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Safety concept in underwater diving
diving, technical diving and nitrox diving, the maximum operating depth (MOD) of a breathing gas is the depth below which the partial pressure of oxygen (pO2)
Maximum_operating_depth
Measures of a submarine's ability to operate underwater
design depth. Also known as the maximum operating depth (or the never-exceed depth), this is the maximum depth at which a submarine is allowed to operate under
Submarine_depth_ratings
Class of nuclear-powered fast attack submarines of the United States Navy
maximum operating depth of the Los Angeles class as 650 ft (200 m), while Patrick Tyler, in his book Running Critical, suggests a maximum operating depth
Los_Angeles-class_submarine
Australian conservationist (1962–2006)
fronted an advertising campaign for The Ghan in 2003, a passenger train operating between Adelaide, Alice Springs, and Darwin. A Pacific National NR class
Steve_Irwin
Toxic effects of breathing oxygen at high partial pressures
calculate a maximum operating depth for oxygen-rich breathing gases, and cylinders containing such mixtures should be clearly marked with that depth. The risk
Oxygen_toxicity
Acoustic sensing method
sonars operated at a relatively high frequency of 20–30 kHz, to achieve directionality with reasonably small transducers, with typical maximum operational
Sonar
Set of detailed instructions to assist in workplace safety
(documented as standard operating procedures) used in any manufacturing process that could affect the quality of the product. Standard Operating Procedures are
Standard_operating_procedure
Diving mode and decompression technique
both upwards and downwards (mixed excursion). The depth range between maximum and minimum excursion depth is called the excursion range or excursion window
Saturation_diving
Semi-submersible offshore drilling rig
(221 ft) and depth of 36.6 metres (120 ft). It had a maximum drilling depth of 6.1 kilometres (3.8 mi), and it could operate at a water depth of 460 metres
Byford_Dolphin
Gas used for human respiration
shallower maximum operating depth than with conventional air). Trimix is a mixture of oxygen, nitrogen, and helium and is often used at depth in technical
Breathing_gas
British ocean liner (1907–1915)
boilers (which fitted the forward space where the ship narrowed), operating at a maximum 195 pounds per square inch (1,340 kPa) and containing 192 individual
RMS_Lusitania
Disorder caused by dissolved gases forming bubbles in tissues
It may happen when leaving a high-pressure environment, ascending from depth, or ascending to altitude. A closely related condition of bubble formation
Decompression_sickness
Crewed full ocean depth rated submersible
Factor's port thruster group. The vessel is certified by DNV for a maximum dive depth of 11,000 m (36,000 ft), exceeding that of the Challenger Deep, the
DSV_Limiting_Factor
British volunteer cave diver who specialises in rescues
how's that?" In 2004, Volanthen and Stanton set a record for the greatest depth achieved in a British cave, diving 76 m (249 ft) at Wookey Hole in Somerset
John_Volanthen
Change in sea level due to gravity
heights and times. To calculate the actual water depth, add the charted depth to the published tide height. Depth for other times can be derived from tidal curves
Tide
French oceanographer and author (1910–1997)
Embiez islands in Var, with Philippe Tailliez and Frédéric Dumas, using a depth-pressure-proof camera case developed by mechanical engineer Léon Vèche,
Jacques_Cousteau
Breathing gas, mixture of nitrogen and oxygen
teach the use of two depth limits to protect against oxygen toxicity. The shallower depth is called the "maximum operating depth" and is reached when
Nitrox
Medical condition of lack of oxygen in the tissues
pressures due to altitude, by breathing hypoxic breathing gas at an unsuitable depth, by breathing inadequately re-oxygenated recycled breathing gas from a rebreather
Hypoxia_(medicine)
Swimming underwater, breathing gas carried by the diver
risk of oxygen toxicity, which becomes unacceptable below the maximum operating depth of the mixture. To displace nitrogen without the increased oxygen
Scuba_diving
Organ system for circulating blood in animals
which specialise in the heart, and cardiothoracic surgeons specialise in operating on the heart and its surrounding areas. Vascular surgeons focus on disorders
Circulatory_system
Japanese manned suicide torpedoes used by the Imperial Navy in World War II
