Glossary of underwater diving terminology

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This is a list of technical terms, jargon, divers hoses and acronyms used in underwater diving. The definition listed is in the context of underwater diving. There may be other meanings in other contexts.

Video Glossary of underwater diving terminology

A

AA6061

Aluminum alloy 6061 (no sustained load crack). Currently (2012) is used for the manufacture of new dive cylinders.

AA6351

Aluminum alloy 6351. These alloys are subject to sustained load cracks and require periodical periodic eddy current testing . It is no longer used for the manufacture of new cylinders, but many of these alloy cylinders are still in service.

ABLJ

see adjustable float jackets

absolute pressure

Tekanan statis total pada titik referensi: Tekanan relatif terhadap vakum.

A-clamp fitting/valve

lihat pas/katup yoke.

A-clamp adapter

lihat adaptor yoke

penambahan aktif

lihat juga Rebreather # Rangkaian semi-tertutup tambahan aktif

The system for recharging rebreather gas is semi-closed circuit where gas is added to the respiratory circuit by a mechanism, regardless of the current volume, and excess gas is released to keep the loop volume within the boundary. Compare with passive addition

active carbon

active charcoal

Filter media used to remove oil, water and odor from breathing air.

ADAS

Scheme for certification of international commercial and job divers.

customizable buoyancy life jacket

Also known as ABLJ or buffon horse buoyon

Combination compensator buoys and winding blower jackets worn on the chest and around the neck.

ADV

Automatic Diluent Valves: The demand valve is set into the rebreather breathing loop to inject the diluent gas into the loop when the loop volume falls and there is not enough gas for inhalation.

A-frame

Part of Launch and Recovery System

Gantry or davit to launch and restore bells, anchor stages or a big ROV. Usually deployed by a hydraulic sheep tail that swings the skeleton above the deck or the sea as needed. The load is turned on and lowered by cable from the top of the frame.

AGE

see arterial gas embolism

aggressive_ (decompression)

The decompression profile tends to be a shorter overall decompression time for certain pre-climbing dive profiles, accepting an increased risk of decompression disease to reduce overall ascent time.

air dome

Part of cave that trap air or other gas at the top. This gas is not directly connected to the surface.

airlift

A tool based on a pipe, used by divers to suck small objects, sand and mud from the ocean floor and to transport the resulting debris up and away from the source. Air is injected into the lower end of the pipe and rising air bubbles and causing upward flow of material pulling from below.

top air

1. Complete the planned breathing gas mixture by filling the compressed air.

2. Produces a mixture of respiratory gas partially used with compressed air, giving different mixtures which are analyzed after filling.

algal bloom

Increased or rapid accumulation in algae populations (usually microscopic) in aquatic systems. Some blooms can be identified by the color change of water resulting from the high density of pigmented cells. Visibility can be severely disrupted for several hours for days.

ALP

Articulated Loading Platform, a single mooring type consisting of a floating upper structure with a lattice leg connected by an articulated connection to the mooring.

alternative air source

Secondary air supply or other respiratory gas used by divers in an emergency

vertigo alternobaric

The rotation is caused by the pressure difference between the middle ear.

dive height

Dive at a location where the water level is at an altitude requiring modification of the decompression schedule. (more than about 300 m (980 ft) above sea level.

Tekanan sekitarnya.

anoxia

Absolutely lack of oxygen.

AODC

Association of Offshore Contractors, one of IMCA's predecessors.

aphasia

Language impairments that range from difficulty remembering words to being completely incapable of speaking, reading, or writing

apnea

1. Respiratory Suspension, breath-resistant.

2.Ã, Freediving.

Aqua-lung

Self contained open circuit of underwater breathing apparatus consisting of diving cylinder and diving regulator.

arterial bubble model

Decompression model in which the lung filtration capacity is assumed to have a radius threshold size of red blood cells and a small enough decompression bubble can pass to the side of the artery, especially during the initial phase of the ascent.

Blockage of arteries by gas bubbles. Possible consequences of pulmonary overpressure trauma.

the articulated loading platform

see ALP

vest AR

Strap vest (vest) clothing from a thick cloth with tightly woven webbing straps so the diver can not slide out under predictable situations.

climb

Part of the dive profile in which the diver moves upward toward the surface. Climbing can be disrupted by stop (qv), when the diver maintains a functional constant depth for decompression purposes, and draws (qv), during which period there is consistent upward motion (small variations in the scale of a few seconds are generally ignored).

climbing level

The rate at which the depth decreases at the end of the dive. An important component of decompression.

