- Effective scanning requires crewmembers to look from right to left or left to right. They should begin scanning at the __________ distance at which an object can be perceived (top) and move _________ toward the aircraft’s position (bottom).
Greatest
Inward
- These are examples of what type of scanning techniques? Why are we supposed to use these types of scanning techniques?
-51. The retina’s light-sensitive elements are unable to perceive images in motion, so crewmembers should use a stop-turn-stop-turn scanning pattern to compensate.
- Define night myopia and what is Dark Focus?
NIght Myopia = Blue wavelengths of light prevail in the visible portion of the spectrum at night. Therefore, slightly nearsighted or myopic individuals viewing blue-green light at night might experience blurred vision.
Dark Focus = When light levels decrease, the eye’s focusing mechanism might move toward a resting position, making the eye more myopic.
- When operating in the ALL IR position for the exterior lights switch, what lights are disabled?
The anticollision lights, cargo hook light, normal position of the searchlight, and landing light are disabled in the ALL IR position. (UH-60M, TM 1-1520-280-10, Para. 2.67.1)
- Additional measure pilots should take to prevent Spatial Disorientation (SD) are? If SD occurs, pilots should?
Never fly without visual reference points (either the actual horizon or artificial horizon provided by the instruments). Trust the instruments. Pilots must never try to fly visual meteorological conditions and IMC at the same time. Avoid fatigue, smoking, hypoglycemia, hypoxia, and anxiety, all of which intensify illusions.
- IAW dATM, If IMC is entered with the _______ ________ or ________ _______ on, SD may occur.
If IMC conditions are entered with the searchlight or landing light on, spatial disorientation may occur.
- What sensory systems are unreliable in flight without the visual system? What percentage does the visual system provide for orientation?
The visual system is the most reliable of the three systems during flight. The vestibular and proprioceptive systems are unreliable in flight without the visual system. The visual system provides 80 percent of orientation.
- Describe the terms EENT and BMNT:
Ambient solar light is usable for a period following sunset and before sunrise. After sunset, the amount of available solar light steadily decreases until the level of light is not usable to the unaided eye. Solar ambient light becomes unusable when the sun is 12 degrees below the horizon or about 48 minutes after sunset. This is end evening nautical twilight (EENT). Before sunrise, solar light becomes usable when the rising sun is 12 degrees below the horizon or about 48 minutes before sunrise, which is begin morning nautical twilight (BMNT).
- Referencing the AIM, describe the colors and color combinations of airport, heliport and military airport beacons:
- White and Green− Lighted land airport. 2. *Green alone− Lighted land airport. 3. White and Yellow− Lighted water airport. 4. *Yellow alone− Lighted water airport. 5. Green, Yellow, and White− Lighted heliport.
NOTE−*Green alone or yellow alone is used only in connectionwith a white−and−green or white−and−yellow beacon display, respectively. (AIM)
- What are your VFR weather minimums at night above and below 1200’ but less than 10,000 MSL in Class G and E airspace?
Class E = Less than 10,000 feet MSL . . . . . 3 statute miles 500 feet below 1,000 feet above 2,000 feet horizontal
G (Rotary Wing) – more than 1,200 ft above surface but less than 10,000 ft MSL Night 3 Statute Miles 500 ft below 1,000 ft above 2,000 ft horizontal
G (Rotary Wing) – 1,200 ft or less above surface (regardless of MSL) Night 1 Statute Miles Clear of clouds