Kerosene and oxygen Maximum range: 78 km (42 nmi) Cruising speed: 22 km/h (12 kn) Maximum speed: 56 km/h (30 kn) Maximum operating depth: 80 m (260 ft) Number
Kaiten
British cave diver who specialises in rescues
seriously." In 2004 Stanton and Volanthen set a world record for greatest depth achieved in a British cave, cave diving 76 m (249 ft) at Wookey Hole in
Rick_Stanton
Scuba cave diving incident in South Australia
depth of about 80 metres (260 ft), and another to the east reaches a maximum depth of 124 metres (407 ft). Because of the size of the hole and the height
1973 Mount Gambier cave diving accident
1973_Mount_Gambier_cave_diving_accident
Pirate Blackbeard's ship
uncertain, and there is no record of her actions prior to 1710 when she was operating as a French privateer as La Concorde. Surviving features of the ship's
Queen_Anne's_Revenge
Medical treatment at raised ambient pressure
or pits. The operating pressure depends on the application. Chambers used for clinical hyperbaric oxygen therapy commonly have a maximum allowable working
Hyperbaric_medicine
Special forces unit of the Royal Navy
as operating behind enemy lines destroying lines of communication, installations and gathering intelligence. During the Korean War the SBS operated from
Special_Boat_Service
Topics referred to by the same term
subculture Mod revival, late 1970s Honour Moderations, Oxford exams Maximum operating depth in scuba diving Mod Cup, a shinty trophy A module in modular scheduling
Mod
Search for a missing Boeing 777 in the southern Indian Ocean
was aborted because the sea bed was considerably deeper than the maximum operating depth of Bluefin. Scanning subsequently resumed and after covering 42
Search for Malaysia Airlines Flight 370
Search_for_Malaysia_Airlines_Flight_370
Tactical scuba diver
rebreathing equipment will stay within a depth limit of 20 feet (6.1 m) with limited deeper excursions to a maximum of 50 feet (15 m) because of the risk
Frogman
Underwater diving using self contained breathing gas recycling apparatus
very shallow maximum operating depth limit, due to oxygen toxicity considerations. Active addition SCRs vary in complexity, but all operate with a breathing
Rebreather_diving
Special forces unit of the Australian Army
March 2002. During the operation SASR teams were to provide on-location, in-depth operational intelligence and reconnaissance after they infiltrated the Shahi-Kot
Special_Air_Service_Regiment
Narcotic effects of respiratory nitrogen
is a reversible alteration in consciousness that occurs while diving at depth. It is caused by the anesthetic effect of certain gases at high partial
Nitrogen_narcosis
USMC deep reconnaissance unit
understood that his recon Marines would be operating 50 to 150 miles away from their littoral or operating area, or from any naval support. In order to
United States Marine Corps Force Reconnaissance
United_States_Marine_Corps_Force_Reconnaissance
Breathing gas consisting of oxygen, helium and nitrogen
Lowering the oxygen content of a breathing gas mixture increases the maximum operating depth and duration of the dive before which oxygen toxicity becomes a
Trimix_(breathing_gas)
Underwater diving to a depth beyond the norm
Deep diving is underwater diving to a depth beyond the normal range accepted by the associated community. In some cases this is a prescribed limit established
Deep_diving
Australian technical diver (1954–2005)
descended to a depth of 270 metres (890 ft) at Bushman's Hole, South Africa, breaking the following records: Depth on a rebreather Depth in a cave on a
Dave_Shaw
US government scientific agency
Satellite, Data, and Information Service (NESDIS) was created by NOAA to operate and manage the US environmental satellite programs, and manage NWS data
National Oceanic and Atmospheric Administration
National_Oceanic_and_Atmospheric_Administration
Cuban freediver also known as "Pipin"
where he established his first known world record of 112 meters (367 ft) depth in November 1989. Shortly thereafter he defected to Italy and later migrated
Francisco_Ferreras
French world record-setting freediver
Lauderdale, Audrey Mestre broke the female world record by free diving to a depth of 125 meters (410 ft) on a single breath of air.[citation needed] A year
Audrey_Mestre
Articulated pressure-resistant anthropomorphic housing for an underwater diver
factors affecting design are the ambient hydrostatic pressure of the maximum operating depth, and ergonomic considerations regarding the potential range of
Atmospheric_diving_suit