U.S.S.E.T.

SCUBA Association of Service Engineers and Technicians.

ATA

Also ata or absolute atmosphere

The absolute pressure unit is equivalent to standard atmospheric pressure.

atmospheric diving settings

Also ADS

A small submersible articulated small small anthropomorphic form resembling a suit of armor, with a complex pressure joint to enable articulation while maintaining the internal pressure of an atmosphere.

swimmers attack

see swimmer

officer

see diver diver

Autonomous Danners

EN 14153-2/ISO 24801-2 standard competence for recreational scuba divers. Level 2 The "autonomous diver" has sufficient knowledge, skills and experience to make diving, in open water, which requires no decompression in the water to stop, to a suggested maximum depth of 20 m with other scuba divers at the same level, only when appropriate support is available on the surface, and in conditions equal to or better than conditions in which they are trained without the supervision of a scuba instructor unless they have additional training or are accompanied by dive leaders.

Maps Glossary of underwater diving terminology

B

gas back

Respiratory gas carried by scuba divers in cylinders mounted on the back. Generally the primary respiratory gas for the bottom or longest of a dive.

kick back

kickback

Finning technique to move backward. Not an easy kick, strong or elegant, but useful in many situations. The fins tilt in opposite direction with the legs straight, then sweep up and toward the diver by bending the knee in the power stroke. The knee may move down slightly at the same time by bending over the hips for stability. Stroke back the fins by directing them backwards in line with the body axis, to reduce the forward thrust until the legs straight again

backmount

back-mount

The practice of carrying scuba mounted behind divers, supported by armor, backplate or BCD stabilizer jacket. Compare with sidemount

backplate

A plate, usually made of metal, rests on the backs of divers, and where the main scuba cylinder is installed. Grasped into the body with a strap on the shoulder and around the waist. Sometimes also the groin strap and chest strap. Usually used with rear inflation buoyant compensator.

ransack

Similar rigid or semi-rigid structures in the function to backplate , usually made of printed plastic, but sometimes of metal, are used both as stiffener and reinforcement for jackets Floating force compensation, or as the basis of an independent scuba harness of the floating compensator. The backpack supports and stabilizes the scuba cylinder on the back of the diver.

backup light

Light diving is taken as a backup to use in case of a failure of the main light.

backup regulator

also secondary, second safe or octopus

The second regulator is connected to a set of twin cylinders or manifolds.

reverse reel entry

rollback

also rear scroll entry

The method of water entry in which the diver sits rolling backwards from the side of the boat, allowing the scuba cylinder to attack the water first.

bailout block

see also gas block , or gas diversion block

A gas switching block specifically intended for bailout connections to the main gas supply (which may be scuba or surface supply) that allows the diver to switch from the main gas supply to the emergency gas supply while continuing to use the same funnel, second stage regulator, full face mask or helmet. Bailout blocks are commonly used in open circuit breathing apparatus, equivalent functions on rebreather provided by bailout valve (BOV). The bailout block can be mounted on the side of a diving helmet or full-face mask, or it can be mounted in a convenient place in the harness of the diver, and includes a bailout valve, used to select the gas source, and one or more re-valves to ensure that emergency gas supply is routed just for divers.

bailout cylinder <

Scuba cylinder carried by underwater divers to be used as an emergency gas supply in case of failure of primary gas supply.

1. An open-circuit demand valve is built into a rebreather funnel, or other part of the respiratory loop, which can be isolated while the diver uses a rebreather to recycle the respiratory gas, and is opened at the same time by isolating the respiratory loop when divers dive into open circuit.

2. A valve that opens the gas supply from a surface-supplied dive bailout tube, used in case of surface gas failure, is usually mounted on the side of a diving helmet or full-face mask, or in a harness block divers.

set bailout

bailout system

Independent gas supply of breath carried by divers for use in case of major gas supply failures. It usually consists of a bailout cylinder with a first-stage regulator, and either a second-stage regulator or connected to a bailout block or a bailout valve (q.v.) The submersible pressure gauge is also usually provided.

balanced control

Regulators designed to provide consistent demand effort are not affected by pressure or cylinder gas depth.

mask band

Heavy duty full-face mask with many characteristics of light-weight helmet. In the structure it is the front of the lightweight helmet from the top of the face plate down the request valve and the exhaust port, including bailout blocks and communication connections on the sides. This rigid frame is attached to the neoprene hood by a metal clamp band, hence its name.

band

see cylinder band

bar

see also bar (unit)

The pressure metric unit commonly used in diving, equals 100 kiloPascal, and is similar to standard atmospheric pressure.

