SDI Scuba Certification Exam Study Guide Questions and Answers 2024
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Course
SDI Scuba Certification
Institution
SDI Scuba Certification
Define SCUBA - S - self
C - contained
U - underwater
B - breathing
A - apparatus
List 3 important scuba diving changes that occurred in 1950s - 1) published USN dive tables
2) invented the personal dive computer
3) equipment manufacturers made improvements to the design and workmanship of...
SDI Scuba Certification Exam Study
Guide Questions and Answers 2024
POSSIBLEA
SDI
8/13/24
, SDI Scuba Certification Exam Study Guide Questions and Answers 2024
Define SCUBA - S - self
C - contained
U - underwater
B - breathing
A - apparatus
List 3 important scuba diving changes that occurred in 1950s - 1) published
USN dive tables
2) invented the personal dive computer
3) equipment manufacturers made improvements to the design and
workmanship of gear
Name 3 different devices that modern dive computers replace - 1) dive
tables
2) J-valves
3) depth gauges
What sets SDI apart from other training agencies? - First dive training
agency to provide entry level scuba instruction that incorporates the use of
personal dive computers --> more streamlined scuba course w/ more
instruction time in the water
How much larger and closer do objects appear underwater and why? -
Objects underwater appear 25% larger and 25% closer
As light travels through the airspace created by the mask, it bends, creating a
magnifying effect.
How much faster does sound move through water than air and why? - 4
times faster because water is about 800 times denser than air.
What is the first color to be absorbed underwater? - Red (within first 25 feet)
When diving from shore, the best time to dive is when there is the least
amount of tidal current. _______ tide is when there is no horizontal water
movement. - Slack tide
If you are caught in a rip current, first swim _____ to the current to get out
of it before swimming towards shore. - Parallel
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