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Breathing gas, mixture of nitrogen and oxygen
Nitrox refers to any gas mixture composed of nitrogen and oxygen (plus trace gases). It is usually used for mixtures that contain less than 78% nitrogen
Nitrox
Recreational diver training and certification agency
American Nitrox Divers International (or ANDI) was founded by Ed Betts and Dick Rutkowski in 1988. ANDI has since expanded to include offices in The United
American Nitrox Divers International
American_Nitrox_Divers_International
Diving beyond the scope of recreational diving
experience. The equipment involves breathing gases other than air or standard nitrox mixtures, and multiple gas sources. Most technical diving is done within
Technical_diving
Method of comparing decompression requirements for air and a given nitrox mix
different proportions to those in air, known as nitrox. The equivalent air depth, for a given nitrox mix and depth, is the depth of a dive when breathing
Equivalent_air_depth
Russian military rebreather for underwater and high altitude use
hinged cover. It has a small optional nitrox cylinder which can be clipped on its outside to convert it to nitrox mode. It contains one oxygen cylinder
IDA71
Mixing and filling cylinders with breathing gases for use when scuba diving
is the filling of diving cylinders with non-air breathing gases such as nitrox, trimix and heliox. Use of these gases is generally intended to improve
Gas_blending_for_scuba_diving
Recreational and technical scuba training and certification agency
The International Association of Nitrox and Technical Divers (IANTD) is a scuba diving organization concerned with certification and training in recreational
International Association of Nitrox and Technical Divers
International_Association_of_Nitrox_and_Technical_Divers
Swimming underwater, breathing gas carried by the diver
scientific use of nitrox in the NOAA Diving Manual. In 1985 IAND (International Association of Nitrox Divers) began teaching nitrox use for recreational
Scuba_diving
Breathing gas consisting of oxygen, helium and nitrogen
loop can be hyperoxic (meaning more oxygen than in air, as in enriched air nitrox) in shallow water, because the rebreather automatically adds oxygen to maintain
Trimix_(breathing_gas)
Origins and development of diving using breathing gas carried by the diver
scientific use of nitrox in the NOAA Diving Manual. In 1985 IAND (International Association of Nitrox Divers) began teaching nitrox use for recreational
History_of_scuba_diving
American pioneer in hyperbaric and diving medicine
training and safety including American Nitrox Divers International (ANDI), the International Association of Nitrox Divers (IAND) - which later became known
Dick_Rutkowski
Pioneering technical diver and author (1951–2023)
VAST Inc. contract took him to the Caribbean where he worked to develop nitrox and decompression procedures for their dive teams. It was here that Gilliam's
Bret_Gilliam
Techniques requiring specific equipment and procedures
wear diving helmets or full-face diving masks. The bottom gas can be air, nitrox, heliox or trimix; the decompression gases may be similar, or may include
Modes_of_underwater_diving
Safety concept in underwater diving
underwater diving activities such as saturation diving, technical diving and nitrox diving, the maximum operating depth (MOD) of a breathing gas is the depth
Maximum_operating_depth
Physiologist, aquanaut and researcher (1940–2017)
deep diving, and the use of nitrox as a breathing gas for diving. He is known for developing the widely used NOAA Nitrox I (32% O2/N2) and II (36% O2/N2)
John_Morgan_Wells
Diver certification agency
without harming it) Nitrox 2 – Advanced Nitrox Gas Blender 1 – (ISO 13293) covers Nitrox, Gas Blender 2 – (ISO 13293) covers Nitrox and Trimix, Intro Trimix
Professional Technical and Recreational Diving
Professional_Technical_and_Recreational_Diving