Toothache is caused by pressure difference.

barotrauma

Injuries caused by pressure differences.

baseline

1.Ã, (also tank factor ) The numerical value is calculated for a set of cylinders or manifolds related to volume and pressure in the imperial unit system. Calculated by dividing the nominal capacity (cubic feet) with the cylinder working pressure (psi) to express the volume of cubic feet per psi of filling pressure (sometimes multiplied by 100 to give cubic feet per 100 psi). Used to convert cylinder pressure into free gas volume.

2. A line that is the basis for measurement or for construction; see datum (calculation or comparison)

3. A set of data that is a reference point (technique or science) for later data.

cart

see diving stage

BAT wing

Floating And Cutting Wings. Resident float compensator cells are used with sidemount harness. The volume of buoyancy is mostly above the lower back.

BC

BCD

see buoyancy compensator

BCD blowup

Ascending uncontrollable rises caused by the inability to release gas from the buoyant compensator faster than expanding due to decreased pressure from climbing.

beach master

see also dive marshal

Someone on the beach who notes when the divers goes in and out of the water. Usually used during recreational scuba training to track students, watch equipment, and provide assistance when needed.

bell

1.Ã, diving jump (q.v.)

2. Snooze on the line of life, used in pairs, for the purpose of signaling.

bell bounce dive

Operation oriented dive surfaces where divers are transported in and deployed from closed bell, and either decompressed on the bell on the surface or transferred under pressure to the decompression deck of space for decompression.

cursor bell

Mechanism or structure to guide and restrict bell movement when near the dispersion platform to improve handling in bad weather.

bell diving

1. Every diving operation where divers travel or work from diving bells

2. Dive operations where divers are transported and deployed from closed bells, either as surface-oriented (bell-chimes) or dive-saturation.

A safety rope made of strong webbing, which is fastened around the diver over the exposure suit, and allows the diver to be removed without risk of falling from the armor.

bellman

The idle diver is deployed on the diving bell

bell run

Part of the bell diving operation from the lock-off bell to the lock-on bell (to and from the life support system)

bell stage

A framework that runs beneath closed bells that keep the bottom of the vessel from the bottom enough to permit the diver to use the bottom hatch when the bell rests at the bottom or in the weight clump.

bell umbilical

Combined between supply and hoses and cables to support life, power and communication between the bells of bells and support platforms

slide belt

also belt slider, triglide, heavy weight, heavy slider

A hardware item with two parallel slots fitted to utilize or strap nets to prevent other components such as D-rings and weights from sliding along the webbing.

bent D-ring

D-rings that have been bent about 45 Â ° near the straight sections on both sides, forcing it to project slightly from the harness when pushed to one side, allowing easier clip installation. â € <â € <

bend

Decompression: Injury caused by bubbles formation in the tissues after hyperbaric exposure.

BIBS

Built with respiratory system. An air supply supply system with an external exhaust used to provide space occupants with respiratory gas other than the gas used to compress the room. Used for emergency breathing gas treatment and gas if the room is contaminated.

Billy ring

The Three D Ring is welded together along its straight side so that one is perpendicular to the other two. It uses two flat rings to keep the third in an upright position when mounted in woven harness, allowing it to be more accessible for clips on the stage cylinder. Named after Captain Billy Deans.

BK hook

also B.K. hook or BK hooks

A type of lifting hook held securely closed when under load by a lever system where the heavy load holds the quit on the safety hook.

blending stick

Mixing the tubes in which the gas continues to be mixed before it is inserted by the compressor, usually at atmospheric pressure. Usually refers to the manufacture of nitrox from the air with additional oxygen, but also used for trimix. The gas mixture is usually continuously analyzed at the exit of the mixing rod to monitor the composition.

blind traverse

Passing a cave from one entrance to a different exit that has never been used by a diver before.

block adapter

Installation of screw adapter mounted to the DIN 200/240 column pillar valve to allow connection of the yoke regulator or fill the whip.

blowdown

Procedures suppress diving spaces or saturation habitats.

bursts

Uncontrolled release of crude oil and/or natural gas from wells after the pressure control system has failed.

