BSAC Ocean diver
BSAC council - CORRECT ANSWER-committee that manages bsac on behalf of the
members
Atmospheric pressure - CORRECT ANSWER-Weight of 1 cm square column of air is 1
kg at sea level - - i.e. 1 bar at sea level
Water pressure - CORRECT ANSWER-Water column with area of 1cm2 exerts
downwards pressure of 1 bar for every 10 metres
How to measure water pressure - CORRECT ANSWER-Depth gauges, gives reading in
metres
10m water pressure and total pressure is - CORRECT ANSWER-1 bar water pressure
and 1 bar atmospheric pressure = 2 bar total pressure
20m water pressure and total pressure is - CORRECT ANSWER-2 bar water pressure
and 1 bar atmospheric pressure = 3 bar total pressure
Effect of pressure on air spaces - CORRECT 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 - CORRECT ANSWER-80 per cent
Elected commitee - CORRECT ANSWER-Diving officer
Training officer
Chairperson
Treasurer
Secretary
Equipment officer
Branches vs BSAC centres - CORRECT ANSWER-Branches = local club (around 1000
branches around UK and overseas), BSAC centre are training centres i.e. professional
diving schools
BSAC organisation structure - CORRECT 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 - CORRECT ANSWER-Dive in open water to 20m under supervision
of a dive manager in controlled conditions.
,Discovery diver aim - CORRECT ANSWER-12m depth under direct in water supervision
of a dive leader
Mask - CORRECT 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 - CORRECT 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 - CORRECT ANSWER-self contained underwater breathing
apparatus
Scuba equipment - CORRECT ANSWER-Cylinder
Buoyancy Compensator
Regulator
Cylinder working pressures - CORRECT ANSWER-232/300 bar
Cylinder material - CORRECT 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 - CORRECT ANSWER-Visual check every 2.5 years
Hydrostatic test every 5 years
Cylinder care - CORRECT ANSWER-Wash in fresh water
Store cylinder upright
Nitrox 32 mix/Nitrogen 36 mix/air - CORRECT ANSWER-32 - 32% oxygen and 68%
nitrogen
36 - 36% O and 64% N
Air - 21% O and 79% N
Marking - WC - CORRECT ANSWER-how many litres of water the cylinder could hold
WP or CP - CORRECT ANSWER-Working pressure - 232 bar or 300 bar
TP - CORRECT ANSWER-Test pressure - used during hydraulic test
, CP - CORRECT ANSWER-Charging pressure
Nitrox cylinders - CORRECT 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 - CORRECT ANSWER-Makes use of an O ring set into the valve outlet
232 bar pressure
DIN - CORRECT ANSWER-No o ring
Fitted to cylinders up to 300 bar
Can add on a clamp equipment to allow use of regulators equipped with A-clamp
attachment
Not all DIN support all pressure types
M26 - CORRECT ANSWER-USed above 22% oxygen
BCD components - CORRECT ANSWER-Integrated gas bladder filled by direct feed
which connects via an Intermediate pressure hose to the regulator - push button to
inflate BC
Oral inflation mouth piece
Over inflation pressure relief valves
Also has manually operated dump mechanism
-Washed inside and out with fresh water - disinfecting solutions should be used inside
BCD - should be dry and stored slightly inflated - do not breathe from BC
Regulators - CORRECT ANSWER-Deliver air at ambient pressure - first stage reduces
pressure in cylinder to intermediate pressure around 10 bar above ambient - gas
passed down interstage, intermediate pressure hose to regulator second stage-second
stage reduces pressure further to ambient pressure - exhaled air expelled via exhaust
valve - contain a octopus for your buddy/you
-Alternative source is additional second stage regulator connected to first stage - back
up system for diver or buddy - usually marked yellow and stamped with A
-Contents gauge connected via hose to first stage - has to be high pressure hose as it
delivers high pressure gas for gauge to read
-Many designed for use in temperatures above 10 degrees - regulators with Nitrox
should be in Oxygen service
Regulator care - CORRECT ANSWER-Wash while pressurized and connected to
cylinder, do not press purge button while washing with fresh water -dry before storing
Serviced once a year
