basic limitation

- arms limitations
- basic limitations
- budget limitation
- censorship limitations
- export limitation
- family limitation
- import limitation
- limitation of nuclear arms
- limitation of production
- limitation of rights
- limitation of strategic offensive arms
- limitation on rights
- limitations on the amount of baggage
- strategic armaments limitation
- strategic arms limitation
- travel limitations

ˈpɪərɪəd
1. сущ.
1) период;
промежуток времени, срок for a period ≈ на время extra period ≈ добавочное, дополнительное время cooling-off period honeymoon period incubation period rest period transitional period trial period waiting period
2) эпоха, значительный отрезок времени in a certain period ≈ в определенный момент, период in that period of history ≈ в этот исторический период prehistoric period ≈ доисторический период
3) мн. риторическая, "цветистая" речь( с точки зрения стиля)
4) а) мед. приступ, период обострения заболевания б) мн. менструация Syn: menses, catamenia
5) грам. период, большое сложное законченное предложение Tosltoy often used periods in his novels. ≈ толстой в своих романах очень часто прибегал к периодам.
6) а) пауза в конце периода, в конце предложения б) точка (знак препинания) Syn: full stop
7) фиксированный, отведенный, регламентированный интервал времени для чего-л. а) мат.;
астр.;
геол. период Syn: age, cycle, aeon, epoch, era, generation б) урок( в школе и т.д.)
8) муз. период
2. прил. относящийся к определенному периоду (о мебели, платье и т. п.) the practical book of period furniture ≈ практическое руководство по мебели разных периодов период, промежуток времени;
срок - lasting for a * of three months длящийся три месяца, сроком в три месяца - within the agreed * в пределах оговоренного срока - they visited us for a short * они немного погостили у нас - fixed * установленный период времени /срок/ - at this * of the year в это время года - a * of famine голодные времена - * of rest время /час/ отдыха;
передышка - extra /overtime/ * (спортивное) добавочное время (игры) - trial * испытательный срок стадия - *s of a disease стадии болезни - the * of incubation инкубационный период урок, занятие - a history * урок истории эпоха, время - the costume of the * костюм данной эпохи - * of change время перемен - catchwords of the * словечки, модные в определенную эпоху - sentiments of the * чувства, характерные для данной эпохи (грамматика) сложное законченное предложение;
фраза - well-rounded *s закругленные фразы точка;
пауза в конце предложения конец - to put a * to smth. поставить точку, положить конец чему-л. pl цветистая речь, риторика часто pl (физиологическое) месячные, менструация точка ( отделяющая целое число от десятых долей) (физическое) период колебаний - *s per second число оборотов /колебаний/ в секунду - natural * собственный период (колебаний) (специальное) цикл - transformation * период полураспада;
период /длительность/ превращения - combustion * период работы двигателя;
период активного полета - wave * период волны - circular orbit * период круговой орбиты спутника Земли (геология) эпоха, период - Silurian * силурийская система( музыкальное) период (спортивное) период относящийся к определенному периоду - * play комедия нравов - * house старинный дом - * film исторический кинофильм - * furniture стильная мебель - * room комната, обставленная старинной мебелью - * contract (юридическое) долгосрочный договор accounting ~ отчетный период accounting ~ период бухгалтерской отчетности accounting ~ расчетный период accounting ~ учетный период accounting ~ финансовый год accrual ~ период накопления (средств) additional maturity ~ пролонгированный срок долгового обязательства amortization ~ срок погашения долга в рассрочку average collection ~ средний срок взыскания долгов balancing ~ период сальдирования basic rental ~ основной срок аренды billing ~ расчетный период billing ~ расчетный срок budget ~ бюджетный период busy ~ период занятости carry-back ~ период покрытия убытков компании за счет прибыли за прошлое время circulation ~ период обращения construction ~ период строительства contract ~ срок действия контракта cooling ~ период охлаждения cooling-off ~ период обдумывания и переговоров credit ~ срок кредита deflationary ~ дефляционный период delay ~ период задержки delay ~ период запаздывания delivery ~ срок доставки earning ~ период пребывания на оплачиваемой работе election ~ период выборов electoral ~ период выборов elimination ~ период ликвидации exemption ~ период освобождения от налога extension ~ продленный срок financial ~ финансовый период fiscal ~ период налогообложения forbearance ~ период воздержания от действия forbearance ~ период отказа от применения принудительных мер forecasting ~ период прогнозирования forecasting ~ прогнозируемый период period время, эпоха;
our own period наша эпоха, наше время;