Diving in water-filled caves
available. Where the depth or other constraints prevent divers from exploring in person, tethered and untethered remotely operated underwater vehicles
Cave_diving
Submersible that traveled to the Challenger Deep
the submersible to the bottom of the New Britain Trench, reaching a maximum depth of 8,221 m (26,972 ft). There, he found a wide plain of loose sediment
Deepsea_Challenger
South African diver
by the high work-rate of breathing at depth. Two weeks after Dreyer's death, Theo hired a small, remotely operated sub used by the De Beers mining company
Deon_Dreyer
Pressure of a component gas in a mixture
determines the maximum operating depth of a gas mixture. Narcosis is a problem when breathing gases at high pressure. Typically, the maximum total partial
Partial_pressure
Closed or semi-closed circuit scuba
oxygen and inert components. A gas mix which has a maximum operating depth that is safe for the depth of the dive being planned, and which will provide
Diving_rebreather
Italian freediver (born 1992)
On 18 October 2019, Zecchini became the first woman to have reached a depth of −100m exclusively with the use of her arms (free immersion), during the
Alessia_Zecchini
Injury due to pressure difference between gas filled space and adjoining tissue
volume during ascent. A scuba or surface-supplied diver breathing gas at depth from underwater breathing apparatus fills their lungs with gas at an ambient
Barotrauma
Hyperbaric pressure vessel for human occupancy used in diving operations
maximum working pressure. Valves are generally duplicated inside and outside and are labelled to avoid confusion. It is usually possible to operate a
Diving_chamber
Chamber for transporting divers vertically through the water
diving bell is a rigid chamber used to transport divers from the surface to depth and back in open water, usually for the purpose of performing underwater
Diving_bell
Exposure of tissues to abnormally high concentrations of oxygen
partial pressure of oxygen in any given gas mixture will increase with depth. Atmospheric air becomes hyperoxic during the dive, and a hyperoxic gas
Hyperoxia
Tethered underwater mobile device operated by a remote crew
underwater machines that are often used to explore the ocean depth while being operated by people at the surface, usually from a control room. ROVs are
Remotely operated underwater vehicle
Remotely_operated_underwater_vehicle
Vascular blockage by air bubbles
in. This is one reason why surgeons must be particularly careful when operating on the brain, and why the head of the bed is tilted down when inserting
Air_embolism
Polish special forces unit
missions. On 27 June 1997, during Operation "Little Flower", a mixed team operating under the authority of the International Criminal Tribunal for the former
GROM_Military_Unit
Retired US Navy officer and professor of oceanography (born 1942)
and his team discovered they had imploded from the immense pressure at depth. It littered thousands of pieces of debris all over the ocean floor. Following
Robert_Ballard
First ironclad of the US Navy, 1861–1862
discovered almost 111 years after sinking, near Cape Hatteras at 230 feet (70 m) depth at coordinates 35°0′6″N 75°24′23″W / 35.00167°N 75.40639°W / 35.00167;
USS_Monitor
American cave and deep diving pioneer and record breaker
perhaps to sort out gas issues. His wrist-mounted dive computer read a maximum depth of 906 feet (276 m). The cause of Exley's death could not be determined
Sheck_Exley
Mixing and filling cylinders with breathing gases for use when scuba diving
risk of oxygen toxicity, which becomes unacceptable below the maximum operating depth of the mixture. To displace nitrogen without the increased oxygen
Gas_blending_for_scuba_diving
US Marine Corps special forces unit
amphibious light infantry warfare, particularly in landing in rubber boats and operating behind the lines. "Edson's" Raiders of 1st Marine Raiders Battalion and
Marine_Raider_Regiment
Distinct layer of temperature change in a body of water
that is not affected by season and lies below the yearly mixed layer maximum depth. Thermoclines can also be observed in lakes. In colder climates, this
Thermocline
Reconnaissance assets of Marine Air-Ground Task Force
are conducted by Marine Recon units are characterized by its degree in depth of penetration. This greatly increases the mission time, risk, and support
United States Marine Corps Reconnaissance Battalions
United_States_Marine_Corps_Reconnaissance_Battalions
