PADI IDC Complete Study Guide Test.
Recreational diving - CORRECT ANSWER Diving no deeper than 130 feet (40 metres) with the no stop
limits of recognized dive tables or dive computers. Must be within 40 metres/130 feet of the surface or
within sight of light from the surface if diving in overhead environment.
No Stop Limit - CORRECT ANSWER the max time you can stay at a given depth and still ascend directly to
the surface without making a decompression stop (aka no decompression limits or NDL)
Decompression sickness - CORRECT ANSWER "the bends" - a condition caused when gas bubbles form in
the body after a dive
Decompression stop - CORRECT ANSWER a pause or pauses in ascent at a specific depth and time to
allow the body to release dissolved gas and avoid decompression sickness
Safety stop - CORRECT ANSWER a pause in ascent, usually at 15 feet (5 metres) that is not required but
made for added conservatism to further reduced chances of decompression sickness
PADI - CORRECT ANSWER Professional Association of Diving Instructors; established in 1966
Deep Dive - CORRECT ANSWER 100 feet (30 metres) or deeper
PADI Master Scuba Diver - CORRECT ANSWER PADI Rescue Diver who has earned 5 specialties.
PADI Junior Certifications - CORRECT ANSWER 10 years old or older can earn PADI junior OWD
certification and those 12 years and older can be come junior AOW and junior RD. Same requirements as
adult certs but require diving with an adult and some additional limits until the diver reaches the age of
15.
PADI Seal Team and Bubblemaker - CORRECT ANSWER 8 years and older can scuba dive in a pool or
shallow confined water area with pool-like conditions. Bubblemaker status allows kids to experience
scuba diving but Seal Team offers a series of pool activities that build skills that transfer to PADI junior
OWD.
, Subdivisions of Tec Diving - CORRECT ANSWER Deep diving; trimix diving; cave diving; technical wreck
diving; technology-specific diving
Tec Diving definition - CORRECT ANSWER 1) diving more than 130 feet (40 metres); 2) required stage
decompression; 3) diving in overhead environment beyond 130 feet; 4) accelerated decompression; 5)
use of different gas mixtures on single dive
Hang time - CORRECT ANSWER slang for time required for decomp stops
Accelerated decompression - CORRECT ANSWER Switching to gas blends high in oxygen, or pure oxygen,
to shorten the required decompression time
Trimix - CORRECT ANSWER gas blend consisting of helium, oxygen, and nitrogen; the helium offsets
narcotic properties of nitrogen at deep depths
Enriched air nitrox - CORRECT ANSWER gas blend consisting of nitrogen and oxygen, with the proportion
of oxygen higher than 21 percent; used to accelerate decompression in tec diving
oxygen toxicity - CORRECT ANSWER convulsions caused by oxygen at depth; safe limits determined by
the proportion of oxygen in the gas and the depth
CCR - CORRECT ANSWER closed-circuit rebreather, a form of scuba that is more efficient because it
recycles exhaled gases instead of releasing them as bubbles
hit - CORRECT ANSWER to suffer oxygen toxicity or decompression sickness
Technical deep diving - CORRECT ANSWER Dives deeper than 130 feet typically requiring decompression
stops; training focuses on equipment, calculations, and using different gas blends. Qualifies divers to
dive as deep as 165 feet.
Recreational diving - CORRECT ANSWER Diving no deeper than 130 feet (40 metres) with the no stop
limits of recognized dive tables or dive computers. Must be within 40 metres/130 feet of the surface or
within sight of light from the surface if diving in overhead environment.
No Stop Limit - CORRECT ANSWER the max time you can stay at a given depth and still ascend directly to
the surface without making a decompression stop (aka no decompression limits or NDL)
Decompression sickness - CORRECT ANSWER "the bends" - a condition caused when gas bubbles form in
the body after a dive
Decompression stop - CORRECT ANSWER a pause or pauses in ascent at a specific depth and time to
allow the body to release dissolved gas and avoid decompression sickness
Safety stop - CORRECT ANSWER a pause in ascent, usually at 15 feet (5 metres) that is not required but
made for added conservatism to further reduced chances of decompression sickness
PADI - CORRECT ANSWER Professional Association of Diving Instructors; established in 1966
Deep Dive - CORRECT ANSWER 100 feet (30 metres) or deeper
PADI Master Scuba Diver - CORRECT ANSWER PADI Rescue Diver who has earned 5 specialties.
PADI Junior Certifications - CORRECT ANSWER 10 years old or older can earn PADI junior OWD
certification and those 12 years and older can be come junior AOW and junior RD. Same requirements as
adult certs but require diving with an adult and some additional limits until the diver reaches the age of
15.
PADI Seal Team and Bubblemaker - CORRECT ANSWER 8 years and older can scuba dive in a pool or
shallow confined water area with pool-like conditions. Bubblemaker status allows kids to experience
scuba diving but Seal Team offers a series of pool activities that build skills that transfer to PADI junior
OWD.
, Subdivisions of Tec Diving - CORRECT ANSWER Deep diving; trimix diving; cave diving; technical wreck
diving; technology-specific diving
Tec Diving definition - CORRECT ANSWER 1) diving more than 130 feet (40 metres); 2) required stage
decompression; 3) diving in overhead environment beyond 130 feet; 4) accelerated decompression; 5)
use of different gas mixtures on single dive
Hang time - CORRECT ANSWER slang for time required for decomp stops
Accelerated decompression - CORRECT ANSWER Switching to gas blends high in oxygen, or pure oxygen,
to shorten the required decompression time
Trimix - CORRECT ANSWER gas blend consisting of helium, oxygen, and nitrogen; the helium offsets
narcotic properties of nitrogen at deep depths
Enriched air nitrox - CORRECT ANSWER gas blend consisting of nitrogen and oxygen, with the proportion
of oxygen higher than 21 percent; used to accelerate decompression in tec diving
oxygen toxicity - CORRECT ANSWER convulsions caused by oxygen at depth; safe limits determined by
the proportion of oxygen in the gas and the depth
CCR - CORRECT ANSWER closed-circuit rebreather, a form of scuba that is more efficient because it
recycles exhaled gases instead of releasing them as bubbles
hit - CORRECT ANSWER to suffer oxygen toxicity or decompression sickness
Technical deep diving - CORRECT ANSWER Dives deeper than 130 feet typically requiring decompression
stops; training focuses on equipment, calculations, and using different gas blends. Qualifies divers to
dive as deep as 165 feet.
