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Precision Approach Path Indicator
A precision approach path indicator (PAPI) is a system of Electric light, lights on the side of an airport runway threshold that provides visual descent (aircraft), descent guidance information during final approach. It is generally located on the left-hand side of the runway approximately beyond the landing threshold of the runway. Design and installation A typical engineering design specification for a PAPI light unit is shown below: Optical construction: * Two lamps for redundancy; * Anodized aluminium reflectors; * Red color filter; * One or two lenses; * Lamps and reflectors replaceable without recalibration. Each light unit consists of one or more light sources, red filters and lenses. A color filter may not be necessary with colored LED lights. Each light unit emits a high-intensity beam. The lower segment of the beam is red, and the upper part is white. The transition between the two colours must take place over an angle not greater than three minutes of arc. This cha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PAPI Jersey Airport
Papi or PAPI may refer to: Places * Papi District, an administrative subdivision of Iran * Papı, a village in Azerbaijan * Papi Hills, Andhra Pradesh, India Arts and entertainment * Papi (song), "Papi" (song), a 2011 song by Jennifer Lopez from ''Love?'' * "Papi", a track from the album ''Straight Outta Oz'' by Todrick Hall * Papi (The L Word character), Papi (''The L Word'' character), a character in the TV series ''The L Word'' * Papi (film), ''Papi'' (film), a 2018 Belgian-Ugandan-French film * Papi, a character from the Japanese manga series ''Monster Musume'' * ''Paapi'', a 1977 Indian film by O. P. Ralhan * ''Paapi - Ek Satya Katha'', a 2013 Indian film by Aziz Sejawal PAPI * Performance Application Programming Interface in computer science * Personality and Preference Inventory, a personality measure designed for the workplace * Precision approach path indicator, a visual guidance system for aircraft pilots Other uses * Papi (name), including a list of people with th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pilot-controlled Lighting
Pilot-controlled lighting (PCL), also known as aircraft radio control of aerodrome lighting (ARCAL) or pilot-activated lighting (PAL), is a system that allows aircraft pilots to control the lighting of an airport or airfield's approach lights, runway edge lights, and taxiways via radio. Technical details At some airfields, the airport/aerodrome beacon may also be ARCAL controlled. ARCAL is most common at non-towered airports or little-used airfields where it is neither economical to light the runways all night, nor to provide staff to turn the runway lighting on and off. It enables pilots to control the lighting only when required, saving electricity and reducing light pollution. The ARCAL frequency for most aerodromes is usually the same as the UNICOM/ CTAF frequency, although in some rare cases, a second ARCAL frequency may be designated to control the lighting for a second runway separately. An example of the latter is runway 18/36 at the airport in Sydney, Nova Scotia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Visual Approach Slope Indicator
The visual approach slope indicator (VASI) is a system of lights on the side of an airport runway threshold that provides visual descent guidance information during final approach. These lights may be visible from up to during the day and up to or more at night. Standard VASI Basic visual approach slope indicators consist of one set of lights set up from the start of the runway. Each light is designed so that it appears as either white or red, depending on the angle at which it is viewed. When the pilot is approaching the lights at the proper angle, meaning the pilot is on the glide slope, the first set of lights appears white and the second set appears red. When both sets appear white, the aircraft is too high, and when both appear red it is too low. This used to be the most common type of visual approach slope indicator system; however, it is being phased out and replaced by precision approach path indicators (PAPIs), which are closer together and therefore more effici ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pilot Controlled Lighting
Pilot-controlled lighting (PCL), also known as aircraft radio control of aerodrome lighting (ARCAL) or pilot-activated lighting (PAL), is a system that allows aircraft pilots to control the lighting of an airport or airfield's approach lights, runway edge lights, and taxiways via radio. Technical details At some airfields, the airport/aerodrome beacon may also be ARCAL controlled. ARCAL is most common at non-towered airports or little-used airfields where it is neither economical to light the runways all night, nor to provide staff to turn the runway lighting on and off. It enables pilots to control the lighting only when required, saving electricity and reducing light pollution. The ARCAL frequency for most aerodromes is usually the same as the UNICOM/ CTAF frequency, although in some rare cases, a second ARCAL frequency may be designated to control the lighting for a second runway separately. An example of the latter is runway 18/36 at the airport in Sydney, Nova Scotia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Approach Lighting System
An approach lighting system (ALS) is a lighting system installed on the approach end of an airport runway and consisting of a series of lightbars, strobe lights, or a combination of the two that extends outward from the runway end. ALS usually serves a runway that has an instrument approach procedure (IAP) associated with it and allows the pilot to visually identify the runway environment and align the aircraft with the runway upon arriving at a prescribed point on an approach. Modern approach lighting systems are highly complex in their design and significantly enhance the safety of aircraft operations, particularly in conditions of reduced visibility. Operation The required minimum visibilities for instrument approaches is influenced by the presence and type of approach lighting system. In the U.S., a CAT I ILS approach without approach lights will have a minimum required visibility of 3/4 mile, or 4000 foot runway visual range. With a 1400-foot or longer approach light s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Go-around