Type of diving rebreather used by the Royal Navy
for nitrox mode (which the Navy called "mixture"), and then the set was sometimes called CDMBA.[clarification needed] The Royal Navy was using nitrox from
Siebe_Gorman_CDBA
International organisation for underwater activities
Divers Nitrox Instructor Advanced Nitrox Instructor Nitrox Instructor Three Star Ice Diver Instructor Trimix Instructor Advanced Trimix Instructor Nitrox Gas
Confédération Mondiale des Activités Subaquatiques
Confédération_Mondiale_des_Activités_Subaquatiques
Recreational technical scuba training and certification agency
specializing in training and certification in technical diving and the safe use of nitrox and trimix. TSA was founded in Switzerland and has been active in Italy
Trimix_Scuba_Association
Toxic effects of breathing oxygen at high partial pressures
Recreational scuba divers commonly breathe nitrox containing up to 40% oxygen, while technical divers use pure oxygen or nitrox containing up to 80% oxygen to accelerate
Oxygen_toxicity
Underwater diving breathing gas supplied from the surface
masks and full-face diving masks. Breathing gases used include air, heliox, nitrox and trimix. Saturation diving is a mode of surface supplied diving in which
Surface-supplied_diving
German manufacturer of breathing equipment
for oxygen use at depths of up to 20 metres, and the DM40, designed for nitrox use at depths of up to 40 metres. The DM40 system used both an oxygen cylinder
Dräger_(company)
Military semi-closed circuit passive addition diving rebreather
The Interspiro DCSC is a semi-closed circuit nitrox rebreather manufactured by Interspiro of Sweden for military applications. Interspiro was formerly
Interspiro_DCSC
Equipment used by divers to facilitate decompression
("accelerated") by breathing an oxygen-rich "decompression gas" such as a nitrox blend or pure oxygen. The high partial pressure of oxygen in such decompression
Decompression_equipment
Tabulated data to facilitate safe diving ascents
on the RGBM model in 2001. NOAA Nitrox I, also known as EAN32, a nitrox blend with 32% oxygen by volume, and NOAA Nitrox II, or EAN36, with 36% oxygen are
Decompression_tables
Estimation of breathing gas mixtures and quantities required for a planned dive profile
nitrogen and oxygen is known as nitrox. The traces of argon and other atmospheric gases are considered to be unimportant. Nitrox is a mixture of nitrogen and
Scuba_gas_planning
Material
to as nitrox. FKMs are used because they have a lower probability of catching fire, even with the increased percentages of oxygen found in nitrox. They
FKM
Agencies which issue certification for competence in diving skills
Association des Moniteurs de la CMAS du Quebec CMAS code CAN/F05 ANDI - American Nitrox Divers International – Recreational diver training and certification agency
List of diver certification organizations
List_of_diver_certification_organizations
Gas mixture occasionally used by scuba divers for dry-suit inflation
The mixture is made with the same gas blending techniques used to make nitrox, except that for argox, the argon is added to the initial pure oxygen partial-fill
Argox
Recreational scuba and freediving training and certification agency
suit diving techniques and suit maintenance EAN Nitrox - planning dives with Nitrox and using Nitrox safely, including analyzing the mix before use. Decompression
Scuba_Schools_International
Technical diver training and certification agency
and David Sipperly after a split away from International Association of Nitrox and Technical Divers (IANTD) in 1993. The agency aimed to provide training
Technical Diving International
Technical_Diving_International
Pioneering technical and cave diver (1939–2022)
formed known as the International Association of Nitrox Divers or IAND, which was dedicated to teaching Nitrox to recreational divers. In 1992 Mount was named
Tom_Mount