the girl of the period тип современной девушки given ~ данный период given ~ установленный срок grace ~ льготный период grace ~ льготный срок grace ~ период отсрочки guarantee ~ гарантийный срок holiday ~ отпускной период idle ~ нерабочий период idle ~ перерыв в работе idle ~ период бездействия idle ~ простой inactive ~ неэффективный период income ~ период получения дохода indemnity ~ гарантийный период indemnity ~ период компенсации убытков indemnity ~ срок возмещения вреда, ущерба, убытков inquiry ~ срок расследования insurance ~ срок страхования interest-paying ~ период начисления процентов intervening ~ наступающий период intervention ~ интервенционный период lean ~ неурожайное время legal storage ~ установленный законом период хранения legislative ~ законодательный период licensing ~ срок лицензирования loan ~ срок погашения ссуды lock-up ~ срок действия глобальных обязательств lock-up ~ бирж. срок запрета продажи maturity ~ период, когда наступает срок платежа mustering ~ период освидетельствования period время, эпоха;
our own period наша эпоха, наше время;
the girl of the period тип современной девушки part ~ неполный период pay ~ период платежа pay-back ~ срок возврата денег payback ~ период окупаемости капиталовложений payment ~ срок платежа payoff ~ период окупаемости payout ~ срок выплаты peak ~ период максимального товарооборота peak ~ период максимальной нагрузки period время, эпоха;
our own period наша эпоха, наше время;
the girl of the period тип современной девушки ~ время ~ круг, цикл ~ pl менструация ~ относящийся к определенному периоду (о мебели, платье и т. п.) ~ пауза в конце периода;
точка;
to put a period (to smth.) поставить точку;
положить конец (чему-л.) ~ период, промежуток времени ~ мат., астр., геол. период ~ грам. период, большое сложное законченное предложение ~ период;
промежуток времени;
period of years определенный период времени ~ период ~ промежуток времени ~ pl риторическая речь ~ риторическая речь ~ срок ~ стадия ~ for lodging appeal срок обжалования апелляции ~ of a partnership период сотрудничества ~ of acquisition период приобретения ~ of adversity неблагоприятный период ~ of adversity период пассивного баланса ~ of assessment период оценки в целях налогообложения ~ of cancellation срок окончательной оплаты ~ of cancellation срок погашения ~ of comparison период сравнения ~ of contribution срок взноса ~ of cover период страхования ~ of crisis период кризиса ~ of employment период занятости ~ of employment период работы( на рабочем месте) ~ of gestation период беременности ~ of grace льготный срок ~ of high cost of living период высокого прожиточного минимума ~ of high interest rates период высоких ставок процента ~ of hire срок проката ~ of indemnification срок возмещения убытка ~ of indemnification срок компенсации ~ of indemnity срок возмещения убытка ~ of indemnity срок компенсации ~ of insurance период действия договора страхования ~ of intervention период валютной интервенции ~ of irremovability период несмещения с должности ~ of limitation срок исковой давности ~ of loan срок кредитования ~ of nonterminability период несмещения с должности ~ of notice срок извещения ~ of notice срок оповещения ~ of notice срок уведомления ~ of notice of termination of contract срок уведомления о расторжении контракта ~ of notification срок уведомления ~ of operation период эксплуатации ~ of operation рабочий период ~ of payment срок платежа ~ of production время производства ~ of prosperity период процветания ~ of quiet период застоя ~ of recession период спада ~ of reference срок передачи на рассмотрение ~ of repayment срок выплаты ~ of repayment срок погашения ~ of report отчетный период ~ of report период отсрочки платежа за купленные акции на Лондонской фондовой бирже ~ of residence срок проживания ~ of scarcity период дефицита ~ of service продолжительность работы ~ of slack growth период медленного роста ~ of storage период хранения ~ of taxation период налогообложения ~ of time период времени ~ of transition переходный период ~ of use продолжительность использования ~ of validity срок действия ~ of vigorous growth период интенсивного роста ~ период;
промежуток времени;
period of years определенный период времени ~ of zero growth период нулевого роста ~ to maturity срок платежа ~ to maturity срок погашения policy ~ период ограниченной ответственности фирмы за дефекты policy ~ срок действия страхового полиса policy ~ срок страхования post-war ~ послевоенный период practice ~ практика, период практики ( в учебной программе) preceding ~ предшествующий период preliminary ~ предварительный период premium ~ срок уплаты страхового взноса probation ~ испытательный срок (период обучения или работы) probationary ~ испытательный срок ~ пауза в конце периода;
точка;
to put a period (to smth.) поставить точку;
положить конец (чему-л.) qualifying ~ испытательный срок quiet ~ период регистрации займа в Комиссии по ценным бумагам и биржам в США recession ~ период спада redemption ~ период возвращения долга redemption ~ период выкупа redemption ~ период погашения reference ~ базовый период reference ~ отчетный период relevant ~ соответствующий период remaining ~ оставшийся срок renewal ~ период восстановления repayment ~ срок выплаты repayment ~ срок погашения reporting ~ отчетный период rollover ~ период очередной фиксации плавающей ставки по кредиту run-in ~ период обкатки run-in ~ период приработки rush ~ период наибольшей нагрузки settlement ~ платежный период settling ~ расчетный период shakedown ~ вчт. период освоения shipping ~ навигационный период slack ~ период затишья slack ~ спад в промышленности specified ~ установленный период steady ~ период стабильности subscription ~ период подписки tax ~ период налогообложения taxation ~ период налогообложения transition ~ переходный период transition: ~ attr. переходный;
