SCUBA Acronym - ANSWER self-contained underwater breathing apparatus
equalizing mask pressure - ANSWER exhale small amount of air from nose into mask
Types of cylinders - ANSWER Aluminum - less durable but doesn't rust; store open
Steel - more durable but rusts when in contact with water; ...
NAUI open water certification
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SCUBA Acronym - ANSWER self-contained underwater breathing apparatus
equalizing mask pressure - ANSWER exhale small amount of air from nose into mask
Types of cylinders - ANSWER Aluminum - less durable but doesn't rust; store open
Steel - more durable but rusts when in contact with water; store with pressure
* have them inspected once a year
* US size shows volume of compressed air
* "+" indicates 10% pressure overfill
Cylinder valves - ANSWER K valve - most common; regulator and post tightened with O-ring
DIN - large threaded opening; regulator screws into opening (is stronger at 200 bar 3000 psi)
Burst disks - ANSWER allows cylinder to vent excess pressure by bursting disk
Regulators - ANSWER Reduce high pressure of air to the surrounding environmental pressure
i.e. the air you breathe is at body pressure
First stage - ANSWER - high pressure air initially reduced (10 bar above pressure surrounding cylinder)
, - delivered to second stage by low pressure hose
- must have one high pressure post (connects submersible pressure gauge)
Second stage - ANSWER - further reduced air pressure
- attached to mouthpiece
Equipment maintanence - ANSWER - use dust cap over first stage inlet
- rinse with freshwater (DONT press purge button)
- transport with pressure at high altitudes
Watch - ANSWER - need a time device
- must withstand 300 ft and be able to elapse time
Dive computers - ANSWER measures:
bottom time
Max depth
dive time
remaining dive time
Buoyancy compensator (BC) - ANSWER - controls if you sink, float, hover
- controlled by adding or venting air
- types, back flotation, jacket style, horse collars,
integrated weight system: no wight belt
Weights - ANSWER - usually belts or soft weights
- need ability to quick release
- should be 10% of body weight
, Diving suits - ANSWER - skins
- wetsuits
- drysuits
80 - 75 f (short wet suit)
55 - 75 f (full wetsuit)
35 - 55 f (full drysuit
Other equipment - ANSWER - cutting device
- flag
- logbook
- light
- gear bag
Surface marker buoy (SMB) - ANSWER identifies location at surface
Flags - ANSWER USA - red and white
international - blue and white
Snorkeling - ANSWER - snorkel worn on left side of face
- use figure four to put on fins
Surface dives in snorkel gear - ANSWER head first dive
pike dive
tuck dive
shallow water blackout - ANSWER occurs when a person hyperventilates just before submerging
underwater and loses consciousness before resurfacing
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