PADI Open Water Diver Certification
Guide
Question 135: alternate air source Answer: An extra second stage you use for
sharing air with a buddy. Attaches in triangle area between chin and hips
Question 136: At a minimum, how many surface signaling devices should I have
with me on a dive? Answer: At least 2 - one audible and one visual
Question 137: bow Answer: The front of the boat
Question 138: BWRAF Answer: BCD, weight, releases, air, final check
Question 139: DIN system Answer: Regulator screws into valve
Question 140: dive computer Answer: Tells you your time and depth underwater
and guides you in keeping dissolved nitrogen in your body within accepted limits
Question 141: first stage Answer: Supplies air to all the other components,
connecting to the cylinder valve by screw or clamp, reduces cylinder pressure to
intermediate pressure (above surrounding pressure)
Question 142: For what 4 purposes might I carry a slate or wet book? Answer:
Communication, to note dive plan limits, to record information during the dive, and
for the unexpected
Question 143: galley Answer: The boat's kitchen area
Question 144: harness/jacket and cylinder band Answer: Holds cylinder on back
Question 145: head Answer: The boat's toilet facilities
Question 146: How close am I supposed to stay to a dive flag? Answer: Within 15
m/50 ft
Question 147: How do dive tables work? Answer: Table 1 assigns a Pressure
Group letter that represents the theoretical amount of residual nitrogen based on
your dive time and depth. Table 2 gives you credit for nitrogen leaving your body
during a surface interval. Table 3 provides reduced no stop times for a repetitive dive
Question 148: How do I avoid gas narcosis and what do I do if it occurs? Answer:
Don't dive too deep and immediately ascend to a shallower depth
, Question 149: How do I be a SAFE diver? Answer: You slowly ascend from every
dive
Question 150: How do I breathe to reduce anxiety when under stress? Answer: Do
NOT breathe faster - keep breathing slowly
Question 151: How do I equalize as I descend? Answer: For ears and sinuses,
pinch your nose and blow gently, or wiggle your jaw and swallow. For mask, blow
into it with nose
Question 152: How do I generally care for scuba equipment? Answer: Rinse
everything in fresh water and dry it in the shade and store in a cool, dry place
Question 153: How do I make a buoyant emergency ascent? Answer: When you
have no air and are very deep, ditch your weights, look up and swim to the surface
making a continuous ahhhhh sound into your regulator
Question 154: How do I make a controlled emergency swimming ascent (CESA)?
Answer: When you have no air and are approximately 6-9 m/20-30 ft from the
surface, look up and swim to the surface making a continuous ahhhhh sound into
your regulator
Question 155: How do I measure/define visibility as a diver? Answer: The distance
you can see horizontally underwater
Question 156: How do I prevent oxygen toxicity? Answer: The higher the oxygen
content, the shallower the depth limit for using it while diving. Don't exceed 40 m/130
ft when diving recreationally
Question 157: How do my buddy and I manage our air supply together while diving?
Answer: Plan your dive around who breathes air the fastest. Subtract your
reserve/ascent supply from your starting pressure to find out how much pressure you
have for the main part of the dive. To be safe, plan to use half your air coming down,
and half coming back
Question 158: How do we conduct the predive safety check? Answer: Using Begin
With Review And Friend (BWRAF)
Question 159: How do you altitude dive? Answer: You start and end your dive at
lower surface pressure at altitude
Question 160: How do you fly or ascend to altitude after diving? Answer: You start
and end your dive at sea level, and then go to lower surface pressure at altitude
Question 161: How does a dive computer or dive table estimate the amount of
nitrogen I absorb during a dive? Answer: By using your dive time and depth
information to calculate the theoretical amount of nitrogen in your body
Guide
Question 135: alternate air source Answer: An extra second stage you use for
sharing air with a buddy. Attaches in triangle area between chin and hips
Question 136: At a minimum, how many surface signaling devices should I have
with me on a dive? Answer: At least 2 - one audible and one visual
Question 137: bow Answer: The front of the boat
Question 138: BWRAF Answer: BCD, weight, releases, air, final check
Question 139: DIN system Answer: Regulator screws into valve
Question 140: dive computer Answer: Tells you your time and depth underwater
and guides you in keeping dissolved nitrogen in your body within accepted limits
Question 141: first stage Answer: Supplies air to all the other components,
connecting to the cylinder valve by screw or clamp, reduces cylinder pressure to
intermediate pressure (above surrounding pressure)
Question 142: For what 4 purposes might I carry a slate or wet book? Answer:
Communication, to note dive plan limits, to record information during the dive, and
for the unexpected
Question 143: galley Answer: The boat's kitchen area
Question 144: harness/jacket and cylinder band Answer: Holds cylinder on back
Question 145: head Answer: The boat's toilet facilities
Question 146: How close am I supposed to stay to a dive flag? Answer: Within 15
m/50 ft
Question 147: How do dive tables work? Answer: Table 1 assigns a Pressure
Group letter that represents the theoretical amount of residual nitrogen based on
your dive time and depth. Table 2 gives you credit for nitrogen leaving your body
during a surface interval. Table 3 provides reduced no stop times for a repetitive dive
Question 148: How do I avoid gas narcosis and what do I do if it occurs? Answer:
Don't dive too deep and immediately ascend to a shallower depth
, Question 149: How do I be a SAFE diver? Answer: You slowly ascend from every
dive
Question 150: How do I breathe to reduce anxiety when under stress? Answer: Do
NOT breathe faster - keep breathing slowly
Question 151: How do I equalize as I descend? Answer: For ears and sinuses,
pinch your nose and blow gently, or wiggle your jaw and swallow. For mask, blow
into it with nose
Question 152: How do I generally care for scuba equipment? Answer: Rinse
everything in fresh water and dry it in the shade and store in a cool, dry place
Question 153: How do I make a buoyant emergency ascent? Answer: When you
have no air and are very deep, ditch your weights, look up and swim to the surface
making a continuous ahhhhh sound into your regulator
Question 154: How do I make a controlled emergency swimming ascent (CESA)?
Answer: When you have no air and are approximately 6-9 m/20-30 ft from the
surface, look up and swim to the surface making a continuous ahhhhh sound into
your regulator
Question 155: How do I measure/define visibility as a diver? Answer: The distance
you can see horizontally underwater
Question 156: How do I prevent oxygen toxicity? Answer: The higher the oxygen
content, the shallower the depth limit for using it while diving. Don't exceed 40 m/130
ft when diving recreationally
Question 157: How do my buddy and I manage our air supply together while diving?
Answer: Plan your dive around who breathes air the fastest. Subtract your
reserve/ascent supply from your starting pressure to find out how much pressure you
have for the main part of the dive. To be safe, plan to use half your air coming down,
and half coming back
Question 158: How do we conduct the predive safety check? Answer: Using Begin
With Review And Friend (BWRAF)
Question 159: How do you altitude dive? Answer: You start and end your dive at
lower surface pressure at altitude
Question 160: How do you fly or ascend to altitude after diving? Answer: You start
and end your dive at sea level, and then go to lower surface pressure at altitude
Question 161: How does a dive computer or dive table estimate the amount of
nitrogen I absorb during a dive? Answer: By using your dive time and depth
information to calculate the theoretical amount of nitrogen in your body
