DCS
What is DCS caused by?
Nitrogen
Where is your blind spot located?
Optic Disc
What is the full range/color of the low pressure system?
400-450psi / yellow
What are the three levels of awareness?
1. Basic - Perception
2. Intermediate - Comprehension/Understanding
3. Advanced - Prediction
What are the three classifications of disorientations?
Type I: Unrecognized
Type II: Recognized
Type III: Incapacitating
Which type of DCS causes pain at the muscles/joints?
Musculoskeletal manifestations (Bends)
Explain the location and characteristics of rod and cones.
Rods - Most dense parafovea; peripheral vision; gray tones; sensitive to light
Cones - Located in the fovea; require light; allows you to see colors (RGB)
What does 1 unit of LOX equal?
860 units of gaseous oxygen
What are the 5 primary components of SA?
Geographical
Spatial/Temporal
System
Environment
Tactical
Which type of acceleration do the otolith organs detect and which TYPE of illusions are they responsible for?
Linear acceleration; somatogravic illusions
Which type of DCS causes rashes?
Skin (Creeps)
What are the 3 types of vision?
Photopic - Cones; daytime; best acuity/reaction time
Mesopic - rods/cones; dusk/dawn; poor acuity
Scotopic - rods; night vision; two blind spots; poor acuity
How long does the T6 Emergency O2 provide 100% O2 for?
2-4 minutes
What is the IMSAFE checklist?
Illness
Mental
Stress
Alcohol
Fatigue
Eating
Which type of acceleration do the semicircular canals detect and which type of illusion causes these to disorient us?
Angular acceleration; Somatogyral illusions
Which type of DCS causes breathing problems?
Explain the ambient and focal visual fields.
Ambient - 150°, peripheral, rods, subconscious processing
Focal - 3°, cones, conscious processing
What is the full capacity of the Emergency oxygen system?
1800-2500 psi
Name and describe the 4 bodily systems that help orient the body?
Vestibular - linear/angular accelerations
Visual - eyes, most reliable
Auditory - hearing, feedback
Somatosensory - pressure receptors, seat of the pants, least reliable
False pitch up/down, G-excess effect (causes you to bank more than you mean to)
Which type of DCS causes visual disturbances/brain problems?
Neurological (CNS)
What do you do if you encounter a laser threat?
Look away, rely on instruments for aircraft control. Report using LASER acronym
What 3 things does the oxygen flow indicator show?
Gaseous flow, seal/leak, hyperventilating
What two things in the vestibular system cause us to become disoriented?
Otolith organs, semicircular canals
Name and describe somatogyral illusions.
Leans - makes one feel like they're in a bank when they're straight and level; unrecognized can lead to graveyard spin
Coriolis - entering one plane of rotation while already rotating in another
Nystagmus - eye reflex that affects vision