Other features may also be available using the data. See: Dive computer#Additional functionality and featuresįeature of some dive computers to measure cylinder pressure using an integral pressure gauge connected by HP hose to the regulator first stage, or receive data from one or more remote pressure transducers fitted to the HP port of a regulator, and display the pressure on the screen. The upper part of an open diving bell which can be filled with air for divers to breathe. This gas is not directly connected to the atmosphere. A section of cave which traps air or other gas at the top. See: Decompression practice#Conservatism Decompression schedule tending to shorter overall decompression time for a given pre-ascent dive profile, accepting increased risk of decompression sickness to reduce the overall ascent time. See: arterial gas embolism aggressive decompression The load is hoisted and lowered by cables from the top of the frame. Usually deployed by hydraulic rams which swing the frame over the deck or overboard as required. A gantry or davit for launching and recovering bells, stages, anchors, or large ROVs. See: automatic dump valve A-frame Part of a launch and recovery system. See: Buoyancy compensator (diving)#Adjustable buoyancy life jacketĪn early style of combination buoyancy compensator and inflatable life jacket worn on the chest and round the neck. See: Association of Diving Contractors International adjustable buoyancy life jacketĪlso: "ABLJ", "Fenzy", or "horse collar buoyancy compensator" See: Australian Diver Accreditation Scheme ADCI Compare with passive addition activated carbon activated charcoalĪ filter medium used to remove oil, water, and odours from breathing air.
System for semi-closed circuit rebreather feed gas addition in which gas is added to the breathing circuit by a mechanism, regardless of current volume, and excess gas is vented to keep the loop volume within limits. See: Rebreather#Active addition semi-closed circuit See: yoke fitting, and CGA 850 active addition See: yoke adaptor A-clamp fitting A-clamp valve Total static pressure at the reference point: Pressure relative to vacuum. See: Pressure measurement#Absolute, gauge and differential pressures - zero reference See: adjustable buoyancy life jacket absolute pressure Not used for new cylinder manufacture since 1988, but many cylinders of this alloy are still in service.
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AA6351Īluminium alloy 6351 is subject to sustained load cracking and requires periodical eddy current testing to identify crack development at an early stage. A few are loan-words from other languages.Īluminium alloy used for manufacture of new diving cylinders exclusively since mid 1988 as it is not susceptible to sustained load cracking. There are instances where a term may have more than one meaning depending on context, and others where several terms refer to the same concept, or there are variations in spelling. Others are more specialised, variable by location, mode, or professional environment. Many of the terms are in general use by English speaking divers from many parts of the world, both amateur and professional, and using any of the modes of diving. Underwater diving is practiced as part of an occupation, or for recreation, where the practitioner submerges below the surface of the water or other liquid for a period which may range between seconds to the order of a day at a time, either exposed to the ambient pressure or isolated by a pressure resistant suit, to interact with the underwater environment for pleasure, competitive sport, or as a means to reach a work site for profit or in the pursuit of knowledge, and may use no equipment at all, or a wide range of equipment which may include breathing apparatus, environmental protective clothing, aids to vision, communication, propulsion, maneuverability, buoyancy and safety equipment, and tools for the task at hand. Underwater diving can be described as a human activity – intentional, purposive, conscious and subjectively meaningful sequence of actions. There may be other meanings in other contexts. The definitions listed are in the context of underwater diving. This is a glossary of technical terms, jargon, diver slang and acronyms used in underwater diving. Definitions of technical terms, jargon, diver slang and acronyms used in underwater diving
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