pattern+of+lights

runway n 2. самопроизвольное отклонение active runway align the aircraft with the runway all-service runway asphaltic runway surface autopilot runway available runway length basic runway length clear runway status clear the runway closed runway concrete runway concrete runway surface contaminate runway cross-sloped runway crushed stone runway surface damp runway delimit the runway delineate the runway dirt runway surface displaced runway threshold downhill runway dry runway dry runway status duty runway end of runway favourable runway orientation flooded runway foam a runway grading of runway grass runway surface gravel runway surface grooved runway surface hard-surface runway have the runway in sight high intensity runway lights humped runway ice-bound runway idle runway instrument runway landing runway leave the runway macadam runway surface magnetic orientation of runway main runway maintained runway noise preferential runway noninstrument runway nonprecision approach runway operational runway overflying the runway overrun the runway passing over the runway paved runway porous runway surface portion of a runway precipitation-covered runway (после выпадения атмосферных осадков) precision approach runway primary runway regular runway rigid pavement runway rising runway indicator run off the runway runway acceptance rate runway access taxiway runway alignment runway alignment indicator runway alignment indicator lights runway approach surveillance radar runway arrester runway arresting gear runway boundary beacon runway capacity runway category runway center line runway centerline runway centerline lights runway centerline marking runway classification system runway cleaner runway clearance light runway controlled runway control van runway designation marking runway direction runway drainage course runway edge runway edge lights runway edge marker runway edge marking runway elevation runway end identifier lights runway end lights runway end safety area runway end safety area lights runway environment runway extension runway extremity runway floodlight runway flush light runway friction characteristic runway gradient runway guard lights runway heading runway hidden hazard runway identifier lights runway intersection runway intersection sign runway jointing sealant runway leading edge runway lead-in lighting system runway lead-in lights runway length runway level runway lighting runway lighting system runway lighting unit runway marking runway orientation runway pattern runway pattern symbol runway performance runway presentation runway profile runway shoulder runway slope runway slope grid runway strip (включает ВПП, концевые и боковые полосы безопасности) runway strip pattern runway subgrade runway surface runway surface condition sensor runway surface evenness runway surface friction runway surface marking runway surface treatment runway sweeper runway threshold lights runway threshold marking runway touchdown lights runway true bearing runway turning bay runway usability factor runway usable distance runway user charge runway visibility runway visual length runway visual range runway visual range observation runway wearing course runway width secondary runway simultaneous use of runways slippery runway slope on runway smooth runway smooth runway surface snow-covered runway sodded runway soft-surface runway stabilizer runway takeoff runway the runway is clear the runway is not clear turf runway unpaved runway water-covered runway wet runway wet runway status wrong runway zero runway slope

