Suunto manual Push buttons of the D3

Any person who engages in any form of breathhold diving is in danger of shallow- water blackout (SWB) i.e. the sudden loss of consciousness caused by oxygen starvation.

Any breathhold 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 freediving has not been severe, there is little risk in diving after breathhold diving. However, the converse is more unknown and may increase significantly the risk of DCI. Therefore, FREEDIVING AFTER SCUBA DIVING IS NOT RECOMMENDED. You should avoid freediving and not exceed five meters [16 ft] for at least two hours after scuba diving.

Suunto also recommends you to be trained in freediving technique and physiol- ogy before conducting breathhold 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.

Fig. 2.1. The push buttons of the D3.

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