American marine biologist and lecturer
dive, untethered, to the sea ocean floor near Oahu. She set the women's depth record of 381 metres (1,250 ft) which still holds to date. In 1979 she also
Sylvia_Earle
Diving beyond the scope of recreational diving
mixture and will also be marked with the maximum operating depth and if applicable, minimum operating depth. Technical diving can be done using air as
Technical_diving
Crewed deep-ocean research submersible
completed sea trials and was certified for operating down to 6,500 meters. As of 2024, Alvin is in active service, operated by the Woods Hole Oceanographic Institution
DSV_Alvin
Facility for supporting saturation diving projects
position. Heave compensation gear may be used to maintain a constant operating depth in a seaway. A decompression/recompression chamber may be included
Saturation_diving_system
Italian naval commando frogman unit of the Fascist era
electric motor moved the maiale at 2–3 nmi (3.7–5.6 km; 2.3–3.5 mi) at a maximum depth of 50 ft (15 m). At the target the crew detached a 6 ft (1.8 m)-long
Decima_Flottiglia_MAS
American astronaut and aquanaut (1925–2013)
ocean floor in SEALAB II at a depth of 205 feet (62 m) about 3,000 feet (910 m) off the coast of California. The depth required a cabin gas mixture of
Scott_Carpenter
Firearm firing gyroscopic rockets in the 1960s
flight like an unpowered bullet. A bullet has maximum kinetic energy at the muzzle; a rocket has maximum kinetic energy immediately after its fuel is expended
Gyrojet
Portable apparatus to recycle breathing gas
cylinder. Before a dive with such a set, the diver had to know the maximum or working depth of his dive, and how fast his body used his oxygen supply, and
Rebreather
Deaths occurring while scuba diving or as a consequence of scuba diving
buoyancy control, equipment misuse, entrapment, rough water conditions, scuba depth record attempts, and pre-existing health problems. Some fatalities are inevitable
Scuba_diving_fatalities
Breathing gas mixed from helium and oxygen
gas diving. The proportion of oxygen in a diving mix depends on the maximum depth of the dive plan, but it is often hypoxic and may be less than 10%.
Heliox
Ship used as a floating base for professional diving projects
relative movement through the splash zone, and heave compensation to minimise depth variation of the bell during the dive. Accommodations must be provided for
Diving_support_vessel
Self-propelled deep-diving crewed submersible
International Hydrodynamics of Vancouver in British Columbia with a maximum operating depth of 2,000 metres (1.2 mi) capable of dive durations of 7 to 10 hours
Deep-submergence_vehicle
German manufacturer of breathing equipment
approximately 15 kg Gas supply cylinder: 4 litre, 200 bar (standard) Diving depth: 6 msw (100% oxygen) 22 msw (EAN 50) 30 msw (EAN 40) 40 msw (EAN 32) Dive
Dräger_(company)
Cylindrical container for storing pressurised gas
group of cylinders on a lifting frame with no functional connections. The maximum combined cylinder volume for a bundle is 3000 litres for non-toxic gases
Gas_cylinder
Scientific study of the ocean
its surfaces and of the animals that fishermen brought up in nets, though depth soundings by lead line were taken. The Portuguese campaign of Atlantic navigation
Oceanography
Military Engineers of the British Army
Engineers in a variety of roles, including the Submarine Mining Service operating the boats required to tend the submarine mine defences that protected
Royal_Engineers
British defense industry manufacturing company
dual mode oxygen or semi-closed circuit mixed gas rebreather with maximum operating depth normally limited to 24 metres, but can be set to 55 metres, which
Cobham_Limited
Descending below the surface of the water to interact with the environment
methods to this day. Following Haldane's recommendation, the maximum safe operating depth for divers was extended to 61 metres (200 ft). The US Navy continued
Underwater_diving
Cloudiness of a fluid
disk is lowered into the water until it can no longer be seen; the depth (Secchi depth) is then recorded as a measure of the transparency of the water (inversely
Turbidity
Free-diving self-propelled deep-sea submersible
the Mariana Trench in the Pacific Ocean. The onboard systems indicated a depth of 37,800 ft (11,521 m) but this was later corrected to 35,813 ft (10,916
Bathyscaphe
Instrument to calculate decompression status in real time
available to warn the diver when exceeding the no-stop limit, the maximum operating depth for the breathing gas mixture, the recommended ascent rate, decompression