approach n abbreviated visual approach advisory approach aerodrome approach aerodrome approach aids aerodrome approach area aerodrome approach chart aerodrome approach control system aerodrome approach lights aerodrome approach road aeronautical approach chart aids to approach angle of approach angle of approach light approach angle correction approach angle indicator approach area approach area hazard approach azimuth approach azimuth antenna approach azimuth guidance approach beacon approach beam approach ceiling approach chart approach clearance approach computer approach control approach controller approach control point approach control radar approach control service approach control tower approach control unit approach course approach elevation antenna approach end approach facilities approach final approach fix approach flight reference point approach flight track distance approach flow approach funnel approach glide approach glide slope approach guidance nose-in to stand system approach heading approach height approach idle approach information approaching aircraft approach landing approach leg approach light beacon approach lighting approach lighting system (к ВПП) approach lights approach lights collision approach mass correction approach measurement distance approach navigation approach noise angle approach noise level approach noise measurement approach noise path approach noise reference point approach operation approach path approach pattern approach phase approach procedure approach profile approach radar system approach rate of descent approach sector approach segment approach sequence approach setting approach slope guidance approach slope indicator approach speed approach system approach technique approach terrain approach test procedure approach the beam approach threshold lights approach time approach to land procedures approach with flaps down approach zone automatic approach automatic approach system azimuth approach path back course approach beam approach beam approach beacon system blind approach center line approach circling approach circling approach area clearance for straight-in approach complete approach contact approach continuous descent approach coupled approach crossbar approach lighting system (к ВПП) crosswind approach curved approach decelerating approach direction of approach discontinue approach discontinued approach discontinued approach climb enter the final approach track execute approach expected approach time final approach final approach altitude final approach fix final approach operation final approach path final approach track flap approach position flat approach front course approach gliding approach ground controlled approach ground-controlled approach procedure head-on approach helicopter approach height initial approach initial approach altitude initial approach fix initial approach segment inner approach lighting instrument approach chart instrument approach course instrument approach landing instrument approach procedure instrument landing approach intermediate approach intermediate approach fix intermediate approach operation land approach landing approach speed left-hand approach localizer approach localizer approach track long approach low-visibility approach measured approach profile miss approach missed approach missed approach azimuth missed approach operation missed approach procedure missed approach procedure track no-aids used approach no-flap approach speed no-flap - no-slat approach speed noise certification approach path nominal approach path nonprecision approach nonprecision approach procedure nonprecision approach runway nonstraight-in approach normal approach no-slat approach speed offset approach one-eighty approach practice low approach precision approach precision approach lighting system precision approach path precision approach path indicator precision approach procedure precision approach radar precision approach radar system precision approach runway precision approach terrain chart procedure approach track radar approach radar approach beacon radar approach control radio approach aids rectangular approach traffic pattern rectangular traffic pattern approach reference approach angle reference approach height right-hand approach runway approach surveillance radar segmented approach segmented approach path selected approach altitude selected approach slope serve approach short approach simple approach simple approach lighting system (к ВПП) standard approach standard approach system standard beam approach system steadiness of approach steady approach steep approach step-down approach straight-in approach straight-in approach path straight-in ILS-type approach surveillance radar approach symmetric thrust approach teardrop approach timed approach upwind approach visual aids to approach visual approach visual approach indicator visual approach slope indicator system visual approach streamline

ˌrekəɡˈnɪʃən сущ.
1) осознание, понимание;