blowout prevention

also BOP

Large special valves are used to seal, control and monitor oil and gas wells. Generally operated remotely by hydraulic ram.

blue hole

Washbasin holes in the lake or the sea are often the entrance to the cave. Blue holes in the sea are subject to tides so their currents are regularly reversed.

snap bolt

also piston bolt

A metal connector comprising a hook with a spring axial sliding rod that must be pulled manually to allow the latch to be attached to something or removed. Can be single or double ended, and if one-end is usually equipped with a revolving ring opposite the jaw.

bomb

Commercial rescue levers for high pressure gas storage cylinders with a capacity of about 50 liters of water, also known as J .

slave wing

see bungee wing

The term is insulting to bungee wings based on fetishist terminology.

bonnet

The top of the copper helmet wrapping the diver's head and sealed to the bottom or corselet (q.v.)

amplifier

also booster pump

see also compressor

The engine is used to increase the gas pressure. Usually refers to cases where the incoming pressure is above ambient pressure.

BOP stack

Blowout boost: A collection of some blowout prevents that you can use to turn off the well.

bottom gas

Gas is inhaled by divers in the deepest diving. Compare with gas travel and gas decompression.

bottom time

The time used to calculate the decompression obligations of the decompression table. For most tables, this is defined as the elapsed time from start down to start the last ascent to the surface, excluding ascent and decompression time.

bottom timer

Device used to measure and record total time spent under water during diving. They generally not only record the basic time {q.v.}.

bounce dive

1. also surface-oriented dives : In commercial dives, bounce diving is an alternative to dive saturation. Each dive in which the diver is decompressed directly after the dives.

2. In recreational dives, the reflection dives are decreased to the maximum depth and then the ascent straight back to the surface with minimal down time, in the dive profile resembling spikes.

BOV

view bailout valve

bowline

The node is used to form a secure loop and does not slip at the end of the line.

Boyle's Law

The relationship between pressure and volume at constant temperature in an ideal gas.

splitting space

An area in the cave where a large amount of material falls from the top.

breakout

The point at which a partially revoked object underneath the sediment overcomes the sediment adhesion and the force required to lift it down to the weight of the visible object.

respiratory gas

also inhale the mixture

The gas is supplied to the diver to breathe, either directly to the diver or to the hyperbaric environment of diving bells, diving spaces or saturated habitats.

breathing circle

Gas flow path in rebreather consisting of lung diver, funnel, valve, hose, counterlungs and scrubber through rejuvenated gas.

Broco cutter

The type of thermal spear is initiated by an electric arc, which is commonly used for underwater cutting work.

BRUV

Baited remote underwater video. A system for assessing fish populations using video cameras to record fish attracted to the feed tube.

BTV

BÃÆ'Â © ance tubaire volontaire : Eustachian tube opening voluntarily to equalize the middle ear.

bubble model

The decompression model is based on the assumption that bubbles will form during non-symptom decompression.

see glossopharmaceutical insufficiency

friend bottle

Bailout cylinder brought by scuba divers, especially during solo dives.

buddy breathing

Sharing the respiratory gas from one valve of demand by two or more divers, generally after an emergency outside the gas.

check my friend

A procedure performed by a scuba diver uses a buddy system where each diver checks that other dive equipment is configured, installed, and functioning correctly before entering the water for dive.

dive partner

A safety procedure in which two or three divers interact with each other during diving and provide assistance or rescue when necessary.

row bud

Short lines between two divers, used to maintain contacts during diving, generally in poor visibility, or other conditions where divers may be separated and unable to quickly find each other.

system buddy

A procedure in which two divers look out for one another's safety, and provide assistance if others get into trouble.

BÃÆ'¼hlmann table

BÃÆ'¼hlmann Algorithm

Dive tables and decompression algorithms in which the tables are based, and some dive computers are programmed, based on the decompressed gas decompression model that is derived and tested by Dr. A.A. BÃÆ'¼hlmann.

bungee (sidemount)

see also bungee ring

The length of the shock cable is used to hold the upper end of the cylinder and keep them tucked on the diver's shoulders while swimming. It is usually cut to the shoulder of the D-ring (s) of the harness and circular around the cylinder valve. Can attach to the back of the armor between the shoulder blades, or run continuously from one D-ring shoulder, around the back under the arm to the other D-ring shoulder.

bungee wing

Return compensator inflation buoyancy with a string rope or loop that exerts force on the bladder to oppose expansion during inflation.

buoyancy

1.Ã, ( Main article: Floating ). The upward force of the object is immersed in the liquid because the pressure applied over the surface is submerged.

