TD 71 Flashcards
Describe the false horizon illusion and how to compensate for it.
when pilot confuses cloud formations with the horizon or ground. Usually occurs when cloud banks are sloping and continue for a some distance. Pilot gets focused inside and when he transfers back out mistakes the clouds for the ground.
- Compensate - Difficult to perceive and goes undetected until the pilot recognizes it, transitions to instruments, and makes necessary corrections.
Describe the fascination (fixation) and how to compensate for it.
Fascination (inside)- Task Saturation- so engrossed with problem in cockpit they fail to properly scan outside.
Fixation (outside)- Target Fixation( ignore orientation cues and focus on an objective or target)
Compensate- Recognition and always maintaining proper scan inside the aircraft and out.
Describe flicker vertigo and how to compensate for it.
- not actually an illusion, created by rotor blades interrupting direct sunlight at a rate of 4-20 cycles per second. ACOL flashing can produce this effect in clouds.
- Compensate- if its acol bothering you turn it off if you are able, if not transfer controls until the feeling subsides.
Describe confusion with ground lights and how to compensate for it.y
-Pilot mistakes ground lights for celestial lights. Illusion prompts pilot to place the aircraft in an unusual attitude to keep the misperceived ground lights above the aircraft.
- Compensate- avoided by referencing the flight instruments and establishing true horizon and attitude.
Describe the height and depth perception and how to compensate for it.
- due to lack of sufficient visual cues causes crew members to lose their depth perception. Brownouts, whiteouts, smoke, and fog can also cause lack of height depth.
-compensate- Avoid by referencing your instruments specifically Altimeters
Describe the size and distance illusion and how to compensate for it.
- false perceptions of distance from an object or the ground, created when a crewmember misinterprets unfamiliar objects size with something they are familiar with.(e.g. making approach in Washington state avg tree 100ft, as opposed to ft rucker avg tree 30 feet)
- Compensate- be familiar with your flight route and where your are going and always cross check instruments
- Describe altered planes of reference and how to compensate for it.
Creates and incaccurate sense of altitude, attitude, or flight path position in relation to an object so great in size it replaces the horizon as the plane of reference.
-Compensate- know your path of flight and your aircrafts limits and doing a good cross check of your instruments and horizon bar.
Describe the relative motion illusion and how to compensate for it.
Falsely perceived self motion in relation to another objects motion.
-Compensate- with solid cross check of instruments.
What is the purpose of the minus blue coating on the NVG’s?
Special coating in the objective lens of ANVIS that filter out lights from the instrument panel and NVG compatible supplemental cockpit lights.
- Makes ANVIS blind to that lighting so glare does not interfere with viewing outside the aircraft.
(ANVIS 6 operation student handout)
How can you determine if your flashlight or other supplemental lighting (lip lights, finger lights etc.) are compatible with NVGs?
The check must be conducted at night, in an aircraft located in an area of low ambient light, such as an LZ, with interior lighting set for NVG operations, and with ANVIS prepared for use.
- Position a reflective material (map sheet, note card, vinyl checklist) approximately 12 to 18 inches from the eyes.
- Shine the supplemental light onto the material.
- With the unaided eye, look at the resultant reflection cast on the windscreen. Observe this same reflection through the ANVIS. An acceptable supplemental light source will not interfere with the operator’s ability to see outside the aircraft using NVGs. The reflection of the light source in the
windscreen may even disappear. If the reflection, glare, or stray light interferes with the ANVIS aided vision of any crewmember the light source is unacceptable.
- Define scintillation.
A faint, random, sparkling effect throughout the image area. Scintillation is a normal characteristic of the image intensifier assembly and should not be confused with emission points. Scintillation is more pronounced under low light conditions. Sometimes called ”video noise.”