сознание, представление the recognition that something isn't right ≈ осознание того, что что-то не так recognition of pain, danger, fear ≈ осязание боли, ощущение опасности, страха
2) признание;
одобрение( чьих-л. заслуг и т. п.) to give, grant recognition ≈ признавать to give, show no signs of recognition ≈ не подавать признаков одобрения to receive recognition for one's accomplishments from one's colleagues ≈ получить положительные отзывы коллег о своих достижениях to receive universal recognition ≈ получить всеобщее признание. to win, receive, meet with recognition (from the public) ≈ завоевать признание;
добиться, получить признание( публики) general recognition, universal recognition ≈ всеобщее признание growing recognition, wide recognition ≈ растущая популярность;
широкое признание in recognition of ≈ в знак признания Syn: approval, approbation
3) официальное признание а) дип. (законности правительства или независимости страны, тж. diplomatic recognition) de facto recognition de jure recognition official recognition public recognition tacit recognition б) юр. (санкция, утверждение какого-л. факта, статуса, претензии и т. п.) recognition of smb. as lawful heir ≈ признание кого-л. законным наследником guilt recognition ≈ признание вины в) парл. (право голоса, признание права выступления в президиуме)
4) узнавание, определение характерных черт кого-л. или чего-л., виденного или знакомого ранее, или по заданным характеристикам объекта) а) узнавание;
знак узнавания, приветствие( при встрече и т. п.) to escape recognition ≈ остаться неузнанным, инкогнито to give smb. a sign/smile/nod of recognition ≈ узнать и приветствовать кого-л.;
улыбнуться/кивнуть кому-л. в знак приветствия beyond, out of, past recognition ≈ до неузнаваемости a passing recognition ≈ слабое и незаметное приветствие (на ходу) б) псих. узнавание в) воен. обнаружение;
опознавание( цели, объекта и т. п.) recognition lights ≈ мор. опознавательные огни ∙ optical character recognition magnetic ink character recognition Syn: identification г) компьют. распознавание узнавание;
опознавание - * site (биохимия) центр узнавания - my * of him was immediate я сразу узнал его - to escape * остаться неузнанным, сохранить инкогнито - to alter beyond /past/ * изменить или измениться до неузнаваемости сознание, осознание - * of danger осознание опасности - the * that certain things were not true сознание того, что не все это правда признание, одобрение - to win * from the public завоевать признание - he received no * он остался непризнанным - in * of your services в знак признания ваших заслуг - fact which has obtained general * общепризнанный факт (юридическое) официальное признание (факта, претензии и т. п.) ;
утверждение, санкция - * of the child as lawful heir признание ребенка законным наследником - * of the woman as lawful wife признание женщины законной женой - * as a person before the law признание правосубъективности (дипломатическое) признание (суверенитета страны, законности правительства и т. п.) - diplomatic * дипломатическое признание - de facto * признание де-факто - * of belligerency признание воюющей стороной - to extend * to a state признать какое-л. государство - to withold * from a state не признавать какое-л. государство приветствие (при встрече) - he only gave me a passing * он лишь кивнул мне на ходу - he gave me a smile of * он приветствовал меня улыбкой (парламентское) предоставление слова - * of a speaker by the chair предоставление председателем собрания слова желающему выступить( военное) обнаружение, опознавание - target * обнаружение /опознавание/ цели - * and identification system система опознавания самолетов - * lights (морское) опознавательные огни (юридическое) (историческое) расследование;
судебное следствие( о причинах смерти) (компьютерное) распознавание - optical character * оптическое распознавание символов character ~ вчт. распознавание символов collective ~ коллективное признание entry ~ вчт. распознавание ввода feature ~ распознавание признаков mutual ~ взаимное признание optical character ~ вчт. оптическое распознавание символов pattern ~ распознавание образов recognition одобрение ~ опознавание ~ официальное признание (независимости и суверенитета страны) ~ официальное признание ~ подтверждение ~ последующее одобрение, последующее подтверждение ~ предоставление слова (на заседании) ~ предоставление слова ~ признание;
одобрение;
to win (to receive, to meet with) recognition from the public завоевать (получить) признание публики ~ признание ~ вчт. распознавание ~ распознавание ~ санкция ~ узнавание;
опознание ~ утверждение ~ of authorization соглашение о наделении правами revenue ~ одобрение годового дохода speaker ~ распознавание говорящего speech ~ распознавание речи structural pattern ~ вчт. структурное распознавание образов visual ~ распознавание зрительных образов ~ признание;
одобрение;
to win (to receive, to meet with) recognition from the public завоевать (получить) признание публики

