Part 3: Being a Diver III || with Complete Solutions.
What types of environments might I dive in? correct answers - Coral reefs
- Lakes and reservoirs
- Springs
- Human-made
- Temperate water oceans
- Rivers
- Flooded quarries
What six general environmental conditions can affect me while diving? correct answers -
Temperature
- Visibility
- Water movement
- Bottom composition
- Aquatic life
- Sunlight
How can I expect depth to affect water temperature? correct answers - Water gets colder as you
go deeper
- Water forms distinct layers based on temperature
- Boundary between a warmer upper layer and cooler deeper layer - thermocline
How do I measure (define) visibility as a diver? correct answers - Measure visibility as the
distance you can see horizontally underwater
What four principal factors affect visibility? correct answers - Water movement
- Waves, current and fin kicks (stir up sediment)
- Weather
- Wind or rain increases sediment
- Plankton
- Bottom composition
In what three ways can I reduce visibility affect me while diving? What do I do about them?
correct answers - More difficult to stay with you buddy
- Stay close and watch each other
- Makes it harder to track where you are and where you're going
- Use your compass and navigation references
- Cause disorientation when descending and ascending
- Follow a reference down and up or use your dive computer
How do I avoid the potential problems of diving in clear water? correct answers - Potential to go
too deep- monitor your dive computer as you descend
- Experience disorientation and vertigo when descending and ascending
- Get too far from your buddy- able to reach other within two seconds
, What two types of water movement primarily affect me as a diver? correct answers - Waves
- Wind blowing over the surface
- Affect surface swimming
- Current
- Results from waves, water heating and cooling, the Earth's rotation and tides
When diving in a mild current in what direction would I normally go? Why? correct answers -
Swim against a mild current on the bottom
- When starting the dive against the current when you turn the dive the current will push you
back
What do I do if I'm caught in a current and am carried downstream from where I planned to dive
or exit the water? correct answers - Swim across the current
What should I do if I get caught in a surface current while diving from a boat and find myself
unable to swim to the boat? correct answers - Remain calm
- Inflate your BCD
- Signal the boat
- Wait to be picked up
What are five types of bottom compositions I'm likely to find while diving? correct answers - Silt
and mud
- Sand
- Rock
- Coral
- Vegetation
What three reasons why it is beneficial to avoid bottom contact? correct answers - Keeps the
water clearer
- Avoid injuries
- Avoid damaging or destroying aquatic life
How do I avoid contact with the bottom? correct answers - Stay neutrally buoyant
- Stay streamlined and don't allow gear to drag
- Rest only on your fin tips or with light finger contact on an insensitive area
- Know what kind of bottom you'll wade through during entries and exits
How does sunlight affect me as a diver correct answers - How much light you have underwater
- How warm you are
- Your eyes - protect with good quality sunglasses
- Sunburn
How can I avoid sunburn? correct answers - Wear protective clothing
- Stay in shade
- Use sunscreen
What types of environments might I dive in? correct answers - Coral reefs
- Lakes and reservoirs
- Springs
- Human-made
- Temperate water oceans
- Rivers
- Flooded quarries
What six general environmental conditions can affect me while diving? correct answers -
Temperature
- Visibility
- Water movement
- Bottom composition
- Aquatic life
- Sunlight
How can I expect depth to affect water temperature? correct answers - Water gets colder as you
go deeper
- Water forms distinct layers based on temperature
- Boundary between a warmer upper layer and cooler deeper layer - thermocline
How do I measure (define) visibility as a diver? correct answers - Measure visibility as the
distance you can see horizontally underwater
What four principal factors affect visibility? correct answers - Water movement
- Waves, current and fin kicks (stir up sediment)
- Weather
- Wind or rain increases sediment
- Plankton
- Bottom composition
In what three ways can I reduce visibility affect me while diving? What do I do about them?
correct answers - More difficult to stay with you buddy
- Stay close and watch each other
- Makes it harder to track where you are and where you're going
- Use your compass and navigation references
- Cause disorientation when descending and ascending
- Follow a reference down and up or use your dive computer
How do I avoid the potential problems of diving in clear water? correct answers - Potential to go
too deep- monitor your dive computer as you descend
- Experience disorientation and vertigo when descending and ascending
- Get too far from your buddy- able to reach other within two seconds
, What two types of water movement primarily affect me as a diver? correct answers - Waves
- Wind blowing over the surface
- Affect surface swimming
- Current
- Results from waves, water heating and cooling, the Earth's rotation and tides
When diving in a mild current in what direction would I normally go? Why? correct answers -
Swim against a mild current on the bottom
- When starting the dive against the current when you turn the dive the current will push you
back
What do I do if I'm caught in a current and am carried downstream from where I planned to dive
or exit the water? correct answers - Swim across the current
What should I do if I get caught in a surface current while diving from a boat and find myself
unable to swim to the boat? correct answers - Remain calm
- Inflate your BCD
- Signal the boat
- Wait to be picked up
What are five types of bottom compositions I'm likely to find while diving? correct answers - Silt
and mud
- Sand
- Rock
- Coral
- Vegetation
What three reasons why it is beneficial to avoid bottom contact? correct answers - Keeps the
water clearer
- Avoid injuries
- Avoid damaging or destroying aquatic life
How do I avoid contact with the bottom? correct answers - Stay neutrally buoyant
- Stay streamlined and don't allow gear to drag
- Rest only on your fin tips or with light finger contact on an insensitive area
- Know what kind of bottom you'll wade through during entries and exits
How does sunlight affect me as a diver correct answers - How much light you have underwater
- How warm you are
- Your eyes - protect with good quality sunglasses
- Sunburn
How can I avoid sunburn? correct answers - Wear protective clothing
- Stay in shade
- Use sunscreen