Container to supply high pressure gas for diving operations
contains nitrox or a helium based gas. closed circuit rebreathers have an oxygen cylinder and a "diluent" cylinder, which contains air, nitrox or a helium
Diving_cylinder
Mechanism that controls the pressure of a breathing gas supply for diving
in cold water. Standard air regulators are considered to be suitable for nitrox mixtures containing 40% or less oxygen by volume, both by NOAA, which conducted
Diving_regulator
Storage vessel for oxygen
high pressure cylinders gas blending, for mixing breathing gases such as nitrox, trimix and heliox open-circuit scuba sets - mainly used for accelerated
Oxygen_tank
Semi-submersible offshore drilling rig
Breathing air Decompression gas Emergency gas supply Heliox Hydreliox Hydrox Nitrox Oxygen Travel gas Trimix Buoyancy and trim equipment Avelo diving system
Byford_Dolphin
Sports bike by Bajaj Auto
triple spark-ignition & liquid-cooled engine. It uses exhaust, and rear nitrox-charged mono-shock suspension. In 2024 Bajaj Updated the Pulsar NS Series
Bajaj_Pulsar_NS200
Polish technical and cave diver
1968) is a Polish technical and cave diver and International Association of Nitrox and Technical Divers (IANTD), Confédération Mondiale des Activités Subaquatiques
Krzysztof_Starnawski
English broadcaster and natural historian (born 1926)
Breathing air Decompression gas Emergency gas supply Heliox Hydreliox Hydrox Nitrox Oxygen Travel gas Trimix Buoyancy and trim equipment Avelo diving system
David_Attenborough
Planned hyperbaric exposure using a specified breathing gas as medical treatment
of inert gases and oxygenating injured tissues in comparison with air. Nitrox and Heliox mixtures are recommended by the US Navy for treatment gases at
Hyperbaric treatment schedules
Hyperbaric_treatment_schedules
Hazards associated with underwater diving
of diving days, number of dives in a repetitive series, last dive depth, nitrox use, and drysuit use. No significant associations with decompression sickness
List of diving hazards and precautions
List_of_diving_hazards_and_precautions
UK governing body of recreational diving
to Ellesmere Port, North West England. 1995: BSAC allows Nitrox diving and introduced Nitrox training. 1997, 20 May: BSAC was expelled from the Confédération
British_Sub-Aqua_Club
Special forces unit of the British Army
Breathing air Decompression gas Emergency gas supply Heliox Hydreliox Hydrox Nitrox Oxygen Travel gas Trimix Buoyancy and trim equipment Avelo diving system
Special_Air_Service
Crewed full ocean depth rated submersible
Breathing air Decompression gas Emergency gas supply Heliox Hydreliox Hydrox Nitrox Oxygen Travel gas Trimix Buoyancy and trim equipment Avelo diving system
DSV_Limiting_Factor
Gas used for human respiration
the dive. Diving using mixed gases is referred to as mixed gas diving. Nitrox is a mixture of oxygen and nitrogen, either by mixing oxygen with air, or
Breathing_gas
Umbrella organisation representing scuba diver training organisations in Europe
CB 2005004) American Nitrox Divers International (EUF CB 2005005) DSF (EUF CB 2005006) IANTD International Association of Nitrox and Technical Divers
European Underwater Federation
European_Underwater_Federation
Type of motorcycle
model was launched in 2007, which features a front disc brake, self-start, nitrox suspension, and black alloy wheels. The silver engine has also been powder-coated
Bajaj_Discover
Tactical scuba diver
because of the risk of seizure due to acute oxygen toxicity. The use of nitrox or mixed gas rebreathers can extend this depth range considerably, but this
Frogman
Scuba diving standards body
Introductory Scuba Experience, Supervised Diver, Open Water Diver, Enriched Air Nitrox Certification, Entry level Rescue Diver, Dive Supervisor, Assistant Instructor
World Recreational Scuba Training Council
World_Recreational_Scuba_Training_Council
Scuba set with variable-density buoyancy control