landing n land v accuracy landing achieve a smooth landing aerodrome of intended landing aft landing gear aircraft landing aircraft landing measurement system allowable landing weight all-weather landing capability amphibious landing gear angle of landing approach landing arresting landing gear asymmetric thrust landing autoflare landing automatic landing automatic landing system autorotation landing auxiliary landing field bad weather landing balked landing balked landing path be forced landing belly landing below the landing minima bicycle landing gear blind landing blind landing system body landing gear bogie-type landing gear bounced landing bumpy landing cantilever landing gear carry out a landing castor landing gear clear landing collapsed landing gear commence the landing procedure commit landing compulsory landing contact landing conventional takeoff and landing aircraft correct landing crash landing crash landing strip cross-wind landing day landing dead-engine landing dead-stick landing deck landing design landing mass design landing weight direction for landing distress landing downwind landing dummy landing gear electronic landing aids system emergency landing emergency landing gear emergency landing gear extension emergency landing provisions engine-out landing evacuation in crash landing extend the landing gear fail to extend landing gear fail to retract landing gear fear-up landing fee per landing fixed landing gear flap landing position flapless landing flaps landing setting float-type landing gear forced landing forward retracting landing gear four-wheel bogie landing gear free-fall landing gear from landing operations from landing taxiing full-circle landing full-stop landing gear-down landing glide landing glide-path landing system grass landing area ground-controlled landing ground taxi from landing operation hard landing helicopter-type landing hull equipped landing gear improper landing flareout inadvertently retracted landing gear instrument approach landing instrument landing instrument landing approach instrument landing system intended landing intermediate landing inward retracting landing gear kill the landing speed land after procedure land downwind landing accident landing aerodrome landing after last light landing aids landing approach speed landing area facilities landing beacon landing beam landing beside fix landing capability landing capacity landing characteristics landing charge landing chart landing clearance landing clearance confirmation landing conditions landing configuration landing control landing direction-finding station landing direction indicator landing direction indicator lights landing direction lights landing distance landing distance available landing distance with reverse thrust landing field landing flap landing flare landing flare path landing floodlight landing forecast landing gear landing gear bogie landing gear cycle landing gear door landing gear door latch landing gear drop tests landing gear extention time landing gear fairing landing gear fulcrum landing gear indication system landing gear is down and locked landing gear locking pin landing gear malfunction landing gear operating speed landing gear pilot landing gear pilot pin landing gear position indicator landing gear shock strut landing gear spat (не убирающегося в полете) landing gear tread landing gear well landing gear well dome landing gear wheel landing guidance system landing heading landing headlight landing instruction landing lights landing load landing mass landing minima landing noise landing off the aerodrome landing operation landing pattern landing performance landing procedure landing request landing roll landing roll operation landing run landing runway landing sequence landing sign landing site (для вертолетов) landing speed landing strip (с грунтовым покрытием) landing sudden windshift landing system landing technique landing tee landing transition segment landing turn landing water run landing weight landing windshear land into the wind land into wind land on water land the aircraft land vertically lateral drift landing level landing levered landing gear lock the landing gear lock the landing gear down lock the landing gear up lower the landing gear low visibility landing main landing gear main landing gear beam maximum permitted landing weight minimum landing speed night landing nonretractable landing gear nose landing gear nose landing gear door off-field landing overshooting landing overweight landing pancake landing partial flap landing pontoon equipped landing gear power-off autorotative landing power-on landing precision landing prematurely retracted landing gear prepared landing area prepare for landing priority landing prohibition of landing quadricycle landing gear radar landing minima radio-beacon landing system raise the landing gear rearward retracting landing gear rebound landing reduced takeoff and landing aircraft release the landing gear release the landing gear lock retractable landing gear retract the landing gear reverse-thrust landing rough landing run from landing running landing run out the landing gear safe landing semilevered landing gear short landing short takeoff and landing aircraft single-skid landing gear skid-equipped landing gear ski-equipped landing gear smooth landing speed in landing configuration (конфигурации воздушного судна) spot landing stall landing steerable landing gear straight-in landing supplementary landing gear tail-down landing tailwheel landing gear take-off and landing characteristics talk-down landing test landing three-point landing touch-and-go landing trend-type landing tricycle landing gear two-point landing unlatch the landing gear unobstructed landing area upwind landing vertical landing vertical takeoff and landing aircraft visual landing visually judged landing water landing wheel landing gear wheels-down landing wheels-up landing whilst landing wide-track landing gear wind-assisted landing gear wind landing gear zero-zero landing