transition period переходный период;
transition curve мат. переходная кривая;
transition stage переходная стадия transitional ~ переходный период transitional ~ промежуточный период trial ~ испытательный срок trial ~ срок испытания trial: ~ attr. пробный, испытательный;
trial period испытательный срок unemployment ~ период безработицы useful life ~ период нормальной эксплуатации validity ~ срок юридического действия waiting ~ время ожидания waiting ~ период ожидания( до наступления права на пособие и т. д.) waiting ~ период отсрочки ответственности страховщика waiting ~ срок ожидания weak ~ период затишья weak ~ спад производства winding up ~ ликвидационный период

 
- accounting law
- administrative law
- agrarian law
- anti-bribery law
- anticartel law
- anti-corruption law
- anti-money-laundering law
- antitrust law
- applicable law
- applicable tax law
- bank law
- bank confidentiality law
- bankruptcy law
- basic law
- blue sky laws
- business law
- case law
- civil law
- commercial law
- common law
- company law
- constitutional law
- consumer's law
- contract law
- contractual law
- corporate law
- criminal law
- currency law
- current tax laws
- customary law
- customs law
- design law
- distribution law
- domestic law
- draft law
- economic law
- economical law
- emergency law
- environmental laws
- equipartition law
- equity law
- established law
- exchange law
- existing law
- fiscal law
- foreign laws
- formal law
- fundamental law
- general economic laws
- governing law
- immigration law
- income tax law
- industrial relations law
- insolvency law
- international law
- international monetary law
- invention law
- inventor's law
- investment laws
- job protection laws
- judiciary law
- labour laws
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- lending limitation law
- lenient law
- licence law
- local laws
- mandatory law
- marine insurance law
- maritime law
- market economy laws
- mercantile law
- merchant law
- merchant shipping law
- minimum-hour law
- minimum-wage law
- natural law
- objective laws
- Parkinson law
- patent law
- private law
- prohibitory law
- public law
- quarantine laws
- registration law
- remedial law
- resale price maintenance laws
- revenue law
- semi-legislative law
- space law
- state law
- statistical law
- statute law
- statutory law
- strike law
- stringent law
- subordinate law
- tariff law
- tax law
- taxation law
- tort law
- trademark law
- uniform law
- valuation law
- zoning laws
- laws in action
- laws in force
- law of average profit
- law of contracts
- law of corporations
- law of diminishing returns
- law of economy of time
- law of equity
- law of merchants
- law of monetary circulation
- laws of nature
- law of obligations
- laws of probability
- law of property
- law of the sea
- law of supply and demand
- law of value
- law on bankruptcy
- law on insolvency
- law on land sales
- laws on taxes and charges
- against the law
- at law
- in law
- under the law
- abide by the law
- abrogate a law
- adopt a law
- annul a law
- apply a law
- become a law
- be governed by a law
- break a law
- carry a law into effect
- circumvent antimonopoly law
- comply with a law
- effect a law
- elaborate a law
- enact a law
- enforce a law
- evade a law
- extend a law
- give effect to a law
- go beyond a law
- go to law
- implement a law
- infringe a law
- keep within a law
- lay down a law
- modify the law
- observe laws
- offend against a law
- pass a law
- put a law into effect
- put a law into force
- repeal a law
- resort to law
- respect a law
- sidestep a law
- transgress a law
- update a bankruptcy law
- veto the law
- violate a law
- violate laws on securities trading

- acceptable terms
- attractive terms
- barter terms
- basic terms
- basis terms
- business terms
- buying terms
- cash terms
- charter terms
- charter-party terms
- collection terms
- commercial terms
- concessionary terms
- consignment terms
- contract terms
- credit terms
- credit payment terms
- current terms
- delivery terms
- discharging terms
- discount terms
- easy terms
- easy terms of licensing
- easy terms of payment
- easy tax terms
- equal terms
- exact terms
- exacting terms
- expired term
- exploration term
- extended term
- extended payment term
- extension terms
- fair terms
- favourable terms
- financial terms
- financing terms
- general terms
- general delivery terms
- granted term
- guarantee terms
- implied terms
- inequitable terms
- initial terms
- insurance terms
- landed terms
- legal terms
- licence term
- licensing terms
- loan terms
- local terms
- long term
- normal terms