capacity of about 106 cubic feet of atmospheric pressure air or recreational nitrox. The fully charged set is slightly buoyant and lighter than the equivalent
Avelo_diving_system
Powered device for diver mobility and range extension
Encyclopedia (1st ed.). Miami Shores, Florida: International Association of Nitrox Divers. pp. 51–60. ISBN 978-0-915539-10-9. Rossier, Robert N. "Redefining
Diver_propulsion_vehicle
Diving mode and decompression technique
work of breathing, but at shallow depths saturation diving can be done on nitrox mixtures. Most of the physiological and medical aspects of diving to the
Saturation_diving
Disorder caused by dissolved gases forming bubbles in tissues
of diving days, number of dives in a repetitive series, last dive depth, nitrox use, and drysuit use. No significant associations with risk of decompression
Decompression_sickness
Abnormally high tissue carbon dioxide levels
Encyclopedia (1st ed.). Miami Shores, Florida: International Association of Nitrox Divers. pp. 279–286. ISBN 978-0-915539-10-9. Stapczynski J. S, "Chapter
Hypercapnia
Australian conservationist (1962–2006)
Breathing air Decompression gas Emergency gas supply Heliox Hydreliox Hydrox Nitrox Oxygen Travel gas Trimix Buoyancy and trim equipment Avelo diving system
Steve_Irwin
Exposure of tissues to abnormally high concentrations of oxygen
known as nitrox is used to reduce the risk of decompression sickness by substituting oxygen for part of the nitrogen content. Breathing nitrox can lead
Hyperoxia
Injury due to pressure difference between gas filled space and adjoining tissue
lung barotrauma are hyperbaric and normobaric oxygen, hyperbaric heliox or nitrox, isotonic fluids, anti-inflammatory medications, decongestants, and analgesics
Barotrauma
French diver training and certification agency
40 m with Trimix and is a diving officer for dives from 0–40 m with air/nitrox and 70 m with Trimix. The level E4 Moniteur fédéral 2e degré (MF2) or Moniteur
Fédération Française d'Études et de Sports Sous-Marins
Fédération_Française_d'Études_et_de_Sports_Sous-Marins
Breathing gas mixture experimentally used for very deep diving
oxygen Hydreliox – Breathing gas mixture of hydrogen, helium, and oxygen Nitrox – Breathing gas, mixture of nitrogen and oxygen Trimix – Breathing gas consisting
Hydrox_(breathing_gas)
Breathing gas mixed from helium and oxygen
Argox – Gas mixture occasionally used by scuba divers for dry-suit inflation Nitrox – Breathing gas, mixture of nitrogen and oxygen Hydreliox – Breathing gas
Heliox
Vietnamese assault rifle
Breathing air Decompression gas Emergency gas supply Heliox Hydreliox Hydrox Nitrox Oxygen Travel gas Trimix Buoyancy and trim equipment Avelo diving system
STV_rifle
Self-contained underwater breathing apparatus
of loop volume and lung volume remains constant.[citation needed] Until Nitrox, which contains more oxygen than air, was widely accepted in the late 1990s
Scuba_set
American professional aquanaut
Master Scuba Diver Trainer, an International Association of Nitrox and Technical Divers Nitrox Instructor, a Divers Alert Network Oxygen Instructor and a
Mark_Hulsbeck
Descending below the surface of the water to interact with the environment
wear diving helmets or full-face diving masks. The bottom gas can be air, nitrox, heliox or trimix; the decompression gases may be similar, or may include
Underwater_diving
Pioneering American deep-sea diver
Breathing air Decompression gas Emergency gas supply Heliox Hydreliox Hydrox Nitrox Oxygen Travel gas Trimix Buoyancy and trim equipment Avelo diving system
Amelia_Behrens-Furniss
Training process for people who do not dive at work
first aid on land General First aid Technical diving techniques: Using Nitrox as a bottom gas Analyzing proportion of oxygen in a breathing gas Calculating
Recreational_diver_training
French recreational diver training and certification agency
