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Dive Computer-related
NDL
The No-Decompression Limit refers to the maximum amount of time a diver can spend at a specific depth without the need for mandatory decompression stops during the ascent. Read more
MOD
Maximum Operation Depth / 最大行動水深界
MOD
Maximum Oxygen Depth Limit / 最大酸素限界水深
CNS
Central nervous system / 中枢神経
FO2
Fraction oxygen/ 酸素割合比
FN2
Fraction Nitrogen / 窒素割合比
EAN
Enriched Air Nitrox / エンリッチドエアーナイトロックス Read moe
TTS
Time to surface/
ASC
Ascent time
Surface
surface interval / 水面休息時間
PPO2
Partial pressure of oxygen/ 酸素分圧
OC
Open circuit/ オープンサーキット
CC
closed circuit / クローズドサーキット
MAX
Maximum Depth/ 最大水深
AVR
average depth
GF
gradient factor / 保守性レベル
Ceil
ceiling / シーリング
EOD
end of dive
RMV
Respiratory Minute Volume / 分時空気消費量
SCR or SAC
Surface Consumption Rate / Read more
BCD-related
Bladder
Air accumulation area / BCDの空気が溜まる部分 Read more
Inflater
The part that controls intake and exhaust / 吸気や排気を操作する部分 Read more
Harness
The term “harness” in the context of a BCD refers to the system of straps and buckles that secure the BCD to a diver’s body Read more
Wing type BCD
A wing-shaped bladder positioned behind the diver’s back. Read more
Front adjustable type BCD
Jacket type BCD
Sidemount BCD
Designed for a configuration where the diver wears one or two tanks on their sides. Read more
Double tank BCD
Dump valve
To release air by pulling a cord or pressing a button. / 排気弁のこと Read more
D-ring
metal or plastic attachment point shaped like the letter “D.” Read more
Cylinder-related
Steel tank
The pressurized cylinder that holds the breathing gas (usually a mix of compressed air or enriched air nitrox) that divers use underwater Read more
Aluminum tank
It is a common alternative to steel tanks. Read more
Hydrostatic date
The date on which the tank underwent a hydrostatic test Read more
Stage bottle
The stage bottle is an additional breathing gas source that allows divers to execute more complex and extended dives beyond the capacity of their primary scuba tank. Read more
Pony bottle
It serves as a redundant air source. Read more
EAN
Enriched Air Nitrox (EANx) in scuba diving refers to a breathing gas mixture that contains a higher percentage of oxygen than regular air. Read more
DIN valve
The DIN valve has a threaded connection that screws directly into the tank’s valve opening. Read more
Yoke valve
Known as an “A-clamp” or “international valve,” is a type of valve used on scuba tanks to connect the regulator to the tank.
Read more
Yoke Adapter
Converts the DIN-style connection into a yoke-style connection
Read more
Analyzer
it is employed to determine the percentage of oxygen (O2) present in the gas mixture. Read more
DIN adapter
DIN adapter enables the use of a yoke regulator with a DIN valve tank, allowing divers to adapt their equipment to different types of tank valves commonly encountered in the diving community. Read more
Disease-related
Oxygen toxicity
Two types of oxygen toxicity are relevant to diving: central nervous system (CNS) oxygen toxicity and pulmonary oxygen toxicity.
Read more
