(2) Scanning/Figure Eight Scan. Scanning is the use of off-center vision to observe an area or object and involves moving the eyes in a series of separate movements across the objective area.
• A common method is to move the eyes in a figure eight pattern (see figure 10-14). The eyes are moved in short, abrupt, irregular movements over and around the area. Once a target indicator has been detected, your focus should be concentrated in that area, but not directly at it. Pause a few seconds at each point of observation since the eyes cannot focus on a still object while in motion. You must rest your eyes frequently when scanning since the rods that produce night vision fatigue quickly, generally in about 4-10 seconds.
• While you are observing, there may be periodic blackouts of night vision due to simple fatigue. This is normal and is not a cause for alarm. Night vision will quickly return after the eyes are moved and blinked a few times.
• It is more effective to scan from a prone position or a position closer to the ground than the object being observed. This will create a silhouetted view of the object.
• When scanning an area, look and listen for the same target indicators as in daylight: movement, sound, and improper camouflage.
• Objects in bright moonlight/ starlight cast shadows just as in sunlight.
• Sound always seems to be louder at night than during daylight.
Was this article helpful?