TD 68

Question 1

WHAT ARE THE UNAIDED NIGHT VISION SCANNING TECHNIQUES USED WITH THE
REDUCED VISUAL ACUITY PRESENT DURING LOWER LIGHT LEVELS?

Answer 1

right to left or left to right, or stop-turn-stop-turn scanning, off center viewing
3-04.93 pg.8-13

Question 2

WHAT CUES HELP YOU COMPENSATE FOR LOSS OF DISTANCE ESTIMATION AND DEPTH PERCEPTION FOR OBJECTS FAR AWAY AT LOW LIGHT LEVELS?

Answer 2

Monocular cues: geometric perspective, retinal image size, aerial perspective, and motion parallax
3-04.93 pg.8-14

Question 3

AS YOU FLY CLOSER TO AN OPEN FIELD, WHAT WILL HAPPEN TO ITS APPARENT SIZE AND WHAT DISTANCE ESTIMATION AND DEPTH PERCEPTION CUE IS THIS?

Answer 3

Its going to look bigger; Geometric perspective, retinal image size.
3-04.93 pg.8-15

Question 4

WHAT DISTANCE ESTIMATION AND DEPTH PERCEPTION CUE EXPLAINS WHEN YOU GO FROM A 10’ HOVER TO AN 80’ HOVER AND YOU ARE NOT ABLE TO DISTINGUISH CLEARLY THE GRASS OR WEEDS IN THE HOVER AREA?

Answer 4

Aerial perspective, loss of detail or texture.

3-04.93 pg.8-18

Question 5

WHAT IS THE PERCEPTION YOU ARE EXPERIENCING WHEN ON AN APPROACH TO A LANDING AREA THAT IS LIT AND DURING THE APPROACH THE LIGHTS DISAPPEAR OR START TO FLICKER?

Answer 5

Retinal image size, overlapping contours or interposition of objects. The flickering is most likely caused by unlit obstacles moving between you and the light and should be treated as barriers.
3-04.93 pg.8-17