Dive_computer
Duplication of critical components to increase reliability of a system
using at least two different types of each of the following processors, operating systems, software, sensors, types of actuators (electric, hydraulic, pneumatic
Redundancy_(engineering)
Russian freediver (born 1987)
a pool with a monofin on a single breath. Since then, he has focused on depth disciplines and competing in open water. In 2012, he set a world record
Alexey_Molchanov
Diver who remains underwater for 24 hours or more
After sinking, the boat came to rest upside-down on the sea floor at a depth of 30 m (98 ft); eleven crew members perished. As the Jascon-4 filled with
Aquanaut
Submerged ridge of rock, coral or other material
Reefs may be classified in terms of their origin, geographical location, depth, and topography. For example a tropical coral fringing reef, or a temperate
Reef
Underwater diving without breathing apparatus
the competitor at somewhere around 1/3 to 1/4 of the target depth, usually with a maximum of 30m. The second will meet them about 10m shallower, and a
Freediving
Austrian freediver and world record holder
world record champion, and "the deepest man on earth" having dived to a depth of 253.2 metres (831 feet). Nitsch has held 33 world records across eight
Herbert_Nitsch
Russian multiple world record holding freediver (1962–2015)
giving a private lesson dive near Formentera, Spain. She went down to a depth of 40 metres (131 ft.), not as deep as normal; but, caught by a current
Natalia_Molchanova
Swimming while inhaling through a snorkel
impossible to pinch the nose if needed to equalize pressure at greater depth. Trained scuba divers are likely to avoid such devices, however, snorkel
Snorkeling
Instrument that indicates depth below a reference surface
At greater depths, it becomes inaccurate. The maximum depth cannot be recorded with this type of depth gauge, and accuracy is strongly affected by temperature
Depth_gauge
Technical diving safety philosophy
decompression plan. Cylinders are marked with the Enriched Air Percentage, maximum operating depth (MOD) in a clear and easily identifiable manner, and time/date
Doing_It_Right_(scuba_diving)
Submersible used for rescue of people from disabled submarines and submersibles
24 people at a time at depths of up to 600 m (1,969 ft). Their maximum operating depth is 1,500 m (4,921 ft). Power is provided by two large batteries
Deep-submergence rescue vehicle
Deep-submergence_rescue_vehicle
Copper helmet with rubberised canvas diving suit and weighted boots
depth - feet or metres of water column - which would provide the supervisor with a reasonable indication of diver depth. Originally manually operated
Standard_diving_dress
Manned wet submersible for deploying naval special forces
Navy SEALs and their equipment for special operations missions. It is operated by SEAL Delivery Vehicle Teams. The SDV, which has been in continuous service
SEAL_Delivery_Vehicle
Breathing gas mixture experimentally used for very deep diving
mixtures to specification InDEPTH (4 March 2020). "Playing with Fire: Hydrogen as a Diving Gas". InDepth. Retrieved 2023-09-08. InDEPTH (31 May 2023). "N=1:
Hydrox_(breathing_gas)
British-Caymanian-American freediver
overall "No Limit" freediving record (greater than the men's record) with a depth of 525 feet (160 m), which is still the women's world record for NLT (No
Tanya_Streeter
Abnormally high tissue carbon dioxide levels
{P_{et_{CO_{2}}}}} rose markedly with exertion even when the divers breathed air at a depth of only a few feet. A variety of reasons exist for carbon dioxide not being
Hypercapnia
Series of Chinese remotely operated underwater vehicles
Specifications: Maximum operating depth: 600 meters The JTD-01 "Deep Eel I" is a salvage, drilling, and pipe-laying robot. It has a maximum operating depth of 200
SJT-class_ROUV
Garment worn to provide thermal protection while wet
The type of the suit depends upon the temperature of the water and the depth of the planned dive. The difference between a wetsuit and a dry suit is
Wetsuit
Experimental underwater habitats developed by the United States Navy
Sea at a depth of 61 m (200 ft) for one day on September 6, 1962. Cousteau's habitats included Conshelf I, with a 2-person crew at a depth of 10 m (33 ft)
SEALAB
MAXIMUM OPERATING-DEPTH
MAXIMUM OPERATING-DEPTH
Boy/Male
Arabic, Muslim
Method; Way; Mode; Manner; Operation; Process
Boy/Male
Latin
Greatest.
