schedule and gas switches that are
on the slate. If you dive using only air, follow these steps:
1.
Assess the situation calmly and then move promptly to less than 18 m/60 ft.
2. At 18 m/60 ft, slow down your ascent rate to 10 m/33 ft per minute and move to
a depth between 3 and 6 m/10 and 20 ft.
3. Stay there for as long as your gas supply will safely allow. After reaching the
surface, do not dive for at least 24 hours.
In the event that the dive computer functions but a required gas is not available, you
can use your diving partner's gas, which is set as a secondary gas on your dive com-
puter. Displayed ASC TIME is not correct, but the decompressions are calculated
correctly.
In the event that a required gas is not available at all, decompress for as long as you
can by using the next most suitable gas that has the highest oxygen content. Notice
that the oxygen content should be low enough to not violate the maximum partial
pressure of oxygen (PO
2
).
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