Mixed gas diving: ANMP created their own progression: through nitrox, advanced nitrox, basic trimix, trimix and rebreather. ANMP also offers seven specialties
Association nationale des moniteurs de plongée
Association_nationale_des_moniteurs_de_plongée
Electrochemical device for measuring oxygen partial pressure
surface supplied mixed gas diving to analyse the proportion of oxygen in a nitrox, heliox or trimix breathing gas before a dive. These cells are lead/oxygen
Electro-galvanic oxygen sensor
Electro-galvanic_oxygen_sensor
Closed or semi-closed circuit scuba
variants of some of their diving oxygen rebreathers (= what is now called "nitrox"): SCMBA from the SCBA (Swimmer Canoeist's Breathing Apparatus), and CDMBA
Diving_rebreather
Diving for the purpose of leisure and enjoyment
single nitrox mixture with an oxygen fraction not exceeding 40% for the planned dive, but this does not preclude constant oxygen partial pressure nitrox provided
Recreational_diving
Overview of and topical guide to underwater diving
operating in the very high frequency maritime mobile band Nitrox production – Methods of producing nitrox mixtures Membrane gas separation – Technology for splitting
Outline_of_underwater_diving
Techniques and procedures for safe decompression of divers
accelerated decompression for a relatively low risk of bubble formation. Nitrox mixtures and oxygen are the most commonly used gases for this purpose, but
Decompression_practice
NASA operations facility in Texas
Conkin J (2003). "Improved pulmonary function in working divers breathing nitrox at shallow depths". Undersea Hyperb Med Abstract. 30 (Supplement): 763–7
Johnson_Space_Center
Firearm firing gyroscopic rockets in the 1960s
Breathing air Decompression gas Emergency gas supply Heliox Hydreliox Hydrox Nitrox Oxygen Travel gas Trimix Buoyancy and trim equipment Avelo diving system
Gyrojet
Change in sea level due to gravity
Breathing air Decompression gas Emergency gas supply Heliox Hydreliox Hydrox Nitrox Oxygen Travel gas Trimix Buoyancy and trim equipment Avelo diving system
Tide
Australian anesthesiologist and cave diver (born 1964)
fatigue following 18 msw dry chamber dives breathing air or enriched air nitrox". Undersea & Hyperbaric Medicine. 30 (4): 285–291. PMID 14756231. Harris
Richard_Harris_(anaesthetist)
Pressure reduction and its effects during ascent from depth
D. Thalmann published the USN E-L algorithm and tables for constant PO2 Nitrox closed circuit rebreather applications, and extended use of the E-L model
Decompression_(diving)
Energy expended to inhale and exhale a breathing gas
the breathing mix to keep the combined density below 6 g/litre. On air or nitrox, maximum ventilation drops to about half at 30 m, equivalent to 4 bar absolute
Work_of_breathing
NASA astronaut and manager of Environmental Physiology Laboratory (born 1956)
verification in the Shuttle Avionics Integration Laboratory (SAIL) Development of nitrox diving to support training for the Hubble Space Telescope repair, and on
Michael_L._Gernhardt
U.S. Navy's special operations force
Breathing air Decompression gas Emergency gas supply Heliox Hydreliox Hydrox Nitrox Oxygen Travel gas Trimix Buoyancy and trim equipment Avelo diving system
United_States_Navy_SEALs
Swimming while inhaling through a snorkel
Biologie Marine. 59: 451–460. doi:10.21411/CBM.A.B05FC714. "Dive-Tech: TDI Nitrox, Helitrox, Trimix and technical diver training courses with instructor Mark
Snorkeling
American semiconductor company
Marvell's security-related products include its LiquidSecurity HSM Adapters and NITROX Cryptographic Offload Engines. Marvell's networking products include its
Marvell_Technology
American fabless semiconductor company
6, 2018. Cavium began selling security processors in late 2001 with the Nitrox line. The processor had support for features like IPsec, SSL, intrusion-detection
Cavium
Italian special forces diving unit