2) выкладывать
3) линь
4) строка
5) строчка
6) урез
7) футеровать
8) черта
9) веревочный
10) вызывающий
11) <geom.>ось
12) прямая
13) конвейер
14) очередь
15) хвост
16) проводить линию
17) линейчатый
18) ряд
19) трос
20) поточный
21) рядный
22) контур
23) график
24) кривая
25) трубопровод
26) серия
27) футеровка
28) прокладывать
29) проложить
30) обкладывать
31) обложить
32) облицовывать
– absorption line
– aclinic line
– acoustic line
– across line
– address line
– displacement line
– dotted line
– double line
– double-circuit line
– draft line
– drain line
– draw a line
– drive line
– drop-out line
– emission line
– frost line
– fuel line
– full line
– fusion line
– gas line
– generating line
– geodetic line
– get off the line
– glide line
– glue line
– gorge line
– grid line
– half-wave line
– heading line
– heave a line
– heaving line
– heavy line
– hold the line
– ideal line
– impulse line
– incoming line
– indoor gas line
– input line
– instruction line
– intercepting line
– invisible line
– involution on a line
– line image
– line in fraction
– line insulator
– line integral
– line interference
– margin line
– maser line
– matched line
– word line
– zero line
– zeroic line

absorption spectral line — спектральная линия поглощения

acoustic delay line — акустическая линия задержки

acoustical delay line — акустическая линия задержки

aerodynamic center line — линия фокусов

arrange cylinders in line — располагать цилиндр в ряд

artificial delay line — искусственная линия задержки

automatic production line — <industr.> линия автоматическая

cable delay line — кабельная линия задержки

cable line cell — камера кабельной линии

calculated line of resistance — расчетная линия сопротивления

center line of a track — ось пути

clearance of a pole line — высота провода наименьшая

close contour line — замыкать горизонталь

closed vortex line — замкнутая вихревая линия

coaxial supply line — < radio> фидер коаксиальный

coaxial transmission line — коаксиальная линия передачи

comb transmission line — гребенчатая линия

connect across line — включать шунтом к линии

coupled delay line — замедлитель связанный

crystal delay line — кварцевая линия задержки

delay line decoder — дешифратор с линией задержки

delay line equalizer — компенсатор на линии задержки

delay line register — регистр на линях задержки

dissipationless delay line — линия задержки без потерь

doubly straight line — сдвоенная прямая

downstream water line — горизонт нижнего бьефа

draw straight line — проводить прямую

duplex artificial line — балансная линия дуплекса

equalized delay line — линия задержки с корректированной характеристикой

faint spectral line — слабая спектральная линия

fall on straight line — укладываться на прямой

fiber-optics communication line — <commun.> линия связи волоконно-оптическая

ghost spectral line — ложная спектральная линия

half-wave transmission line — полуволновой фидер

have line contact — соприкосновение происходит в линии

helial delay line — спиральная линия задержки

irregular line of a transformation — иррегулярная прямая преобразования

laser emission line — линия излучения лазера

length of scanning line — длина строки

line axle car — автомобиль с карданной передачей

line circuit breaker — линейный выключатель

line contour integral — криволинейный интеграл

line insulator string — гирлянда линейных изоляторов

line interfase module — линейный интерфейсный модуль

line of action of a force — линия действия силы

line of dents of a gear — линия впадин шестерни

line of double curvature — линия двоякой кривизны

line of equal elevation — линия равных высот

line of least resistance — <phys.> линия наименьшего сопротивления

line of precise level — <geod.> линия точного нивелирования

line of rolling contact — линия качения

line repeating coil — трансформатор линейный

line signal detector — детектор линейного сигнала

line standard of meter — штриховая мера длины

line tangent to — касательная к

line up on the approach lights — выходить на огни

line with brick — футеровать кирпич

magnetic line of force — магнитная силовая линия

magnetic north line — полуденная линия

matched transmission line — согласованная линия передачи

mercury delay line — ртутная линия задержки

move in a straight line — двигаться по прямой

multiple delay line — многократная линия задержки

multiple line automaton — многолинейный автомат

multiple resonant line — эндовибратор многоцилиндровый, эндовибратор полицилиндрический

multischedule private line — частная линия связи

neutral line of a groove — нейтральная линия калибра

nickel delay line — никелевая линия задержки

open transmission line — открытая линия передачи

parting line of a mold — линия разъема формы

parting line of a pattern — линия разъема модели

pneumatic long line — пневматический кабель

pole and line fishing — лов крючковыми орудиями

polyphase transmission line — многофазный фидер

raft section line — линейка сплоточных единиц

re-string a power line — менять линии электропередачи

record operator's line — заказная линия

return line hose — шланг отводящий

roll of a production line — сходить с поточной линия

roll parting line — средняя линия валков

scalar line integral — скалярный линейный интеграл

slotted section line — <tech.> линия щелевая

spectral line Q-factor — добротность спектральной линии

spectral line splitting — расщепление спектральных линий

spectral line strength — интенсивность линии спектра

standard delay line — линия эталонной задержки

start of scanning line — фазовое положение

subscriber's line equipment — абонентский комплект

Sumner position line — высотная линия положения

surface wave line — < radio> линия поверхностной волны

tapered coaxial line — клинообразный коаксиальный фидер

tapped delay line — <electr.> линия задержки дискретная, секционная линия задержки

