FAA製作的短片，介紹機場進近燈光系統，包括簡易、一類和二類燈光系統。短片應該比較老，看著比我年齡都大，不過介紹非常清晰。了解點進近燈光的知識，學學英文說法。
參考原文：
When instrument approaches are made with relatively high visual ranges and decision heights, a simple approach lighting system is added to the basic runway lighting.
A simple approach lighting system is a row of lights spaced at either 30m or 60m intervals along the extended centerline of the runway and extending 420m into the approach. At 300m from the threshold, there is a crossbar of white lights.
A variation of this system is to use barrettes for the centerline instead of single lights. A barrette is three or more closely spaced lights that appear as a bar of lights.
本系統的一個變體，是在中線上使用短排燈，來代替單燈。
Here, in an actual approach situation, we see the approach centerline lights with roll guidance information provided by the crossbar. This permits us to correct the alignment of the aircraft.
When we pass over the crossbar, we know we will be 300m from the runway. As we near the runway, our attention shifts to the threshold and runway edge lights to complete the landing.
Once again, the simple approach lighting system is adequate only in the better instrument conditions. When weather conditions are worse, a system providing greater visual guidance is required. These are called precision approach lighting systems.
For Category I operations, a precision approach Category I lighting system is required. The lighting system may be one of two standard types shown here.
In both systems, the centerline lights are extended to 900m from the threshold. But the one system uses a row of single lights over the inner 300m, two lights over the center 300m, and three lights over the outer 300m. The lights are always spaced at 30m intervals. Also with this system, crossbars are located at 150m, 300m, 450m, 600m, and 750m. These crossbars may be of equal width, or as you see, vary in width, so that they appear to point towards the runway centerline 300 meters inside the threshold.
More threshold lights are used with Category I systems. Either additional lights are added to the sides, or the lights are extended completely across the threshold at 3m intervals.
Now, we shall see this system under actual conditions. As we approach the runway, we maneuver the aircraft to line up with the centerline. When visibility is restricted, information from the centerline lights tells us that we are in the outer 300m when three lights are visible, in the middle 300m when two lights are visible, and in the final 300m when only one light is to be seen in the centerline.
The other common standard precision approach lighting system used in Category I ILS conditions utilizes barrettes for the full length of the 900m centerline and has only one crossbar at the 300m point before the threshold.
In addition to the centerline barrettes, sequence flashing lights are often used. These extremely bright lights are timed to flash in such order that twice each second, a ball of light appears to move down the centerline towards the threshold. While we are still at a considerable distance from the aerodrome, the sequence flashing lights provide positive identification of the approach lights from other lights in the area.
sequence flashing lights: 順序閃光燈
Precision approach Category I lighting systems are designed for operations down to a 60m decision height and an 800m runway visual range. To go below this, down to a 30m decision height and a 400m runway visual range, a Category II system is needed.
The principal difference between the Category I and II approach lighting systems lies in the inner 300m. The outer 600m may be either of the two systems we just saw. Barrettes are always used for the inner 300m of the centerline of the Category II system.
Added to this are two side rows of red barrettes, a crossbar at 150m and a crossbar at 300m. For the threshold, the green lights are spaced at 3m intervals across the runway width.
two side rows of red barrettes: 指紅色側邊燈
When a pilot is making an approach in Category II conditions, he may see only the inner 300m of the approach lighting system and then only a portion of it at any one time. This is why additional lights have been added in this area, since at this point, only seconds are available to decide if a landing can be made.
The red side rows give unmistakable information as to what part of the system we are looking at. They also help us to judge how far off the centerline we maybe, and thus decide if we can land or should go around.
The red color differentiates the lights from those used on the runway for touchdown zone lights so we will not think we are over the runway and land. The crossbar at 150m lets us know how close we are to the threshold.
這兩段介紹紅色側邊燈的意義：與白色接地帶燈光相區別，幫助飛行員判斷能否接地；幫助飛行員判斷是否偏離跑道中線
The system you see here is standard for all precision approach runways Category II.
機場燈光系統
機場燈光英文怎麼說？