EC55, en-route, Hong Kong China, 2003 (On 26 August 2003, at night, a Eurocopter EC155, operated by Hong Kong Government Flight Service (GFS), performing a casualty evacuation mission (casevac), impacted the elevated terrain in Tung Chung Gap near Hong Kong International airport.) Another important factor for dark adaptation is the effects of nighttime hypoxia, since low oxygen levels have a much greater detrimental effect on night vision than day visual acuity. Without breathing supplemental oxygen in an unpressurized airplane at night there is at least a 35% reduction in visual acuity even at lower altitudes. It’s necessary to start using supplemental oxygen at only a few thousand feet MSL to preserve your nighttime visual acuity. For similar reasons cigarette smoking degrades dark adaptation for night vision since the hypoxic effect of carbon monoxide is additive to hypoxia as altitude increases. That’s why the USAF actually prohibits smoking for three hours before a night mission. Night landings are further complicated by the difficulty of judging distance and the possibility of confusing approach and runway lights: In fact, any of the above choices could be correct. The issue at hand is that the sight picture of the runway lights alone is not always sufficient to ensure a safe visual approach path to the runway. Additional information or further visual cues can be required. Defences Many users who replied to the Tweet were impressed by the unnamed kid's thoughtfulness and ability to understand the concept of death at such a young age. (How many first graders would peg death as "the beginning of eternity?")

Sensory illusions can happen both during the day and at night. Types of sensory illusions that occur primarily or exclusively at night are often called night flying illusions. Ernest Hemingway said it a lot better: “The things of the night cannot be explained in the day, because they do not then exist.” Night flying is really IFR flying and we need to use all of our IFR skills to assure safety during nighttime ops. panel A is the sight picture for an aircraft on a standard glide path to a down-sloping runway, panel B for an aircraft on a standard glide path to a level runway and panel C for an aircraft on a standard glide path to an up-sloping runway; orUnder certain conditions, approach lights can make the aircraft seem higher in a turn to final than when its wings are level

Is there a published circuit altitude and is that above or below the minimum circuit height dictated by the Company Ops Manual? Next is white balancing. With your white balance, you want your temperatures to run cooler. To do this, set your white balance at 3200K. At this temperature, your white balance achieves a moonlight look. You whites need to have a cooler, blueish look. Since moonlight is often thought to have a blue hue to it, it helps sell the illusion. Post-production If the runway has a city in the distance on higher terrain, the tendency will be to fly a lower-than-normal approachUnless the pilot is intimately familiar with the airfield, thorough pre-approach study and preparation is required. The list of potential questions is almost endless but the pilot must concern himself with the following issues before commencing the approach: The runway can seem out of position (down-sloping or up-sloping) and, in the worse case, results in landing short of the runway