What does SCUBA stand for? - ACCURATE ANSWERS Self
Contained
Underwater
Breathing
Apparatus
List the three important scuba diving changes that occurred in the 1950s - ACCURATE ANSWERS 1) Dive tables published for repetitive dives
2) Improved design/quality of scuba gear
3) Dive computers...
What does SCUBA stand for? - ACCURATE ANSWERS✔✔ Self
Contained
Underwater
Breathing
Apparatus
List the three important scuba diving changes that occurred in the 1950s
- ACCURATE ANSWERS✔✔ 1) Dive tables published for repetitive
dives
2) Improved design/quality of scuba gear
3) Dive computers commercially available
Name three different devices that modern dive computers replace -
ACCURATE ANSWERS✔✔ Depth gauge, dive tables, watch
What sets SDI apart from other training agencies? - ACCURATE
ANSWERS✔✔ Students use a personal dive computer for all instruction
and certification dives
How much larger and closer do objects appear under water and why? -
ACCURATE ANSWERS✔✔ 33% larger, 25% closer
, Light bends in the air-space between the lens and your eyes.
How much faster does sound move through water than air and why? -
ACCURATE ANSWERS✔✔ 4 times faster in water
Water is 800x denser than air; sound travels through denser mediums at
faster rates
What is the first color absorbed underwater? - ACCURATE
ANSWERS✔✔ RED (followed by OYGBIV)
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. - ACCURATE ANSWERS✔✔ Slack
If you are caught in a rip current, first swim _____ to the current to get
out of it before swimming towards shore. - ACCURATE ANSWERS✔✔
Perpendicular
Start your dive by swimming ____ the current - ACCURATE
ANSWERS✔✔ into/against
Global currents are _____.
Local currents ____. - ACCURATE ANSWERS✔✔ Fixed
Fluctuate
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