In aviation, a go-around is an aborted landing of an aircraft that is on Final_approach_(aeronautics), final approach or has already touched down. A go-around can either be initiated by the pilot flying or requested by air traffic control for various reasons, such as an unstabilized approach or an obstruction on the runway. Etymology The term arises from the traditional use of Airfield traffic pattern, traffic patterns at airfields. A landing aircraft will first join the traffic pattern/circuit and prepare for landing. If for some reason, the pilot decides not to land, the pilot can simply fly back up to traffic pattern altitude/circuit height, and complete another circuit. The term "go-around" is still used even for modern airliners, though they often do not use traditional traffic patterns/circuits for landing, instead using an airport-specific go-around procedure. Reasons for use Initiation of a go-around may be either ordered by air traffic control (normally the local or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Air Traffic Controller
An Air traffic controller (ATC) is a person responsible for the coordination of traffic in their assigned airspace. Typically stationed in area control centers or control towers, they monitor the position, speed, and altitude of aircraft and communicate with the pilots via radio. In addition, controllers ensure safe distances between the different aircraft. The profession is considered to be highly demanding and stressful due to the need for constant reorganization of cognitive processes, flexible adjustments and continuous decision-making, also often while under time pressure. Factors such as unfavorable work schedules, high responsibility and the reliability of equipment further influence workload and stress levels. Despite these challenges, the role offers competitive salaries and strong job security, which are often cited as key benefits. History Origins Air traffic controlling dates to the early 1920s in the United Kingdom (UK); the first Air traffic control, control ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Control Tower
Air traffic control (ATC) is a service provided by ground-based air traffic controllers who direct aircraft on the ground and through a given section of controlled airspace, and can provide advisory services to aircraft in non-controlled airspace. The primary purpose of ATC is to prevent collisions, organise and expedite the flow of traffic in the air, and provide information and other support for pilots. Personnel of air traffic control monitor aircraft location in their assigned airspace by radar and communicate with the pilots by radio. To prevent collisions, ATC enforces traffic separation rules, which ensure each aircraft maintains a minimum amount of 'empty space' around it at all times. It is also common for ATC to provide services to all private, military, and commercial aircraft operating within its airspace; not just civilian aircraft. Depending on the type of flight and the class of airspace, ATC may issue ''instructions'' that pilots are required to obey, or ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Runway Incursion
A runway incursion is an Aviation accidents and incidents, aviation incident involving improper positioning of vehicles or people on any runway, airport runway or its Critical_area_(aeronautics), protected area. When an incursion involves an ''active'' runway being used by arriving or departing aircraft, the potential for a collision hazard or Instrument landing system, instrument landing system (ILS) interference can exist. At present, various runway safety technologies and processes are commonly employed to reduce the risk and potential consequences of such an event. Definition The internationally-accepted definition of a runway incursion is: In the United States, the FAA classifies runway incursions into 3 types, with 5 levels of severity: Analysis Formal study of runway incursions began in the 1980s, following several high-profile Near miss (safety), near misses and fatal collisions of airliners operating on airport surfaces. One of the earliest reports on the topic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Final Approach (aviation)
In aeronautics, the final approach (also called the final leg and final approach leg) is the last leg in an aircraft's approach to landing, when the aircraft is lined up with the runway and descending for landing.Crane, Dale: ''Dictionary of Aeronautical Terms, third edition'', page 213 and 241. Aviation Supplies & Academics, 1997. In aviation radio terminology, it is often shortened to "final". The last section of the final approach is sometimes referred to as short final. In a standard airport landing pattern, which is usually used under visual meteorological conditions (VMC), aircraft turns from base leg to final within one-half to two miles of the airport. For instrument approaches, as well as approaches into a controlled airfield under visual flight rules (VFR), often a "straight-in" final approach is used, where all the other legs are dispensed within. Straight-in approaches are discouraged at non-towered airports in the United States. Approach slope An approach slo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Incandescent Lamp
An incandescent light bulb, also known as an incandescent lamp or incandescent light globe, is an electric light that produces illumination by Joule heating a filament until it glows. The filament is enclosed in a glass bulb that is either evacuated or filled with inert gas to protect the filament from oxidation. Electric current is supplied to the filament by terminals or wires embedded in the glass. A bulb socket provides mechanical support and electrical connections. Incandescent bulbs are manufactured in a wide range of sizes, light output, and voltage ratings, from 1.5 volts to about 300 volts. They require no external regulating equipment, have low manufacturing costs, and work equally well on either alternating current or direct current. As a result, the incandescent bulb became widely used in household and commercial lighting, for portable lighting such as table lamps, car headlamps, and flashlights, and for decorative and advertising lighting. Incandescent b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LED Lamp
An LED lamp or LED light is an electric light that produces light using light-emitting diodes (LEDs). LED lamps are significantly more energy-efficient than equivalent incandescent lamps and fluorescent lamps. The most efficient commercially available LED lamps have efficiencies exceeding 200 lumens per watt (lm/W) and convert more than half the input power into light. Commercial LED lamps have a lifespan several times longer than both incandescent and fluorescent lamps. LED lamps require an electronic LED circuit to operate from mains power lines, and losses from this circuit means that the efficiency of the lamp is lower than the efficiency of the LED chips it uses. The driver circuit may require special features to be compatible with lamp dimmers intended for use on incandescent lamps. Generally the current waveform contains some amount of distortion, depending on the luminaires' technology. The LED lamp market is projected to grow from US$75.8 billion in 2020 to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