Boy/Male
American, Australian, Chinese, French, German, Greek, Latin, Swedish
Greatest
Boy/Male
Latin French
Greatest.
Boy/Male
African, Arabic
Far
Male
Italian
Italian form of Latin Maximus, MASSIMO means "the greatest."
Boy/Male
Bengali, Gujarati, Hindu, Indian, Jain, Kannada, Malayalam, Marathi, Sanskrit
Plenty; Maximum; Intelligent; Young and Dynamic; Earth
Boy/Male
American, Australian, Chinese, Danish, French, German, Latin, Swedish
The Greatest; Form of Maximilian; Great; The Greatest Rival
Boy/Male
Latin
Greatest.
Boy/Male
Russian American
The greatest.
Boy/Male
Arabic, French, Muslim
Lucky
Boy/Male
American, Australian, French, Latin
Greatest
Boy/Male
Italian American
The greatest.
Male
Russian
(МакÑим) Variant spelling of Russian Maksim, MAXIM means "the greatest." Compare with another form of Maxim.
Male
French
French form of Latin Maximus, MAXIME means "the greatest."Â
Boy/Male
Indian
Auspicious, Prosperous
Girl/Female
Arabic, Muslim
Increase; Excess; High Degree; Maximum; Feminine of Mazid
Girl/Female
Latin
The best.
Boy/Male
Muslim
Auspicious, Prosperous
Boy/Male
Arabic
Trusting
MAXIMUM OPERATING-DEPTH
MAXIMUM OPERATING-DEPTH
Boy/Male
Hindu
Boy/Male
Tamil
Embellishment, To be charming
Girl/Female
Muslim/Islamic
Heaven
Boy/Male
Arabic, Hindu, Indian, Muslim, Telugu
Dawn; Auspicious Dawn; Morning Glory; First Ray of Light
Male
English
Anglicized form of Hebrew Pachath-mowab, PAHATH-MOAB means "governor of Moab" and "pit of Moab." In the bible, this is the name of an ancestor of a family of Babylonian exiles, and the name of the father of Hashub.Â
Surname or Lastname
English
English : variant of Fenn.Reduced form of Irish McFann.The first recorded bearer of this name in North America is John Fann, who was born in Richmond Co., VA, in 1688.
Girl/Female
Australian, French, Greek
Pearl
Boy/Male
Gaelic, German
One who Sings Ballads
Girl/Female
Muslim/Islamic
Light
Boy/Male
Christian & English(British/American/Australian)
Residence Name
MAXIMUM OPERATING-DEPTH
MAXIMUM OPERATING-DEPTH
MAXIMUM OPERATING-DEPTH
MAXIMUM OPERATING-DEPTH
MAXIMUM OPERATING-DEPTH
n.
The greatest quantity or value attainable in a given case; or, the greatest value attained by a quantity which first increases and then begins to decrease; the highest point or degree; -- opposed to minimum.
n.
A self-registering thermometer, especially one that registers the maximum and minimum during long periods.
pl.
of Minimum
n.
The least quantity assignable, admissible, or possible, in a given case; hence, a thing of small consequence; -- opposed to maximum.
n.
A coarse umbelliferous plant of Europe (Tordylium maximum).
p. pr. & vb. n.
of Onerate
a.
Operating in any way.
n.
That which is operated or accomplished; an effect brought about in accordance with a definite plan; as, military or naval operations.
p. pr. & vb. n.
of Operate
a.
Greatest in quantity or highest in degree attainable or attained; as, a maximum consumption of fuel; maximum pressure; maximum heat.
a.
Having the power of acting; hence, exerting force, physical or moral; active in the production of effects; as, an operative motive.
n.
Minimum.
n.
In a curve referred to polar coordinates, any point for which the radius vector is a maximum or minimum.
n.
The act of cooperating, or of operating together to one end; joint operation; concurrent effort or labor.
a.
Operating together; as, cooperant forces.
n.
The act of operating or working; operation.
pl.
of Maximum
a.
Based upon, or consisting of, an operation or operations; as, operative surgery.
n.
The act or process of operating; agency; the exertion of power, physical, mechanical, or moral.
a.
Producing the appropriate or designed effect; efficacious; as, an operative dose, rule, or penalty.