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SDI Open Water Questions and Answers | Latest Update 2024/2025
SDI Open Water Questions and Answers | Latest Update 2024/2025
[Show more]SDI Open Water Questions and Answers | Latest Update 2024/2025
[Show more]Describe all the steps to assemble a BCD and regulator to a scuba cylinder. 
 ~~> Spin the tank around so that the back of the valve is facing you. 
Place the BCD band(s) over the top of the cylinder so that the back of 
the BCD is facing you. Raise or lower the BCD so the top is even with 
th...
Preview 3 out of 26 pages
Add to cartDescribe all the steps to assemble a BCD and regulator to a scuba cylinder. 
 ~~> Spin the tank around so that the back of the valve is facing you. 
Place the BCD band(s) over the top of the cylinder so that the back of 
the BCD is facing you. Raise or lower the BCD so the top is even with 
th...
Objects under water appear 
 ~~> Closer and larger than they do on land 
How much faster does sound travel in water, compared to air? 
 ~~> 4 times 
Water conducts heat away from your body 
 ~~> 25 times faster than air does 
As you descend 
 ~~> colors fade, reds and oranges fade first,...
Preview 2 out of 14 pages
Add to cartObjects under water appear 
 ~~> Closer and larger than they do on land 
How much faster does sound travel in water, compared to air? 
 ~~> 4 times 
Water conducts heat away from your body 
 ~~> 25 times faster than air does 
As you descend 
 ~~> colors fade, reds and oranges fade first,...
What is the absolute pressure (in atm) at 66 feet? 
 ~~> 2 atm 
What will be the volume in a ball that is filled with two cubic feet of air at 99 
feet when it's taken to the surface? 
 ~~> 8 cubic feet 
How many more times dense is the air in a balloon at 4 atm compared to the 
air density...
Preview 3 out of 19 pages
Add to cartWhat is the absolute pressure (in atm) at 66 feet? 
 ~~> 2 atm 
What will be the volume in a ball that is filled with two cubic feet of air at 99 
feet when it's taken to the surface? 
 ~~> 8 cubic feet 
How many more times dense is the air in a balloon at 4 atm compared to the 
air density...
Objects under water appear 
→ Closer and larger than they do on land 
How much faster does sound travel in water, compared to air? 
→ 4 times 
Water conducts heat away from your body 
→ 25 times faster than air does 
As you descend 
→ colors fade, reds and oranges fade first, 30 meters seem ...
Preview 3 out of 18 pages
Add to cartObjects under water appear 
→ Closer and larger than they do on land 
How much faster does sound travel in water, compared to air? 
→ 4 times 
Water conducts heat away from your body 
→ 25 times faster than air does 
As you descend 
→ colors fade, reds and oranges fade first, 30 meters seem ...
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