- overriding term
- payment terms
- preferential terms
- priority term
- prolonged term
- purchase terms
- quay terms
- regular terms
- rye terms
- sale terms
- selling terms
- settlement terms
- short term
- soft terms
- special terms
- standard terms
- substantive terms
- technical terms
- trade terms
- trading terms
- unacceptable terms
- unequal terms
- uniform terms
- usual terms
- terms for the supply
- terms of acceptance
- term of an agreement
- term of an appeal
- term of an application
- terms of auction
- terms of an average bond
- term of a bill
- terms of cancellation
- terms of carriage
- terms of a charter
- terms of collection
- terms and conditions of a contract
- terms of consignation
- terms of consignment
- terms of a contract
- terms of conveyance
- term of credit
- terms of debenture
- terms of a debt
- term of delivery
- terms of delivery
- terms of exchange
- term of execution of a contract
- terms of financing
- terms of freight
- term of grace
- terms of a guarantee
- terms of interest
- terms of a lease
- term of a licence
- term of licence validity
- term of limitation
- term of a loan
- term of lodging a protest
- term of a note
- terms of an offer
- term of office
- term of a patent
- term of patent protection
- terms of payment
- term of a policy
- term of powers
- term of a promissory note
- terms of a proposal
- terms of reference
- terms of reinsurance
- term of a repurchase agreement
- terms of sale
- terms of security
- term of service
- terms of settlement
- terms of shipment
- terms of trade
- terms of transport
- terms of transportation
- terms of a treaty
- term of validity
- term of a warrant
- terms of a warranty
- for a term of
- for a stated term
- in terms of
- in terms of dollars
- in terms of gold
- in percentage terms
- in physical terms
- in real terms
- in value terms
- on advantageous terms
- on contract terms
- on credit terms
- on easy terms
- on equal terms
- on favourable terms
- on mutually advantageous terms
- on mutually agreed terms
- on turn-key terms
- on usual terms
- under the terms and conditions of a contract
- accept terms
- agree on terms
- alter terms
- buy on easy terms
- come to terms
- come within the terms of a contract
- comply with the terms
- define terms
- exceed a term
- extend a term
- fix a term
- grant a term
- hold to terms
- honour payment terms
- keep the term
- maintain the term
- meet terms
- negotiate terms
- observe terms
- offer terms
- outline terms
- propose terms
- quote terms
- reduce a term
- revise terms
- sell on easy terms
- set a term
- specify terms
- spread payment terms
- stipulate terms
- stretch payment terms

- countably saturated model - countably uniform model - coupled channels model - finite state model - finitely generated model - game-theory model - random trial increment model - random walk model - sampling model

flight n abort the flight accelerated flight acceptance flight accident-free flight acrobatic flight actual flight conditions actual flight path adhere to the flight plan advance flight plan advertizing flight aerial survey flight aerial work flight aerobatic flight aerodrome flight information service aerotow flight affect flight operation aircraft flight report aircraft on flight air-filed flight plan all-freight flight all-weather flight alternate flight plan altitude flight approach flight reference point approach flight track distance approved flight plan approved flight procedure arbitrary flight course area flight control around-the-world flight arrival flight level arrow flight stability assigned flight path asymmetric flight attitude flight control autocontrolled flight automatic flight automatic flight control automatic flight control equipment automatic flight control system autorotational flight back-to-back flight bad-weather flight banked flight basic flight reference be experienced in flight beyond flight experience blind flight blind flight equipment blocked-off flight border-crossing flight border flight clearance box-pattern flight bumpy-air flight business flight calibration flight cancelled flight cancel the flight cargo flight carry out the flight certificate of safety for flight certification test flight change to a flight plan charter flight chased flight checkout flight civil flight climbing flight closed-circuit flight close the flight closing a flight plan coasting flight coast-to-coast flight commence the flight commercial flight complete the flight complete the flight plan compulsory IFR flight computer-directed flight computer flight planning conflicting flight path connecting flight contact flight contact flight rules continue the flight continuous flight continuous flight record contour flight controlled flight conventional flight crabbing flight credit flight time crop control flight cross-country flight cross-wind flight cruising flight current flight plan day flight decelerate in the flight decelerating flight delayed flight delivery flight demonstration flight departure flight level descending flight design flight weight desired flight path desired path flight