87 Page Aviation Flight Night Vision

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Night Vision Goggle Academics, 87 pages (slides)
SLIDE TOPICS, SUBTOPICS and CONTENTS: Night Vision Goggle Academics REFERENCES Aircrew Training Manual TC 1-214 Commander’s Guide TC 1-210 TM 1-1520-238-10 w/CH9 NVG –10 w/CH2 Airworthiness Release, Dated July 99 Night Flight Techniques & Procedures    TC 1-204 NVG ACADEMICS Vision, depth perception, and night vision orientation Hemispherical illumination Aircraft modification requirements for NVG flight Night terrain interpretation NVG navigation, to include map preparation Night tactical operations, to include lighting NVG ground and air safety VISION Vision is the most important sense used in flight.  During day or night, IMC or VMC, vision is the sense that makes crew members aware of the position of their aircraft in space.  The eyes can rapidly identify and interpret visual cues during daylight.  During darkness, however, visual acuity is decreased.  Night vision devices improve the capability of the human eye to see at night. ANATOMY OF THE EYE THREE TYPES OF VISION Photopic Vision:  Experienced during daylight or when a high level of artificial illumination exist. Mesopic Vision:  Experienced at dawn, dusk, and during full moon light. Scotopic Vision:  Experienced under low light levels. NIGHT BLIND SPOT VISUAL PROBLEMS DISTANCE ESTIMATION AND DEPTH PERCEPTION MONOCULAR CUES HEMISPHERICAL ILLUMINATION LIGHT SOURCES Natural:  The moon is the most important source of natural light at night.  The stars provide some background illumination. Lunar light:  The moon provides the greatest amount of ambient light at night. Solar:  Ambient solar light is usable for a period following sunset and before sunrise. Artificial:  Lights from cities, automobiles, fires, and flares are normally sources of small amounts of illumination. PHASES OF THE MOON New Moon -  eight days, 0 to 50 percent illumination First Quarter Moon - Seven days,50 percent to slightly less than 100 percent Full Moon - Begins at 100 percent, ends seven days later at 50 percent Third Quarter Moon - Seven days, begins 50 percent, ends 2 percent METEOROLOGICAL EFFECTS Clouds Fog, Dust, Haze, and Smoke Lightning INTRODUCTION TO  NIGHT VISION GOGGLES NVGs greatly improve night vision, but they require some degree of light to function. HISTORY AN/PVS-5 AN/PVS-5 CUT AWAY GM-6 ANVIS AN/AVS-6 COMPONENTS BATTERIES WARNING DO NOT HEAT, PUNCTURE,  DISASSEMBLE, SHORT CIRCUIT, ATTEMPT TO RECHARGE, OR OTHERWISE TAMPER WITH THE BATTERIES. DUAL BATTERY PACK G1 / G2 / G3 CLIP-ON POWER SOURCE (COPS) OPERATIONAL SEQUENCE NIGHT VISION GOGGLES Image Intensifier is an electronic device that amplifies light energy. EYEPIECE LENS CAUTION ANVIS IS A PRECISION ELECTRO-OPTICAL INSTRUMENT, HANDLE CAREFULLY.  