BSAC sports diver theory
When can a sports diver dive with an ocean diver or another sports diver? - Answer-In conditions
already encountered by the ocean diver during their training and under the supervision of a dive
manager.
What's the initial limited depth for a sports diver? - Answer-20m
What's the progressively extended depth of a sports diver? - Answer-35m
Is a neap tide small or large? - Answer-Small
Is a spring tide small or large? - Answer-Large
What causes a neap tide? - Answer-When the Moon is at a right angle to Earth and the Sun, creating the
least amount of gravitational pull in one direction, creating weak tides.
What causes spring tides? - Answer-The gravity of the sun and moon pull in the same direction, creating
strong tides.
Neap tides coincide with what? - Answer-The quarters of the moon
Spring tides coincide with what? - Answer-New and full moon
,What's the average tide cycle in most places? - Answer-12 hours
How many tide cycles in a day? - Answer-2
How many high tides in a day? - Answer-2
How many low tides are there in a day? - Answer-2
How many times do spring tides occur in a lunar month? - Answer-2
How many times do neap tides occur in a lunar month? - Answer-2
What's the tidal range? - Answer-High water - low water
What's slack water? - Answer-At the tides turning point, when the water speed is at its slowest.
What can make diving on a static site (e.g. a wreck) safer? - Answer-Diving in slack water
What is ground swell? - Answer-When wind causing wave action on the surface can be felt on the sea
bed.
When is ground swell the roughest? - Answer-When the surface winds go against the
tide/stream/current flow.
Is an incoming or outgoing tide better for visibility? - Answer-Incoming
, What are five factors that can affect visibility? - Answer-- bad weather
- tides
- being close to river estuaries
- lots of phytoplankton + zooplankton (most likely to be a problem in spring in most places.)
-disturbance by divers.
What's a thermocline? - Answer-Sudden change in temperature, may look oily/ shiny and produce a
change in visibility
What can you do to reduce the effect of glare on the surface (as a boat crew member, not a diver?) -
Answer-- wear polarised sunglasses
- position the boat with the sun behind you
What are four things you should take into account when doing a risk assessment? - Answer-Conditions,
depth, breathing gas and equipment
As neoprene wetsuits compress, there is a loss of what? - Answer-Thermal insulation
What precautions can you take to minimise the risk of a dive to yourself and your buddy? - Answer--
don't dive if you're unsure
- service equipment
- back up supply of gas
- pre agreed narcosis check (at agreed depth or gas level)
- practiced rescue skills
-
When can a sports diver dive with an ocean diver or another sports diver? - Answer-In conditions
already encountered by the ocean diver during their training and under the supervision of a dive
manager.
What's the initial limited depth for a sports diver? - Answer-20m
What's the progressively extended depth of a sports diver? - Answer-35m
Is a neap tide small or large? - Answer-Small
Is a spring tide small or large? - Answer-Large
What causes a neap tide? - Answer-When the Moon is at a right angle to Earth and the Sun, creating the
least amount of gravitational pull in one direction, creating weak tides.
What causes spring tides? - Answer-The gravity of the sun and moon pull in the same direction, creating
strong tides.
Neap tides coincide with what? - Answer-The quarters of the moon
Spring tides coincide with what? - Answer-New and full moon
,What's the average tide cycle in most places? - Answer-12 hours
How many tide cycles in a day? - Answer-2
How many high tides in a day? - Answer-2
How many low tides are there in a day? - Answer-2
How many times do spring tides occur in a lunar month? - Answer-2
How many times do neap tides occur in a lunar month? - Answer-2
What's the tidal range? - Answer-High water - low water
What's slack water? - Answer-At the tides turning point, when the water speed is at its slowest.
What can make diving on a static site (e.g. a wreck) safer? - Answer-Diving in slack water
What is ground swell? - Answer-When wind causing wave action on the surface can be felt on the sea
bed.
When is ground swell the roughest? - Answer-When the surface winds go against the
tide/stream/current flow.
Is an incoming or outgoing tide better for visibility? - Answer-Incoming
, What are five factors that can affect visibility? - Answer-- bad weather
- tides
- being close to river estuaries
- lots of phytoplankton + zooplankton (most likely to be a problem in spring in most places.)
-disturbance by divers.
What's a thermocline? - Answer-Sudden change in temperature, may look oily/ shiny and produce a
change in visibility
What can you do to reduce the effect of glare on the surface (as a boat crew member, not a diver?) -
Answer-- wear polarised sunglasses
- position the boat with the sun behind you
What are four things you should take into account when doing a risk assessment? - Answer-Conditions,
depth, breathing gas and equipment
As neoprene wetsuits compress, there is a loss of what? - Answer-Thermal insulation
What precautions can you take to minimise the risk of a dive to yourself and your buddy? - Answer--
don't dive if you're unsure
- service equipment
- back up supply of gas
- pre agreed narcosis check (at agreed depth or gas level)
- practiced rescue skills
-