desired track flight deviate from the flight plan deviation from the level flight digital flight guidance system digital flight recorder directed reference flight direct flight distance flight diverted flight domestic flight domestic flight stage downward flight drift flight dual flight eastbound flight effect on flight characteristics emergency flight emergency flight procedures empty flight endurance flight engine-off flight engine-on flight en-route flight en-route flight path en-route flight phase en-route flight planning entire flight establish the flight conditions estimated time of flight exercise flight supervision experimental flight extra flight extra section flight factory test flight familiarization flight fatal flight accident ferry flight filed flight plan file the flight plan first-class flight flapless flight flight acceptance test flight accident flight altitude flight announcement flight assurance flight baby cot flight book flight briefing flight calibration flight certificate flight characteristics flight chart flight check flight checked flight clearance flight compartment flight compartment controls flight compartment view flight computer flight conditions flight control flight control boost system flight control fundamentals flight control gust-lock system (при стоянке воздушного судна) flight control load flight control system flight coordination flight corrective turn flight coupon flight coupon stage flight course flight crew flight crew duty flight crew equipment flight crew member flight crew oxygen system flight crews provision flight crew supervision flight data flight data averaging flight data input flight data link flight data recorder flight data storage unit flight dead reckoning flight deck flight deck aural environment flight deck environment flight departure flight deterioration flight direction flight director flight director computer flight director course indicator flight director indicator flight director system flight director system control panel flight discrepancy flight dispatcher flight distance flight distance-to-go flight diversion flight documentation flight documenting flight duration flight duty period 2. полетное рабочее время flight emergency circumstance flight endurance flight engineer flight engineer's seat flight engineer station flight envelope flight environment data flight environment data system (условий полета) flight evaluation flight evasive aquisition flight examination flight experience flight fitness flight following flight forecast flight gyroscope flight history flight hour flight idle flight idle power flight idle speed flight idle stop (для предупреждения перевода на отрицательную тягу винта) flight inbound the station flight indicator flight information 2. стирать запись полетной информации flight information board flight information center flight information display flight information region flight information service flight information service unit flight inspection personnel flight inspection system flight inspector flight instruction flight instructor flight instrument reading flight lane flight level flight level table flight load flight load feel mechanism flight loading conditions flight logbook flight longitude flight management flight management computer system flight management system flight map flight mode flight monitoring 2. контроль за полетом flight navigation flight navigator flight occurrence identification flight on heading flight operating safety flight operation flight operations expert flight operations instructor flight operations personnel flight operations system flight operator flight outbound the station flight over the high seas flight path flight path angle flight path curvature flight path envelope flight path segment flight path tracking flight performance flight personnel flight personnel information flight pick-up equipment flight plan flight plan clearance flight plan filing flight plan form flight planner flight planning flight plan submission deadline flight precise information flight preparation flight preparation form flight procedure flight procedures trainer flight progress board flight progress display flight progress information flight progress strip flight range flight range with no reserves flight reasonable precautions flight recorder flight recorder record flight recorder recording flight recorder system flight recording medium flight recovery flight regularity communication flight regulation flight replanning flight report flight report identification flight request flight restart flight restart button flight resumption flight review flight route flight routing flight rules flight safety flight safety hazard flight safety precautions flight schedule flight service flight service kit flight service range flight service station flight significant information flight simulation flight simulation system flight simulator flight speed flight spoiler flight stage flight standards flight status (определяет степень важности полета) flight stress measurement tests flight strip flight supervision flight