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A buoyancy compensator (BC), also called a buoyancy control device (BCD), stabilizer, stabilisor, stab jacket, wing or adjustable buoyancy life jacket (ABLJ), depending on design, is a type of diving equipment which is worn by divers to establish neutral buoyancy underwater and positive buoyancy at the surface, when needed.
If a weight harness is worn, or the BCD uses an integrated-weights system, the system is checked for correct assembly and function of clip release. A secondary check is to ensure that the buddy is familiar with the weight system of the diver being checked, and is able to operate it to ditch weights in an emergency. R - Releases
A backplate and wing (often abbreviated as BP&W or BP/W) is a type of scuba harness with an attached buoyancy compensation device (BCD) which can be used to establish neutral buoyancy underwater and positive buoyancy at the surface. Unlike most other BCDs, the backplate and wing is a modular system, in that it consists of separable components.
A Lepidoptera specimen drawer in a museum collection in Poland Another Lepidoptera specimen drawer in a museum collection in Poland. Lepidopterology (from Ancient Greek λεπίδος (lepídos) 'scale' πτερόν (pterón) 'wing' and -λογία [1]) is a branch of entomology concerning the scientific study of moths and the two superfamilies of butterflies.
In butterflies, the exposed pupa is often referred to as a chrysalis, derived from the Greek term "chrysalis": χρυσός (chrysós) for gold, referring to the golden colour of some pupae. [68] The caterpillars of many butterflies attach themselves by a button of silk to the underside of a branch, stone, or other projecting surface.
This is a glossary of technical terms, jargon, diver slang and acronyms used in underwater diving.The definitions listed are in the context of underwater diving.
A variable-buoyancy pressure vessel system is a type of rigid buoyancy control device for diving systems that retains a constant volume and varies its density by changing the weight (mass) of the contents, either by moving the ambient fluid into and out of a rigid pressure vessel, or by moving a stored liquid between internal and external variable-volume containers.
Used to convert cylinder pressure to free gas volume. [9] 2. A line that is a base for measurement or for construction; see datum (calculations or comparisons) 3. A data set which is a point of reference (engineering or science) for later data. basket. See: diving stage. BAT wing Buoyancy and trim wing.