KEEP OBJECTIVE AND EYEPIECE LENS CAPS ON WHEN NOT IN USE. COUNTERWEIGHT SYSTEM Weight Bag Counterweights WEIGHT BAG NECK CORD WARNING Do not attach the lanyard to the flight helmet Note While Hanging the ANVIS by the neck cord, install lens caps on to protect the lenses from being scratched twist the neck cord to allow the NVGs to hang high on the chest. ANVIS CHARACTERISTICS PASSIVE SYSTEM VISUAL ACUITY ASTIGMATISM MAGNIFICATION DEPTH PERCEPTION FIELD OF VIEW (FOV) ANVIS CHARACTERISTICS (CONTINUED) FOCAL RANGE TEMPERATURE RANGE STOWABLE ON THE FLIGHT HELMET WEIGHT BREAKAWAY CAPABILITY LIGHT SPECTRUM AND NVG SENSITIVITY ANVIS MOUNT MECHANICAL CONTROLS VERTICAL ADJUSTMENT KNOB LOCK RELEASE BUTTON BINOCULAR ASSEMBLY MECHANICAL CONTROLS PIVOT AND ADJUSTMENT SHELF EYE-SPAN KNOB FORE AND AFT ADJUSTMENT KNOB TILT ADJUSTMENT LEVER MONOCULAR ASSEMBLY MECHANICAL CONTROLS OBJECTIVE FOCUS RING EYEPIECE FOCUS RING OPERATIONAL CHECKS CHECK MAINTENANCE FORMS AND RECORDS INSPECT THE POWER PACK INSPECT THE VISOR, MOUNT, POWER, CABLE, AND VISOR LINK INSPECT THE BINOCULAR ASSEMBLY PERFORM THE LOW-BATTERY INDICATOR TEST MOUNT THE GOGGLES APPLY PWR AND LOOK FOR GREEN GLOW IN BOTH EYEPIECES CHECK FOR DEFECTS / BLEMISHES AFTER OPERATION CHECKS PLACE THE SWITCH IN THE OFF POSITION REMOVE THE BATTERIES STOW THE POWER PACK IN THE CARRYING CASE WITH THE POWER CABLE FACING UP REPLACE THE LENS COVERS ADJUST THE EYE-SPAN DISTANCE TO ALLOW THE BINOCULAR TO FIT INTO THE CASE INSERT THE OBJECTIVE END FIRST INTO THE CASE RECORD ANY DISCREPANCIES WARNING IF EYEGLASSES ARE WORN, THE UPPER RIMS OF THE EYEGLASSES MAY OBSCURE THE LOW-BATTERY INDICATOR. LOW BATTERY INDICATOR CAUTION TO PREVENT DAMAGE TO THE I2, ALWAYS SET THE POWER PACK SWITCH POSITION OFF BEFORE CHANGING BATTERIES, CONNECTING THE POWER PACK TO THE VISOR OR MOUNTING THE ANVIS. IF THE ANVIS IS FORCED ON TO THE MOUNT ASSEMBLY INCORRECTLY (UPSIDE DOWN OR BACKWARDS), DAMAGE TO THE VISOR MOUNT COULD RESULT. CAUTION DO NOT ATTEMPT TO FLIP-UP OF FLIP-DOWN THE BINOCULAR WITHOUT USING THE LOCK-RELEASE BUTTON.  THE BINOCULAR COULD BE DAMAGED OR MAY COME OUT OF THE MOUNT IF THE BUTTON IS NOT USED. FLIP DOWN PROCEDURE FLIP UP PROCEDURE CAUTION DO NOT EXPOSE THE ANVIS TO BRIGHT LIGHTS WHEN THE ANVIS HAS POWER. OPERATE ANVIS ONLY IN A DARKENED ENVIRONMENT. NOTE OSAP OPTICAL SIGHT ADJUSTMENT POINT EYESPAN ADJUSTMENT FOCUSING THE NVG FOCUSING THE NVG Outdoor Focus CAUTION CAUTION TYPES OF VISUAL DEFICIENCIES OPERATIONAL DEFECTS SHADING NOTE EDGE GLOW FLASHING, FLICKERING OR INTERMITTENT OPERATIONS COSMETIC BLEMISHES BRIGHT SPOTS / EMISSION POINTS BLACK SPOTS CHICKEN WIRE IMAGE DISTORTION FIXED-PATTERN NOISE IMAGE DISPARITY OUTPUT BRIGHTNESS VARIATION CLEANING STEPS CAUTION AIRCRAFT MODIFICATIONS AIRCRAFT MODS NIGHT NAVIGATION Navigation is a difficult task to perform at night at terrain flight altitudes because the distance at which an object can be seen is reduced.  To ensure accurate navigation, aircrews must be able to identify man-made or natural features.  Detailed planning and teamwork are key to mission success. NIGHT NAVIGATION Navigation NOE flight Contour flight Low level flight Radio Communications Battlefield light sources Obstructions Terrain En Route data Altitude Changes NIGHT NAVIGATION Avoid: Routes into brightly lit areas Routes taking you near airports Routes over areas with low contrast large bodies of water, fields, snow covered Routes into low angle rising or setting moon SUMMARY Vision, depth perception, and night vision orientatioin Hemispherical illumination Aircraft modification requirements for NVG flight Night terrian interpertation NVG navigation, to include map preparation Night tactical operations, to include lighting NVG ground and air safety

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