technique flight test flight test noise measurement flight test procedure flight test recorder flight test technique flight thrust flight time flight time limitation flight timetable flight track flight training flight training deficiency flight training procedure flight type flight under the rules flight urgency signal flight visibility flight visual contact flight visual cue flight visual range flight watch flight weather briefing flight wind shear formation flight free flight full-scale flight full-throttle flight given conditions of flight gliding flight go-around flight manoeuvre govern the flight grid flight handle the flight controls hazardous flight conditions head-down flight head-up flight head-wind flight hidden flight hazard high-speed flight hing-altitude flight holding flight holding flight level horizontal flight horizontal flight path hover flight hypersonic flight idle flight inaugural flight inclusive flight incontrollable flight in flight in flight blunder in flight bump instructional check flight instructional dual flight instructional solo flight instrument flight instrument flight plan instrument flight procedure instrument flight rules instrument flight rules operation instrument flight trainer instrument flight training intended flight intended flight path intermediate flight stop international flight international flight stage introductory flight inward flight jeopardize flight safety jeopardize the flight jettisoned load in flight latch the propeller flight stop lateral flight path level flight level flight noise requirements level flight path level flight time limit flight time line of flight line oriental flight training local flight long-distance flight low altitude flight planning chart lower flight level low flight low-level flight low-speed flight low-visibility flight maiden flight maintain the flight level maintain the flight procedure maintain the flight watch man-directed flight manipulate the flight controls mechanical flight release latch meteorological reconnaissance flight mid-course flight minimum flight path misinterpreted flight instructions misjudged flight distance mode of flight modify the flight plan monitor the flight multistage flight night flight noise certification takeoff flight path noiseless flight nonrevenue flight nonscheduled flight nonstop flight nontraffic flight nonvisual flight odd flight level off-airway flight one-stop flight one-way flight on-type flight experience operational flight information service operational flight plan operational flight planning operational flight procedures orientation flight out-and-return flight out-of-trim flight outward flight overland flight oversold flight overwater flight overweather flight performance flight pleasure flight point-to-point flight portion of a flight positioning flight powered flight power-off flight power-on flight practice flight prearranged flight prescribed flight duty prescribed flight track preset flight level private flight production test flight profit-making flight provisional flight forecast radio navigation flight reach the flight level rearward flight receive flight instruction reference flight reference flight procedure reference flight speed refuel in flight refuelling flight regular flight relief flight repetitive flight plan replan the flight reportable flight coupon report reaching the flight level restart the engine in flight resume the flight return flight revenue earning flight rhumb-line flight rotorcraft flight structure round-trip flight routine flight sailing flight scheduled flight sector flight select the flight route shakedown flight short-haul flight shuttle flights sideward flight speed (вертолета) sight-seeing flight simulated flight simulated flight test simulated instrument flight single-engined flight single-heading flight soaring flight solo flight special event flight stabilized flight staggered flight level stall flight standoff flight stationary flight steady flight steady flight speed still-air flight still-air flight range stored flight plan straight flight submission of a flight plan submit the flight plan subsonic flight supernumerary flight crew supersonic flight supervised flight supplementary flight plan synthetic flight trainer tailwind flight takeoff flight path takeoff flight path area taxi-class flight terminate the flight test flight test in flight theory of flight through flight through on the same flight total flight experience traffic by flight stage training dual flight training flight training flight engineer training solo flight transfer flight transient flight transient flight path transit flight trial flight turbulent flight turnround flight unaccelerated flight uncontrolled flight under flight test undergo flight tests unofficial flight information unscheduled flight unsteady flight upper flight information region upper flight level upper flight region usable flight level vectored flight visual contact flight visual flight visual flight rules visual navigation flight VOR course flight while in flight wings-level flight with rated power flight