BSAC sports diver theory EXAM QUESTIONS
SOLVED 100% CORRECT!!! 2025
When can a sports diver dive with an ocean diver or another sports diver? - ✔✔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? - ✔✔20m
What's the progressively extended depth of a sports diver? - ✔✔35m
Is a neap tide small or large? - ✔✔Small
Is a spring tide small or large? - ✔✔Large
What causes a neap tide? - ✔✔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? - ✔✔The gravity of the sun and moon pull in the same direction,
creating strong tides.
Neap tides coincide with what? - ✔✔The quarters of the moon
Spring tides coincide with what? - ✔✔New and full moon
What's the average tide cycle in most places? - ✔✔12 hours
How many tide cycles in a day? - ✔✔2
,How many high tides in a day? - ✔✔2
How many low tides are there in a day? - ✔✔2
How many times do spring tides occur in a lunar month? - ✔✔2
How many times do neap tides occur in a lunar month? - ✔✔2
What's the tidal range? - ✔✔High water - low water
What's slack water? - ✔✔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? - ✔✔Diving in slack water
What is ground swell? - ✔✔When wind causing wave action on the surface can be felt on the
sea bed.
When is ground swell the roughest? - ✔✔When the surface winds go against the
tide/stream/current flow.
Is an incoming or outgoing tide better for visibility? - ✔✔Incoming
What are five factors that can affect visibility? - ✔✔- 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? - ✔✔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?) - ✔✔- 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? -
✔✔Conditions, depth, breathing gas and equipment
As neoprene wetsuits compress, there is a loss of what? - ✔✔Thermal insulation
What precautions can you take to minimise the risk of a dive to yourself and your buddy? -
✔✔-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
-
What are the four practised rescue skills you'll do as a sports diver? - ✔✔CBL/AS, basic life
support (BLS), rescue breathing (RB), chest compressions (CC)
What's the in water life support sequence? (6) - ✔✔- make bouyant
- shout for help
- extend airway
SOLVED 100% CORRECT!!! 2025
When can a sports diver dive with an ocean diver or another sports diver? - ✔✔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? - ✔✔20m
What's the progressively extended depth of a sports diver? - ✔✔35m
Is a neap tide small or large? - ✔✔Small
Is a spring tide small or large? - ✔✔Large
What causes a neap tide? - ✔✔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? - ✔✔The gravity of the sun and moon pull in the same direction,
creating strong tides.
Neap tides coincide with what? - ✔✔The quarters of the moon
Spring tides coincide with what? - ✔✔New and full moon
What's the average tide cycle in most places? - ✔✔12 hours
How many tide cycles in a day? - ✔✔2
,How many high tides in a day? - ✔✔2
How many low tides are there in a day? - ✔✔2
How many times do spring tides occur in a lunar month? - ✔✔2
How many times do neap tides occur in a lunar month? - ✔✔2
What's the tidal range? - ✔✔High water - low water
What's slack water? - ✔✔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? - ✔✔Diving in slack water
What is ground swell? - ✔✔When wind causing wave action on the surface can be felt on the
sea bed.
When is ground swell the roughest? - ✔✔When the surface winds go against the
tide/stream/current flow.
Is an incoming or outgoing tide better for visibility? - ✔✔Incoming
What are five factors that can affect visibility? - ✔✔- 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? - ✔✔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?) - ✔✔- 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? -
✔✔Conditions, depth, breathing gas and equipment
As neoprene wetsuits compress, there is a loss of what? - ✔✔Thermal insulation
What precautions can you take to minimise the risk of a dive to yourself and your buddy? -
✔✔-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
-
What are the four practised rescue skills you'll do as a sports diver? - ✔✔CBL/AS, basic life
support (BLS), rescue breathing (RB), chest compressions (CC)
What's the in water life support sequence? (6) - ✔✔- make bouyant
- shout for help
- extend airway