2. resultant strength up the buoyancy and weight of objects immersed in the liquid.

buoyancy check

Procedures for testing and adjusting the weights carried by underwater divers. Divers use all the personal equipment to be used for planned dives, with an almost empty dive (s), and empty float compensators, in shallow waters with the same density as expected on diving, and add or remove loads until neutral floats. After a buoyancy inspection, it usually distributes loads for safety, trimming, and comfort.

buoy compensator

also BC, BCD, life buoy compensator, ABLJ, horse collar, stabilizer jacket, pocket jacket or wing

An airtight bladder worn by a diver that can be filled with air and released to adjust and control the buoyancy of the diver.

buoyancy control

Skills to maintain proper buoyancy any time during the dive.

burn tester

Device to measure the actual capacity of the battery relative to its nominal capacity, and related functional time for devices whose battery power is on.

burn time

Effective use time of battery powered device. Mainly used for reference lights and scooters.

disk burst

A non-reclosing pressure relief used to protect the dive cylinder from excess pressure.

butterfly clip

A type of snap bolt with the opening of a tapered guide gate formed by a bulge on both pistons and fixed sides of the gate.

D-ring butterflies

A plate with two D-shaped pieces on the opposite side of two to four parallel longitudinal slots for webbing. Used in the upper back of the groin ropes instead of butt-plate (q.v.) on a minimalist side edge edge.

butt-plate

Rigid or stiff flexible extensions to a backplate or other scuba harness that supports butt-plate plates, are used to cut the lower end of the sidemount cylinder to the harness.

src: freestyledivers.me

C

Dive in enclosures designed to protect divers from large aggressive marine animals, usually sharks

CALM

Catenary anchor leg mooring. Named for the catenary curve of the anchor cable that holds the buoy in position. Also referred to as single buoy mooring, monobuoy or loading buoy.

cam band

Rope, usually webbing, with cam action tensioner screw which is commonly used to secure the diving cylinder to the backplate, BCD stabilizer jacket or any other form of harness diving.

camel

Closed lifter bags, usually cylindrical.

light tube

Dive light consisting of a light head connected to a battery tube with a cable.

canoe boat

Scuba diving from the canoe, used when the dive location is outside the distance of a comfortable swimming.

carbon dioxide poisoning

Toxic effects of carbon dioxide, due to the elimination of untenable carbon dioxide from passing breathing, excessive breathing work, milling failure in the rebreather system, or inadequate ventilation in the dive room or free flow helmet. Sometimes caused by the supply of contaminated gas.

carbon monoxide poisoning

Toxic effects of carbon monoxide, usually due to supply of respiratory contaminated gas.

lung resuscitation

Emergency procedures are performed in an attempt to manually maintain intact brain function until further action is taken to restore spontaneous blood circulation and breathe on a person in a heart attack.

CAS

see also critical pressure

Critical Air Supply (Critical Air Supply), the amount of air required to safely exit from dive penetration. When the air supply reaches this level, the dives have reached the planned turning point.

cascade filling

Decanting from multiple storage cylinders in a row, generally using procedures to maximize cost pressures. Often used in a mixture of partial pressure gases.

Mixture of water and carbon dioxide absorber caused by flooding scrubber, and which can reach the mouth of the diver through the respiratory loop. Alkalinity depends on the absorber used.

cave

The naturally occurring cavities in the bedrock, or underwater tunnels not lit by natural light, are large enough for human entry. Statute 810.13 of the Florida legislature defines the cave as: any vacancies, cavities, recesses, or systems of interconnection parts that naturally occur beneath the surface of the earth or in cliffs or balustrades, including natural underground water and drainage systems but not including mines, tunnels, waterways, or other man-made excavations, and large enough to allow a person to enter. The word "cave" includes a cave, natural hole, or exhaust pit which is an extension of the entrance to the cave.

cave arrow

A unidirectional line marker that points to the exit.

cave content

Fills the scuba cylinder to a pressure significantly above the measured safe working pressure (charging pressure). Illegal in some jurisdictions, and increase the risk of catastrophic failure.

cave row

1.Ã, see line spacing

2. Small diameter braided synthetic braided rope used for this purpose.

reel cave

A special reel made for diving caves, used to lay and restore a large cave line used as a guide line to find permanent exit or guide lines.

cave

1. Two or more interconnected dungeons or alleys in bedrock, each big enough to fit in by humans.

2. The starting chamber of the underwater cave system is illuminated by natural light.

3. A cavity occurring naturally in bedrock or underwater channels, large enough for humans to enter, illuminated by natural light, or where it is possible from all points to see out with natural light.

cavern dive

Visibility more than 40 feet, Maximum penetration 130 feet, Maximum depth of 70 feet, and always in the sunlight area. Do not cross the line.