terminal line equipment — линейный комплект

top line of type face — верхняя линия шрифта

traninuous line of shafting — трансмиссионная линия

ultrasonic delay line — ультразвуковая линия задержки

upstream water line — горизонт верхнего бьефа

variable delay line — регулируемая линия задержки

video line booster — <phot.> видеоусилитель добавочный

water delay line — водяная линия задержки

water-oil interface line — <energ.> контур водонефтяного контакта

waveguide transmission line — волноводный тракт

wire delay line — проволочная линия задержки

wire line grab — ловильный ерш

abandoned aerodrome aerodrome accumulator plant aerodrome adverse weather aerodrome air picture aerodrome alerting procedure aerodrome alerting service aerodrome alert measures aerodrome alert room aerodrome alert status aerodrome alert system aerodrome altitude aerodrome approach aerodrome approach aids aerodrome approach area aerodrome approach chart aerodrome approach control system aerodrome approach lights aerodrome approach road aerodrome authority aerodrome beacon aerodrome boundary aerodrome calm aerodrome category aerodrome chart aerodrome check point aerodrome checkpoint aerodrome check-point sign aerodrome circle aerodrome circling aerodrome circuit aerodrome circuit-circling aerodrome climatographical table aerodrome climatological summary aerodrome complex aerodrome conditions aerodrome control aerodrome control communication aerodrome controlled zone aerodrome controller aerodrome control point aerodrome control radar aerodrome control radio aerodrome control sector aerodrome control service aerodrome control tower aerodrome control tower clearance aerodrome control unit aerodrome culture aerodrome directory aerodrome drainage aerodrome drainage system aerodrome elevation aerodrome emergency aerodrome emergency exercise aerodrome emergency planning aerodrome emergency service aerodrome engineering aerodrome engineering instructor aerodrome environment aerodrome environs aerodrome fencing aerodrome flight information service aerodrome forecast aerodrome forecast material aerodrome graded area aerodrome ground profile aerodrome ground signal aerodrome ground visibility aerodrome handing capacity aerodrome hazard beacon aerodrome identification aerodrome identification sign aerodrome in question aerodrome ladndmark aerodrome lavatory track aerodrome lavatory truck aerodrome layout aerodrome level aerodrome lighting aerodrome locating beacon aerodrome marking system aerodrome marshaller aerodrome master plan aerodrome meteorological minima aerodrome minima aerodrome movement area aerodrome network aerodrome observation aerodrome obstruction chart aerodrome of call aerodrome of departure aerodrome of intended landing aerodrome of origin aerodrome operating minima aerodrome operation aerodrome pavement aerodrome pressure aerodrome reference code aerodrome reference point aerodrome reference temperature aerodrome report aerodrome rules Aerodromes, Air Routes and Ground Aids Section (ИКАО) aerodrome security lighting aerodrome service (диспетчерское) aerodrome service road aerodrome site aerodrome snow windrow aerodrome strip aerodrome strip marker aerodrome surveillance radar aerodrome taxi circuit aerodrome traffic aerodrome traffic circuit aerodrome traffic circuit operation aerodrome traffic control zone aerodrome traffic pattern aerodrome traffic zone aerodrome usability aerodrome usability factor aerodrome utilization factor aerodrome utilization rate aerodrome vehicle operation aerodrome visual aids aerodrome warning aerodrome wind distribution aerodrome wind rose aerodrome wind shift aerodrome wind sock all-weather aerodrome alternate aerodrome arrival aerodrome arrive over the aerodrome auxiliary aerodrome base aerodrome carry out a circuit of the aerodrome categorized aerodrome circle the aerodrome civil aerodrome coastal aerodrome concrete-surfaced aerodrome controlled aerodrome debarkation aerodrome depot aerodrome destination aerodrome domestic aerodrome embarkation aerodrome emergency aerodrome en-route aerodrome entry into the aerodrome zone factory aerodrome familiar aerodrome final aerodrome fog-plagued aerodrome get into the aerodrome given aerodrome grass aerodrome hard surface aerodrome helicopter aerodrome high-level aerodrome home aerodrome identify the aerodrome from the air intermediate aerodrome jet aerodrome joint civil and military aerodrome key aerodrome land aerodrome landing aerodrome landing off the aerodrome layout of aerodrome markings local aerodrome logistics aerodrome main aerodrome military aerodrome municipal commercial aerodrome nonradar aerodrome operate from the aerodrome operational aerodrome participating aerodrome permanent aerodrome principal aerodrome provisional aerodrome receiving aerodrome refuelling aerodrome regular aerodrome reserve aerodrome rigid pavement aerodrome satellite aerodrome supplementary aerodrome takeoff aerodrome temporary aerodrome terminal aerodrome test aerodrome training aerodrome uncontrolled aerodrome unfamiliar aerodrome unmarked aerodrome obstructions unpaved aerodrome X-type aerodrome

marking n aerodrome marking system aircraft stand marking airport marking airway marking basic marking pattern checkpoint marking closed marking day marking system (объектов в районе аэродрома) dye marking fixed distance markings ground marking instruments marking layout of aerodrome markings lights marking marking of pavements mark out mark the obstacle mark time obstruction marking obstruction marking criteria package marking prethreshold marking runway centerline marking runway designation marking runway edge marking runway marking runway surface marking runway threshold marking side strip marking taxi-holding position marking taxiway centerline marking taxiways intersection marking time marking touchdown zone marking transferred marking