5.5. Free diving
Free diving, and particularly Free diving in combination with scuba diving, may present
risks that have not been researched and are not commonly known.
Anyone who engages in any form of breath hold diving is in danger of shallow-water
blackout (SWB), that is, the sudden loss of consciousness caused by oxygen starvation.
Any breath hold diving results in some nitrogen build-up in the blood and other fast
tissues. Due to the short time spent at depth, this build-up is generally not significant.
Therefore, provided the effort involved in Free diving has not been severe, there is
little risk in diving after breath hold diving. However, the reverse is more unknown and
may significantly increase the risk of DCI. Therefore, FREE DIVING AFTER SCUBA
DIVING IS NOT RECOMMENDED. You should avoid Free diving, and not exceed 5
m/16 ft, for at least two hours after scuba diving.
WARNING
Suunto also recommends that you receive training in Free diving
techniques and physiology before conducting breath hold dives.
No dive computer can replace the need for proper dive training.
Insufficient or improper training may cause a diver to commit errors
that may lead to serious injury or death.
5.6. Audible and visual alarms
The dive computer features audible and visual alarms that advise when important
limits are approached or that prompt you to acknowledge preset alarms. The table
below describes the different alarms and their meanings.
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