C-card or certification card

Plastic cards issued for divers by the certification body as proof of complete dive training and experience required for certification level.

CCR

Closed Circuit Rebreather: see also ECCR, MCCR.

CCUBA

Closed Underwater Circuit Equipment. Military alternative term for CCR

ceiling

Overhead or solid decompression restrictions for straightforward vertical ascent to the surface

cenote

A dump in Mexico. Generally with vertical protruding walls or shafts with water opening into the cave system.

CF

clusterfuck

charlie foxtrot

Events when situations are very different and usually out of control of the plan, sometimes involving immediate hazards to life and limbs, and often involve poor judgment.

CGA

The Compressed Gas Association is the American trade association for the industrial and medical gas supply industry. CGA publishes standards and practices that codify industry practice. In cases where government regulation is not specific, CGA documents are considered authoritative. The CGA V-1 Standard for Compressed Gas Cylinder and Inlet Cylinder Valves includes a diving cylinder valve channel. Security devices such as overpressure protection of burst disks are specified by the CGA Standard S1.1.

CGA 850

Compressed Gas Association valve standard CGA 850 is the standard for scuba cylinder valve outlets for yoke connectors

chain pursuer

Ring-shaped components or hooks used to install and restore conventional mooring systems. The hunter hooked the chain and pulled toward the ancor until it slid into the shank anchor and was stopped by the crown. The hunter is then used to break the anchor by pulling it up directly.

diving room

Diving simulations in pressurized hyperbaric chambers for pressure equivalent to the nominal depth of diving.

space operator

Competent person to operate dive room

charging pressure

The pressure is stamped on the container for permanent gas to indicate the maximum gauge pressure (measured or corrected to 15 ° C) applicable at the time of filling.

Charles Law

The volume relation with the temperature at constant pressure of the ideal gas.

chicken vest

A sleeveless wetsuit neoprene vest with hood attached.

chimney

Cave parts that are vertical or near vertical and like axis.

Chinese Lantern

The connection between end manifold pipeline (PLEM) and single point mooring buoy (SPM) uses two to four separate flexible underwater hose strings.

choker (sidemount)

The rope around the sidemount cylinder neck is used to hold the bolt snap closer to the neck so that the cylinder head stays closer to the diagonal of the diver. Choker can be a small woven rope with a sliding buckle for adjustment, so it can be tightened to bring the clip to the neck or slack while in use.

chokes

The symptoms of decompression disease are manifested by shortness of breath, caused by a large number of venous gas bubbles in the lung capillaries that interfere with gas exchange.

Christmas tree

also tree

The assembly of valves, spools, and fittings is mounted over the wellhead and is used primarily to control flow, usually oil or gas, out of the well.

Christmas tree ladder

Dormitory stairs that have a single central rail with rigid cantilever rungs to each side, allow for use when wearing swimfins.

Christo-lube

Usually Christo-lube MCG111, an oxygen-compatible lubricant suitable for use in breathing apparatus in oxygen service.

series

Diving route Cave where there is a one-way segment. The circuit can be simple or complex depending on the number of jumps involved.

civils

see beach dives

closed bell

also a dry bell

Closed or dried bells are pressure vessels for human occupation that are lowered into the sea to the workplace, equated with pressure on the environment, and opened to allow divers in and out. Divers can be decompressed in the bell or moved under pressure to the hyperbaric space on the surface.

heavy clump

The weights used to keep the cable bell wiring remain aligned.

code of practice

A set of professional standards or written guidelines and rules of procedure to be followed by members of the profession, trade, occupation or organization. The code of practice may be compiled and approved by a particular member of the profession or written guidance issued by an authorized body or professional association to its members to help them comply with their ethical standards. A code of practice usually does not have the force of law, but is often required or mandatory practice for members of an organization.

coded code

Welders are trained and qualified and competent assessed for welding of certain types under certain conditions.

swimmers

Source of the article : Wikipedia