BSAC SPORTS DIVER FINAL EXAM SCRIPT
2026 COMPREHENSIVE QUESTIONS AND
ANSWERS VERIFIED A+
●● Branches vs BSAC centres. Answer: Branches = local club (around
1000 branches around UK and overseas), BSAC centre are training
centres i.e. professional diving schools
●● BSAC organisation structure. Answer: BSAC President, BSAC
Council, National Diving Committee, Regional Coaching Team - BSAC
council made up of elected members who manage BSAC for members -
NDC members appointed for expertise - all unpaid volunteers
●● Ocean diver aim. Answer: Dive in open water to 20m under
supervision of a dive manager in controlled conditions.
●● Discovery diver aim. Answer: 12m depth under direct in water
supervision of a dive leader
●● BSAC council. Answer: committee that manages bsac on behalf of
the members
●● Atmospheric pressure. Answer: Weight of 1 cm square column of air
is 1 kg at sea level - - i.e. 1 bar at sea level
,●● Water pressure. Answer: Water column with area of 1cm2 exerts
downwards pressure of 1 bar for every 10 metres
●● How to measure water pressure. Answer: Depth gauges, gives
reading in metres
●● 10m water pressure and total pressure is. Answer: 1 bar water
pressure and 1 bar atmospheric pressure = 2 bar total pressure
●● 20m water pressure and total pressure is. Answer: 2 bar water
pressure and 1 bar atmospheric pressure = 3 bar total pressure
●● Effect of pressure on air spaces. Answer: 2 bar, volume of air is
halved. 3 bar reduces to 1 third original volume. 4 bar reduces to one
quarter original volume
●● Body water content. Answer: 80 per cent
●● Mask. Answer: Rigid mask frame
Tempered glass
Flexible seal of silicone rubber
Wash your mask in fresh water after each dive - avoid drying in direct
sun as can affect flexibility of silicone rubber
,●● Fins. Answer: Either shoe fin with foot pocket (in warm conditions)
or strap fin (over boots, with strap or spring to keep in place) - wash in
fresh water and dry standing on food pocket end
●● SCUBA acronym. Answer: self contained underwater breathing
apparatus
●● Scuba equipment. Answer: Cylinder
Buoyancy Compensator
Regulator
●● Cylinder working pressures. Answer: 232/300 bar
●● Cylinder material. Answer: Aluminium/steel
Must conform to PRESSURE EQUIPMENT DIRECTIVE (bears the CE
mark)
Type of gas it contains will be written on it
●● SCUBA cylinder testing. Answer: Visual check every 2.5 years
Hydrostatic test every 5 years
●● Cylinder care. Answer: Wash in fresh water
, Store cylinder upright
●● Nitrox 32 mix/Nitrogen 36 mix/air. Answer: 32 - 32% oxygen and
68% nitrogen
36 - 36% O and 64% N
Air - 21% O and 79% N
●● Marking - WC. Answer: how many litres of water the cylinder could
hold
●● WP or CP. Answer: Working pressure - 232 bar or 300 bar
●● TP. Answer: Test pressure - used during hydraulic test
●● CP. Answer: Charging pressure
●● Nitrox cylinders. Answer: Need to be in Oxygen service - oxygen
compatible parts in valves and need periodic cleaning to ensure no
hydrocarbons present (recommended every 15 months)
●● A clamp. Answer: Makes use of an O ring set into the valve outlet
232 bar pressure
2026 COMPREHENSIVE QUESTIONS AND
ANSWERS VERIFIED A+
●● Branches vs BSAC centres. Answer: Branches = local club (around
1000 branches around UK and overseas), BSAC centre are training
centres i.e. professional diving schools
●● BSAC organisation structure. Answer: BSAC President, BSAC
Council, National Diving Committee, Regional Coaching Team - BSAC
council made up of elected members who manage BSAC for members -
NDC members appointed for expertise - all unpaid volunteers
●● Ocean diver aim. Answer: Dive in open water to 20m under
supervision of a dive manager in controlled conditions.
●● Discovery diver aim. Answer: 12m depth under direct in water
supervision of a dive leader
●● BSAC council. Answer: committee that manages bsac on behalf of
the members
●● Atmospheric pressure. Answer: Weight of 1 cm square column of air
is 1 kg at sea level - - i.e. 1 bar at sea level
,●● Water pressure. Answer: Water column with area of 1cm2 exerts
downwards pressure of 1 bar for every 10 metres
●● How to measure water pressure. Answer: Depth gauges, gives
reading in metres
●● 10m water pressure and total pressure is. Answer: 1 bar water
pressure and 1 bar atmospheric pressure = 2 bar total pressure
●● 20m water pressure and total pressure is. Answer: 2 bar water
pressure and 1 bar atmospheric pressure = 3 bar total pressure
●● Effect of pressure on air spaces. Answer: 2 bar, volume of air is
halved. 3 bar reduces to 1 third original volume. 4 bar reduces to one
quarter original volume
●● Body water content. Answer: 80 per cent
●● Mask. Answer: Rigid mask frame
Tempered glass
Flexible seal of silicone rubber
Wash your mask in fresh water after each dive - avoid drying in direct
sun as can affect flexibility of silicone rubber
,●● Fins. Answer: Either shoe fin with foot pocket (in warm conditions)
or strap fin (over boots, with strap or spring to keep in place) - wash in
fresh water and dry standing on food pocket end
●● SCUBA acronym. Answer: self contained underwater breathing
apparatus
●● Scuba equipment. Answer: Cylinder
Buoyancy Compensator
Regulator
●● Cylinder working pressures. Answer: 232/300 bar
●● Cylinder material. Answer: Aluminium/steel
Must conform to PRESSURE EQUIPMENT DIRECTIVE (bears the CE
mark)
Type of gas it contains will be written on it
●● SCUBA cylinder testing. Answer: Visual check every 2.5 years
Hydrostatic test every 5 years
●● Cylinder care. Answer: Wash in fresh water
, Store cylinder upright
●● Nitrox 32 mix/Nitrogen 36 mix/air. Answer: 32 - 32% oxygen and
68% nitrogen
36 - 36% O and 64% N
Air - 21% O and 79% N
●● Marking - WC. Answer: how many litres of water the cylinder could
hold
●● WP or CP. Answer: Working pressure - 232 bar or 300 bar
●● TP. Answer: Test pressure - used during hydraulic test
●● CP. Answer: Charging pressure
●● Nitrox cylinders. Answer: Need to be in Oxygen service - oxygen
compatible parts in valves and need periodic cleaning to ensure no
hydrocarbons present (recommended every 15 months)
●● A clamp. Answer: Makes use of an O ring set into the valve outlet
232 bar pressure