BSAC council - CORRECT ANSWER-committee that manages bsac on behalf of the
members
Atmospheric pressure - CORRECT ANSWER-Weight of 1 cm square column of air is 1
kg at sea level - - i.e. 1 bar at sea level
Water pressure - CORRECT ANSWER-Water column with area of 1cm2 exerts
downwards pressure of 1 bar for every 10 metres
How to measure water pressure - CORRECT ANSWER-Depth gauges, gives reading in
metres
10m water pressure and total pressure is - CORRECT ANSWER-1 bar water pressure
and 1 bar atmospheric pressure = 2 bar total pressure
20m water pressure and total pressure is - CORRECT ANSWER-2 bar water pressure
and 1 bar atmospheric pressure = 3 bar total pressure
Effect of pressure on air spaces - CORRECT 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 - CORRECT ANSWER-80 per cent
Elected commitee - CORRECT ANSWER-Diving officer
Training officer
Chairperson
Treasurer
Secretary
Equipment officer
Branches vs BSAC centres - CORRECT ANSWER-Branches = local club (around 1000
branches around UK and overseas), BSAC centre are training centres i.e. professional
diving schools
BSAC organisation structure - CORRECT 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 - CORRECT ANSWER-Dive in open water to 20m under supervision
of a dive manager in controlled conditions.
,Discovery diver aim - CORRECT ANSWER-12m depth under direct in water supervision
of a dive leader
Mask - CORRECT 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 - CORRECT 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 - CORRECT ANSWER-self contained underwater breathing
apparatus
Scuba equipment - CORRECT ANSWER-Cylinder
Buoyancy Compensator
Regulator
Cylinder working pressures - CORRECT ANSWER-232/300 bar
Cylinder material - CORRECT 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 - CORRECT ANSWER-Visual check every 2.5 years
Hydrostatic test every 5 years
Cylinder care - CORRECT ANSWER-Wash in fresh water
Store cylinder upright
Nitrox 32 mix/Nitrogen 36 mix/air - CORRECT ANSWER-32 - 32% oxygen and 68%
nitrogen
36 - 36% O and 64% N
Air - 21% O and 79% N
Marking - WC - CORRECT ANSWER-how many litres of water the cylinder could hold
WP or CP - CORRECT ANSWER-Working pressure - 232 bar or 300 bar
TP - CORRECT ANSWER-Test pressure - used during hydraulic test
, CP - CORRECT ANSWER-Charging pressure
Nitrox cylinders - CORRECT 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 - CORRECT ANSWER-Makes use of an O ring set into the valve outlet
232 bar pressure
DIN - CORRECT ANSWER-No o ring
Fitted to cylinders up to 300 bar
Can add on a clamp equipment to allow use of regulators equipped with A-clamp
attachment
Not all DIN support all pressure types
M26 - CORRECT ANSWER-USed above 22% oxygen
BCD components - CORRECT ANSWER-Integrated gas bladder filled by direct feed
which connects via an Intermediate pressure hose to the regulator - push button to
inflate BC
Oral inflation mouth piece
Over inflation pressure relief valves
Also has manually operated dump mechanism
-Washed inside and out with fresh water - disinfecting solutions should be used inside
BCD - should be dry and stored slightly inflated - do not breathe from BC
Regulators - CORRECT ANSWER-Deliver air at ambient pressure - first stage reduces
pressure in cylinder to intermediate pressure around 10 bar above ambient - gas
passed down interstage, intermediate pressure hose to regulator second stage-second
stage reduces pressure further to ambient pressure - exhaled air expelled via exhaust
valve - contain a octopus for your buddy/you
-Alternative source is additional second stage regulator connected to first stage - back
up system for diver or buddy - usually marked yellow and stamped with A
-Contents gauge connected via hose to first stage - has to be high pressure hose as it
delivers high pressure gas for gauge to read
-Many designed for use in temperatures above 10 degrees - regulators with Nitrox
should be in Oxygen service
Regulator care - CORRECT ANSWER-Wash while pressurized and connected to
cylinder, do not press purge button while washing with fresh water -dry before storing
Serviced once a year