Subacquei - GOS) specialises in scuba diving with air to 60 m, oxygen to 12 m, nitrox to 54 m, heliox to 150 m, and to 300 m with a mini-submarine or a special
Comando Raggruppamento Subacquei e Incursori Teseo Tesei
Comando_Raggruppamento_Subacquei_e_Incursori_Teseo_Tesei
Mathematical model of tissue inert gas uptake and release with pressure change
(1986) ZH-L 16 or ZH-L 16 A (air, nitrox): The experimental set of parameters published in 1986. ZH-L 16 B (air, nitrox): The set of parameters modified
Bühlmann decompression algorithm
Bühlmann_decompression_algorithm
Marine services company for underwater operations
Breathing air Decompression gas Emergency gas supply Heliox Hydreliox Hydrox Nitrox Oxygen Travel gas Trimix Buoyancy and trim equipment Avelo diving system
Phoenix International Holdings
Phoenix_International_Holdings
Building structures in or adjacent to large bodies of water
Breathing air Decompression gas Emergency gas supply Heliox Hydreliox Hydrox Nitrox Oxygen Travel gas Trimix Buoyancy and trim equipment Avelo diving system
Marine_construction
Distinct layer of temperature change in a body of water
Breathing air Decompression gas Emergency gas supply Heliox Hydreliox Hydrox Nitrox Oxygen Travel gas Trimix Buoyancy and trim equipment Avelo diving system
Thermocline
American writer, botanist, and SCUBA and aviation enthusiast
Breathing air Decompression gas Emergency gas supply Heliox Hydreliox Hydrox Nitrox Oxygen Travel gas Trimix Buoyancy and trim equipment Avelo diving system
Fred_M._Roberts
Topics referred to by the same term
blending, the filling of diving cylinders with non-air breathing gases such as nitrox, trimix and heliox Tea blending, the process of blending different teas
Blending
English Tudor warship (1511–1545)
Breathing air Decompression gas Emergency gas supply Heliox Hydreliox Hydrox Nitrox Oxygen Travel gas Trimix Buoyancy and trim equipment Avelo diving system
Mary_Rose
Professional diving on industrial projects
Breathing air Decompression gas Emergency gas supply Heliox Hydreliox Hydrox Nitrox Oxygen Travel gas Trimix Buoyancy and trim equipment Avelo diving system
Commercial_diving
Portable apparatus to recycle breathing gas
variants of some of their diving oxygen rebreathers (= what is now called "nitrox"): SCMBA from the SCBA (Swimmer Canoeist's Breathing Apparatus), and CDMBA
Rebreather
Cloudiness of a fluid
Breathing air Decompression gas Emergency gas supply Heliox Hydreliox Hydrox Nitrox Oxygen Travel gas Trimix Buoyancy and trim equipment Avelo diving system
Turbidity
Breathing gas mixture of hydrogen, helium, and oxygen
Hydrox – Breathing gas mixture experimentally used for very deep diving Nitrox – Breathing gas, mixture of nitrogen and oxygen Trimix – Breathing gas consisting
Hydreliox
Canadian astronaut, circled the Moon in 2026 (born 1976)
Breathing air Decompression gas Emergency gas supply Heliox Hydreliox Hydrox Nitrox Oxygen Travel gas Trimix Buoyancy and trim equipment Avelo diving system
Jeremy_Hansen
Scuba diver certification
International (SSI). Other agencies (e.g., The International Association of Nitrox and Technical Divers) offer similar programs under other names, such as
Master_Scuba_Diver
2006 animal encounter accident
Breathing air Decompression gas Emergency gas supply Heliox Hydreliox Hydrox Nitrox Oxygen Travel gas Trimix Buoyancy and trim equipment Avelo diving system
Death_of_Steve_Irwin
Italian Goa trance band
could realize some of the best Goa trance tracks ever. Their fourth album, Nitrox (2001), is the result of this evolution and worked really well on the dance-floors
Etnica
Rigid head enclosure for underwater diving
an oxygen cylinder and an air cylinder for the gas supply, producing a nitrox mixture, for depths up to 40 m. The Siebe Gorman Mine Recovery Type Self-Contained
Diving_helmet
travel, tourism, insurance
NITROX
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travel, tourism, insurance