Assertion: diver's foot | /r/HasProperty | 40 m
Facets:
Source sentences:
text: One of the more divisive subjects in technical diving concerns using compressed air as a breathing gas on dives below 130 feet (40 m).
text: The major worldwide recreational diver certification agencies consider 130 feet (40 m) to be the limit for recreational diving.
text: PADI defines technical diving as "diving other than conventional commercial or recreational diving that takes divers beyond recreational diving limits (130 feet (40 m)).
text: Technical dives may be defined as being dives deeper than about 130 feet (40 m) or dives in an overhead environment with no direct access to the surface or natural light.
text: Helitrox/triox proponents argue that the defining risk for air and nitrox diving depth should be nitrogen narcosis, and suggest that when the partial pressure of nitrogen reaches approximately 4.0 ATA, which occurs at about 130 feet (40 m) for air, helium is necessary to limit the effects of the narcosis.