Editing Nitrogen narcosis (section)

== Footnotes ==
{{Reflist |group="FN" |refs=
<ref name="Krypton">Value for Krypton from 4th Edition, p.&nbsp;176.</ref>
<ref name="DeepAir">A number of technical diving agencies, such as [[Technical Diving International|TDI]] and [[International Association of Nitrox and Technical Divers|IANTD]] teach "extended range" or "deep air" courses which teach diving to depths of up to {{convert|55|m|ft|abbr=on}} without helium.</ref>
<ref name="EuTraining">[[British Sub-Aqua Club|BSAC]], [[Sub-Aqua Association|SAA]] and other European training agencies teach recreational diving to a depth limit of {{convert|50|m|ft|abbr=on}}.</ref>
}}